CN106289415A - A kind of piping flow calculates method, device and pipe-line system - Google Patents

Abstract

The present invention relates to monitoring technical field, open a kind of piping flow calculates method, device and pipe-line system, and the method comprises determining that the pressure drop at described measuring section two ends of the fluid in the measuring section of pipeline；Wherein, described measuring section is the pipeline section chosen according to preset length in described pipeline, and described measuring section includes at least one pipeline；The property parameters of the fluid in property parameters according to described measuring section and described measuring section, determines the flow of fluid in described measuring section and the corresponding relation of flow velocity；The corresponding relation of the flow according to the fluid in described measuring section and flow velocity, determines the flow of fluid in described measuring section.The method can be not required to use effusion meter to measure according to the flow of the fluid calculated in pipeline, therefore can save the effusion meter in pipe-line system, and improving the energy consumption brought because of the use of effusion meter increases and use cost rising problem.

Description

A kind of piping flow calculates method, device and pipe-line system

Technical field

The present invention relates to monitoring technical field, calculate method, device and pipe-line system particularly to a kind of piping flow.

Background technology

At present, in the pipe-line system of conveyance fluid, Pressure gauge and effusion meter need to be installed on pipeline, for inspection The pressure of the fluid in test tube road and changes in flow rate, and carry out data collection and analysis.

But, the flowing measuring part meeting convection cell of conventional effusion meter produces resistance, in the course of conveying of fluid Add extra energy expenditure, be unfavorable for saving energy and reduce the cost.And some conventional flowmeter structures complexity, its measurement result is easily subject to Using environmental effect, continuous often maintenance, adds use cost after long-term use.

Therefore, how to improve energy consumption increase and the use cost rising brought in pipe-line system because of the use of effusion meter to ask Topic, it has also become ability and technical staff's problem demanding prompt solution.

Summary of the invention

The invention provides a kind of piping flow and calculate method, device and pipe-line system, the method can be according to calculating The flow of the fluid in pipeline, is not required to use effusion meter to measure, therefore can save the effusion meter in pipe-line system, improve The energy consumption brought because of the use of effusion meter increases and use cost rising problem.

For achieving the above object, the present invention provides following technical scheme:

A kind of piping flow calculates method, including:

Determine the pressure drop at described measuring section two ends of the fluid in the measuring section of pipeline；Wherein, described measuring section be The pipeline section chosen according to preset length in described pipeline, described measuring section includes at least one pipeline；

The property parameters of the fluid in property parameters according to described measuring section and described measuring section, determines described measuring section The flow of interior fluid and the corresponding relation of flow velocity；

The corresponding relation of the flow according to the fluid in described measuring section and flow velocity, determines fluid in described measuring section Flow.

In the piping flow calculating method that the present invention provides, obtain the pressure at described measuring section two ends of the fluid in measuring section Power, and according to the property parameters of the fluid in the property parameters of described measuring section and described measuring section, in determining described measuring section The flow of fluid, the method is not required to use effusion meter to measure the flow of the fluid that can draw in pipeline, therefore can save Removing the effusion meter in pipe-line system, improving the energy consumption brought because of the use of effusion meter increases and use cost rising problem.

Preferably, when described measuring section includes a pipeline, the described property parameters according to described measuring section and described The property parameters of the fluid in measuring section, determines the flow of fluid in described measuring section and the corresponding relation of flow velocity, specifically wraps Include:

The property parameters of the fluid in property parameters according to described measuring section and described measuring section, determines described measuring section The flow of interior fluid and the corresponding relation of flow velocity；

According to the property parameters of the fluid in described measuring section, determine the Reynolds number of fluid in described measuring section；

According to the property parameters of described measuring section, determine the relative roughness of described measuring section；

According to pressure, the property parameters of described measuring section and the institute at described measuring section two ends of the fluid in described measuring section State the property parameters of fluid in measuring section, determine the pressure drop of described measuring section and the property parameters of described measuring section and described The corresponding relation of the property parameters of the fluid in measuring section.

Preferably, the property parameters of the fluid in the described property parameters according to described measuring section and described measuring section, really The flow of the fluid in fixed described measuring section and the corresponding relation of flow velocity, specifically include:

The property parameters of described measuring section includes the internal diameter of the measuring section of described pipeline；

The flow of the fluid in described measuring section and the corresponding relation of flow velocity meet following equation:

$d=18.8{\left(\frac{V_f}{u}\right)}^{0.5}=18.8{\left(\frac{W}{u\mathrm{\ρ}}\right)}^{0.5};$

Wherein, described d is the internal diameter of measuring section of described pipeline；

Described V_fVolume flow for the fluid in described measuring section；

Described W is the mass flow of the fluid in described measuring section；

Described ρ is the density of the fluid in described measuring section；

Described u is the mean flow rate of the fluid in described measuring section.

Preferably, the described property parameters according to the fluid in described measuring section, determine fluid in described measuring section Reynolds number, specifically includes:

The property parameters of the fluid in described measuring section includes the viscosity of the fluid in described measuring section；

The Reynolds number of the fluid being determined according to the following equation in described measuring section:

Re=du ρ/μ；

Wherein, the Reynolds number of the fluid in described Re is described measuring section；

Described μ is the viscosity of the fluid in described measuring section.

Preferably, the described property parameters according to described measuring section, determine the relative roughness of described measuring section, specifically wrap Include:

The property parameters of described measuring section includes the absolute roughness of described measuring section inner tubal wall；

The relative roughness of described measuring section meets following equation:

λ=64/Re, Re < 2300；

Re>2300；

4000<Re<10⁷；

Wherein, described λ is the coefficient of friction of described measuring section inner tubal wall；

Described ε is the absolute roughness of described measuring section inner tubal wall.

Preferably, the property parameters of the fluid in the described property parameters according to described measuring section and described measuring section, really The pressure drop of fixed described measuring section is right with the property parameters of the fluid in the property parameters of described measuring section and described measuring section Should be related to, specifically include:

The property parameters of described measuring section includes that the equivalent of the pipe fitting on the length of described measuring section, described measuring section is long Degree, the level height residing for two ends of described measuring section；

The property parameters of the fluid in described measuring section includes that the fluid in described measuring section is at described measuring section two ends Flow velocity；

The attribute ginseng of the fluid in the property parameters of the pressure drop of described measuring section and described measuring section and described measuring section The corresponding relation of number meets following equation:

Δ P=Δ P_a+ΔP_N+ΔP_f+ΔP_c；

ΔP_a=(Z₂-Z₁)ρg；

${\mathrm{\&Delta;P}}_N=\frac{u_2^2-u_1^2}{2}\mathrm{\&rho;};$

ΔP_c=S_c*V_f ²；

S_c=8344.29*Q_c ^-0.103；

Or,

ΔP_f=(S_PIPE+S_LOCAL)*V_f ²；

$S_{PIPE}=\frac{8\mathrm{\&lambda;}l}{{\mathrm{g\&pi;}}^2{d}^5};$

Or,

Re>4000；

Re<2300；

Wherein, described Δ P is the total pressure drop of described measuring section；

Described Δ P_aStatic pressure for described measuring section drops；

Described Δ P_NVelocity pressure for described measuring section drops；

Described Δ P_fFriction drop for described measuring section；

Described Δ P_cSurface cooler pressure drop for described measuring section.

Described g is acceleration of gravity；

Described Z₂For the level height residing for described measuring section one end, described Z₁For the water residing for the described measuring section other end Flat height；

Described u₂For the mean flow rate of described measuring section one end, described u₂Mean flow rate for the described measuring section other end；

Described Q_cFor surface cooler cold warm water flow；

Described L is the length of described measuring section；

Described Le is the equivalent length of the pipe fitting on described measuring section.

Preferably, when described measuring section includes a plurality of pipeline, the described property parameters according to described measuring section and described The property parameters of the fluid in measuring section, determines the flow of fluid in described measuring section and the corresponding relation of flow velocity, specifically wraps Include:

The fluid in every pipeline in property parameters according to every pipeline in described measuring section and described measuring section Property parameters, determine the flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity.

Preferably, the property parameters of every pipeline in described measuring section includes: every pipeline in described measuring section The upper pump lift of every pipeline in impedance, described measuring section；

The property parameters of the fluid in every pipeline in described measuring section includes: in every pipeline in described measuring section The fluid each node in described measuring section on pressure；

The flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity meet following equation:

$\left\{\begin{array}{c}AG=0\\ A^{T}P=S\&CenterDot;G\left|G\right|-\mathrm{\&Delta;}H\end{array}\right.$

Wherein, described A is the fundamental interconnection matrix of the pipeline in described measuring section, and A=[a_ij]_n×m, wherein, described n, M is positive integer, and the number of nodes that n+1 is the pipeline in described measuring section, and described m is the pipe number in described measuring section Amount；And described a_ijMeet following equation:

$a_{ij}\left\{\begin{array}{c}1\\ -1\\ 0\end{array}\right.$

Wherein, the fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, and direction is When leaving node i, a_ij=1；The fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, side To for point to node i time, a_ij=-1；The fluid of the pipeline j in described measuring section is with the pipeline node i in described measuring section not When being connected, a_ij=0；

Described G is the m rank column vector of each bypass flow, and G=(G₁,G₂,…,G_m)^T；

Described P is the n rank column vector of n node pressure, and P=(P₁,P₂,…,P_n)^T；

Described S is the m rank column vector that each roadlock is anti-, and S=(S₁,S₂,…S_m)^T；

Described Δ H is the m rank column vector of pump lift on each branch road, and Δ H=(Δ H₁, Δ H₂..., Δ H_m)^T；If i-th section Water pump, then Δ H is not had on branch road_i=0.

Present invention also offers a kind of piping flow and calculate device, including:

Pressure acquiring unit, the pressure drop at described measuring section two ends of the fluid in the measuring section determining pipeline；Its In, described measuring section is the pipeline section chosen according to preset length in described pipeline, and described measuring section includes at least one pipeline；

First computing unit, the attribute ginseng of the fluid in the property parameters according to described measuring section and described measuring section Number, determines the flow of fluid in described measuring section and the corresponding relation of flow velocity；

Second computing unit, for the corresponding relation of the flow according to the fluid in described measuring section with flow velocity, determines institute State the flow of fluid in measuring section.

The piping flow that the present invention provides calculates in device, obtains the fluid in measuring section in institute by pressure acquiring unit State the pressure at measuring section two ends, and by the first computing unit and the second computing unit according to the property parameters of described measuring section and The property parameters of the fluid in described measuring section, determines the flow of fluid in described measuring section, and this device is not required to use flow Meter measures the flow of the fluid that can draw in pipeline, therefore can save the effusion meter in pipe-line system, improves because of stream The energy consumption that the use of gauge brings increases and use cost rises problem.

Preferably, when described measuring section includes a pipeline, described first computing unit, specifically for:

The property parameters of the fluid in property parameters according to described measuring section and described measuring section, determines described measuring section The flow of interior fluid and the corresponding relation of flow velocity；

According to the property parameters of the fluid in described measuring section, determine the Reynolds number of fluid in described measuring section；

According to the property parameters of described measuring section, determine the relative roughness of described measuring section；

According to pressure, the property parameters of described measuring section and the institute at described measuring section two ends of the fluid in described measuring section State the property parameters of fluid in measuring section, determine the pressure drop of described measuring section and the property parameters of described measuring section and described The corresponding relation of the property parameters of the fluid in measuring section.

Preferably, the property parameters of the fluid in the described property parameters according to described measuring section and described measuring section, really The flow of the fluid in fixed described measuring section and the corresponding relation of flow velocity, specifically include:

The property parameters of described measuring section includes the internal diameter of the measuring section of described pipeline；

The flow of the fluid in described measuring section and the corresponding relation of flow velocity meet following equation:

$d=18.8{\left(\frac{V_f}{u}\right)}^{0.5}=18.8{\left(\frac{W}{u\mathrm{\&rho;}}\right)}^{0.5};$

Wherein, described d is the internal diameter of measuring section of described pipeline；

Described V_fVolume flow for the fluid in described measuring section；

Described W is the mass flow of the fluid in described measuring section；

Described ρ is the density of the fluid in described measuring section；

Described u is the mean flow rate of the fluid in described measuring section.

Preferably, the described property parameters according to the fluid in described measuring section, determine fluid in described measuring section Reynolds number, specifically includes:

The property parameters of the fluid in described measuring section includes the viscosity of the fluid in described measuring section；

The Reynolds number of the fluid being determined according to the following equation in described measuring section:

Re=du ρ/μ；

Wherein, the Reynolds number of the fluid in described Re is described measuring section；

Described μ is the viscosity of the fluid in described measuring section.

Preferably, the described property parameters according to described measuring section, determine the relative roughness of described measuring section, specifically wrap Include:

The property parameters of described measuring section includes the absolute roughness of described measuring section inner tubal wall；

The relative roughness of described measuring section meets following equation:

λ=64/Re, Re < 2300；

Re>2300；

4000<Re<10⁷；

Wherein, described λ is the coefficient of friction of described measuring section inner tubal wall；

Described ε is the absolute roughness of described measuring section inner tubal wall.

Preferably, the property parameters of the fluid in the described property parameters according to described measuring section and described measuring section, really The pressure drop of fixed described measuring section is right with the property parameters of the fluid in the property parameters of described measuring section and described measuring section Should be related to, specifically include:

The property parameters of described measuring section includes that the equivalent of the pipe fitting on the length of described measuring section, described measuring section is long Degree, the level height residing for two ends of described measuring section；

The property parameters of the fluid in described measuring section includes that the fluid in described measuring section is at described measuring section two ends Flow velocity；

The attribute ginseng of the fluid in the property parameters of the pressure drop of described measuring section and described measuring section and described measuring section The corresponding relation of number meets following equation:

Δ P=Δ P_a+ΔP_N+ΔP_f+ΔP_c；

ΔP_a=(Z₂-Z₁)ρg；

${\mathrm{\&Delta;P}}_N=\frac{u_2^2-u_1^2}{2}\mathrm{\&rho;};$

ΔP_c=S_c*V_f ²；

S_c=8344.29*Q_c ^-0.103；

Or,

ΔP_f=(S_PIPE+S_LOCAL)*V_f ²；

$S_{PIPE}=\frac{8\mathrm{\&lambda;}l}{{\mathrm{g\&pi;}}^2{d}^5};$

Or,

Re>4000；

Re<2300；

Wherein, described Δ P is the total pressure drop of described measuring section；

Described Δ P_aStatic pressure for described measuring section drops；

Described Δ P_NVelocity pressure for described measuring section drops；

Described Δ P_fFriction drop for described measuring section；

Described Δ P_cSurface cooler pressure drop for described measuring section.

Described g is acceleration of gravity；

Described Z₂For the level height residing for described measuring section one end, described Z₁For the water residing for the described measuring section other end Flat height；

Described u₂For the mean flow rate of described measuring section one end, described u₂Mean flow rate for the described measuring section other end；

Described Q_cFor surface cooler cold warm water flow；

Described L is the length of described measuring section；

Described Le is the equivalent length of the pipe fitting on described measuring section.

Preferably, when described measuring section includes a plurality of pipeline, described first computing unit, specifically for:

The fluid in every pipeline in property parameters according to every pipeline in described measuring section and described measuring section Property parameters, determine the flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity.

Preferably, the property parameters of every pipeline in described measuring section includes: every pipeline in described measuring section The upper pump lift of every pipeline in impedance, described measuring section；

The property parameters of the fluid in every pipeline in described measuring section includes: in every pipeline in described measuring section The fluid each node in described measuring section on pressure；

The flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity meet following equation:

$\left\{\begin{array}{c}AG=0\\ A^{T}P=S\&CenterDot;G\left|G\right|-\mathrm{\&Delta;}H\end{array}\right.;$

Wherein, described A is the fundamental interconnection matrix of the pipeline in described measuring section, and A=[a_ij]_n×m, wherein, described n, M is positive integer, and the number of nodes that n+1 is the pipeline in described measuring section, and described m is the pipe number in described measuring section Amount；And described a_ijMeet following equation:

$a_{ij}\left\{\begin{array}{c}1\\ -1\\ 0\end{array}\right.$

Wherein, the fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, and direction is When leaving node i, a_ij=1；The fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, side To for point to node i time, a_ij=-1；The fluid of the pipeline j in described measuring section is with the pipeline node i in described measuring section not When being connected, a_ij=0；

Described G is the m rank column vector of each bypass flow, and G=(G₁,G₂,…,G_m)^T；

Described P is the n rank column vector of n node pressure, and P=(P₁,P₂,…,P_n)^T；

Described S is the m rank column vector that each roadlock is anti-, and S=(S₁,S₂,…S_m)^T；

Described Δ H is the m rank column vector of pump lift on each branch road, and Δ H=(Δ H₁, Δ H₂..., Δ H_m)^T；If i-th section Water pump, then Δ H is not had on branch road_i=0.

Present invention also offers a kind of pipe-line system, calculate device including piping flow as above.

In the pipe-line system that the present invention provides, calculate the pressure acquiring unit in device by piping flow and obtain measuring section In the fluid pressure at described measuring section two ends, and by computing unit according to the property parameters of described measuring section and described survey The property parameters of fluid in amount section, determines the flow of fluid in described measuring section, and this device is not required to use effusion meter to carry out Measurement can draw the flow of the fluid in pipeline, therefore can save the effusion meter in pipe-line system, improve because of effusion meter Use the energy consumption brought to increase and use cost rises problem.

Accompanying drawing explanation

Fig. 1 is the flow chart that a kind of piping flow that the embodiment of the present invention provides calculates method；

Fig. 2 is the structural representation that a kind of piping flow that the embodiment of the present invention provides calculates device.

Reference:

10, pressure measurement cell；20, the first computing unit；30, the second computing unit.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on this Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise Execute example, broadly fall into the scope of protection of the invention.

Embodiment one:

Shown in Figure 1, Fig. 1 calculates the flow chart of method for a kind of piping flow that the present embodiment provides, including:

Step S101, determines the pressure drop at measuring section two ends of the fluid in the measuring section of pipeline；Wherein, measuring section be The pipeline section chosen according to preset length in pipeline, measuring section includes at least one pipeline, when measuring section includes a plurality of pipeline, many Also can connect to be formed pipe network between bar pipeline, the coupling part between two pipelines in pipe network is node；

Step S102, according to the property parameters of the fluid in the property parameters of measuring section and measuring section, in determining measuring section The corresponding relation of flow and flow velocity of fluid；

Step S103, according to flow and the corresponding relation of flow velocity of the fluid in measuring section, determines the fluid in measuring section Flow.

Above-mentioned pressure reduces to the difference of the fluid pressure of the water side of pipeline and the fluid pressure of the backwater end of pipeline, specifically In enforcement, the pressure of pipe ends can be drawn by the Pressure gauge or pressure transducer measurement that are arranged on pipe ends；Measuring section is excellent Elect straight line pipeline section as, and for improving computational accuracy, the minima of the length of measuring section is preferably 5 times of tubing internal diameter.

In the piping flow calculating method that the present invention provides, in step S101, the fluid obtained in measuring section is being measured The pressure at section two ends, and the genus of the fluid in property parameters according to measuring section and measuring section in step S102 and step S103 Property parameter, in determining that the flow of fluid in measuring section, the method are not required to use effusion meter to measure and can draw pipeline The flow of fluid, therefore can save the effusion meter in pipe-line system, improve the energy consumption brought because of the use of effusion meter increase and Use cost rises problem.

In a kind of optimal way, when measuring section includes a pipeline, according in the property parameters of measuring section and measuring section The property parameters of fluid, determine flow and the corresponding relation of flow velocity of fluid in measuring section, specifically include:

The property parameters of the fluid in property parameters according to measuring section and measuring section, determines the stream of fluid in measuring section Amount and the corresponding relation of flow velocity；

According to the property parameters of the fluid in measuring section, determine the Reynolds number of fluid in measuring section；

According to the property parameters of measuring section, determine the relative roughness of measuring section；

According to the fluid in the pressure at measuring section two ends, the property parameters of measuring section and measuring section of the fluid in measuring section Property parameters, determine the right of the pressure drop of measuring section and the property parameters of the fluid in the property parameters of measuring section and measuring section Should be related to.

Specifically, according to the property parameters of the fluid in the property parameters of measuring section and measuring section, in determining measuring section The flow of fluid and the corresponding relation of flow velocity, specifically include:

The property parameters of measuring section includes the internal diameter of the measuring section of pipeline；

The flow of the fluid in measuring section and the corresponding relation of flow velocity meet following equation:

$d=18.8{\left(\frac{V_f}{u}\right)}^{0.5}=18.8{\left(\frac{W}{u\mathrm{\&rho;}}\right)}^{0.5};$

Wherein, d is the internal diameter of measuring section of pipeline；

V_fVolume flow for the fluid in measuring section；

W is the mass flow of the fluid in measuring section；

ρ is the density of the fluid in measuring section；

U is the mean flow rate of the fluid in measuring section.

In above formula, volume flow V of fluid_f, fluid in mass flow W of fluid and measuring section mean flow rate u equal For unknown quantity, need to carry out drawing after calculating solves.

Specifically, according to the property parameters of the fluid in measuring section, determine the Reynolds number of fluid in measuring section, specifically wrap Include:

The property parameters of the fluid in measuring section includes the viscosity of the fluid in measuring section；

The Reynolds number of the fluid being determined according to the following equation in measuring section:

Re=du ρ/μ；

Wherein, the Reynolds number of the fluid in Re is measuring section；

μ is the viscosity of the fluid in measuring section；Remaining letter implication is as above.

Reynolds number (Reynolds Number) is the dimensionless number that can be used to characterize fluid mobility status.Utilize Reynolds number The flowing that can distinguish fluid is laminar flow or turbulent flow, when Re < is laminar condition when 2300, when 2300 < Re < is transition shape when 4000 State, as Re > 4000 time be turbulence state, as Re > 10000 time be complete turbulence state, typically at Re > 3000 time can determine whether stream The flowing of body is turbulent flow.

Specifically, according to the property parameters of measuring section, determine the relative roughness of measuring section, specifically include:

The property parameters of measuring section includes the absolute roughness of measuring section inner tubal wall；

The relative roughness of measuring section meets following equation:

λ=64/Re, Re < 2300；λ in this formula is the coefficient of friction of measuring section inner tubal wall, Re < when 2300, fluid Flowing is laminar condition, and now the coefficient of friction of measuring section inner tubal wall and the absolute roughness of tube wall are unrelated；

Re>2300；At Re > 2300 time, the flowing of fluid is transitive state or rapids Stream mode, now can be according to the coefficient of friction λ of this formula computation and measurement section inner tubal wall；

Not enlightening formula:4000<Re<10⁷, at pipe This formula can be used when fluid in road is absolute turbulence state；

Wherein, λ is the coefficient of friction of measuring section inner tubal wall；

ε is the absolute roughness of measuring section inner tubal wall；And the relative roughness that ε/d is measuring section inner tubal wall.

Specifically, according to the property parameters of the fluid in the property parameters of measuring section and measuring section, the pressure of measuring section is determined The corresponding relation of the property parameters of the fluid in the property parameters with measuring section and measuring section drops in power, including:

The property parameters of measuring section include the equivalent length of the pipe fitting on the length of measuring section, measuring section, the two of measuring section Level height residing for end；

The property parameters of the fluid in measuring section includes the flow velocity at measuring section two ends of the fluid in measuring section；

The corresponding relation of the property parameters of the fluid in the pressure drop of measuring section and the property parameters of measuring section and measuring section Meet following equation:

Δ P=Δ P_a+ΔP_N+ΔP_f+ΔP_c；

ΔP_a=(Z₂-Z₁)ρg；

${\mathrm{\&Delta;P}}_N=\frac{u_2^2-u_1^2}{2}\mathrm{\&rho;};$

ΔP_c=S_c*V_f ²；

S_c=8344.29*Q_c ^-0.103；

Or,

ΔP_f=(S_PIPE+S_LOCAL)*V_f ²；

$S_{PIPE}=\frac{8\mathrm{\&lambda;}l}{{\mathrm{g\&pi;}}^2{d}^5};$

Or,

Re>4000；

Re<2300；

Wherein, Δ P is the total pressure drop of measuring section；

ΔP_aStatic pressure for measuring section drops；Static pressure fall is the pressure that pipeline is produced by the elevation difference at top with terminal Fall；

ΔP_NVelocity pressure for measuring section drops；Velocity pressure fall refers to that pipeline top and destination fluid flow velocity etc. do not produce Raw pressure drop；When the distance that measuring section is chosen is shorter, it is believed that the velocity variations at measuring section two ends is 0, then pressure drop is also It is 0；

ΔP_fFriction drop for measuring section；Pipeline friction drop includes the pressure drop of straight tube, pipe fitting and valve etc., Include orifice plate, the local pressure that varying aperture and adapter button etc. produce simultaneously；

ΔP_cSurface cooler pressure drop for described measuring section；

G is acceleration of gravity；

In above-mentioned formula, the friction drop Δ P of measuring section_fAbove-mentioned three kinds of formula can be used to calculate, be embodied as During need to select according to the actual requirements；

Wherein, Z₂For the height of measuring section one end, Z₁Height for the measuring section other end；

u₂For the mean flow rate of measuring section one end, u₂Mean flow rate for the measuring section other end；

Described Q_cFor surface cooler cold warm water flow；

L is the length of measuring section；

Le is the equivalent length of the pipe fitting on measuring section, and this equivalent length can be tabled look-up acquisition.

Above-mentioned the separate equations simultaneous one Nonlinear System of Equations of composition, is carried out according to the method for solving of Nonlinear System of Equations Solve and known parameter is substituted into, the density of the fluid in the internal diameter of the measuring section of the most above-mentioned pipeline, measuring section, measurement In tubular type that section viscosity, the length of measuring section, the height at measuring section two ends, measuring section are provided with and quantity, measuring section Fluid at the pressure at measuring section two ends, can solve flow and the mean flow rate the two unknown quantity of fluid in measuring section, wherein Flow is the result needed for calculating.Computer can be used soft it should be noted that carry out solving for flow rate calculation equation group Part realizes.

In a kind of optimal way, when measuring section includes a plurality of pipeline, according in the property parameters of measuring section and measuring section The property parameters of fluid, determine flow and the corresponding relation of flow velocity of fluid in measuring section, specifically include:

The attribute ginseng of the fluid in every pipeline in property parameters according to every pipeline in measuring section and measuring section Number, determines the flow of fluid in every pipeline in measuring section and the corresponding relation of flow velocity.

Specifically, the property parameters of every pipeline in measuring section includes: the impedance of every pipeline in measuring section, measurement The upper pump lift of every pipeline in Duan；

The property parameters of the fluid in every pipeline in measuring section includes: the fluid in every pipeline in measuring section exists The pressure on each node in measuring section；

The flow of fluid in every pipeline in measuring section and the corresponding relation of flow velocity meet following equation:

$\left\{\begin{array}{c}AG=0\\ A^{T}P=S\&CenterDot;G\left|G\right|-\mathrm{\&Delta;}H\end{array}\right.$

Wherein, A is the fundamental interconnection matrix of the pipeline in measuring section, and A=[a_ij]_n×m, wherein, n, m are positive integer, And the number of nodes that n+1 is the pipeline in measuring section, m is the number of tubes in measuring section；And a_ijMeet following equation:

$a_{ij}\left\{\begin{array}{c}1\\ -1\\ 0\end{array}\right.$

Wherein, the fluid of the pipeline j in measuring section is connected with the pipeline node i in measuring section, and direction is for leaving node i Time, a_ij=1；The fluid of the pipeline j in measuring section is connected with the pipeline node i in measuring section, when direction is for pointing to node i, a_ij=-1；When the fluid of the pipeline j in measuring section is not attached to the pipeline node i in measuring section, a_ij=0；

G is the m rank column vector of each bypass flow, and G=(G₁,G₂,…,G_m)^T；

P is the n rank column vector of n node pressure, and P=(P₁,P₂,…,P_n)^T；

S is the m rank column vector that each roadlock is anti-, and S=(S₁,S₂,…S_m)^T；

Δ H is the m rank column vector of pump lift on each branch road, and Δ H=(Δ H₁, Δ H₂..., Δ H_m)^T；If i-th section of branch road On there is no water pump, then Δ H_i=0.

Embodiment two:

Based on same inventive concept, the present embodiment additionally provides a kind of piping flow and calculates device, owing to this device solves It is similar that the principle of problem calculates method to the piping flow provided in the embodiment of the present invention one, and therefore the enforcement of this device can be joined The enforcement of square method, repeats no more in place of repetition.

Shown in Figure 2, Fig. 2 calculates the structural representation of device for the piping flow that the present embodiment provides, including:

Pressure acquiring unit 10, the pressure drop at measuring section two ends of the fluid in the measuring section determining pipeline；Wherein, Measuring section is the pipeline section chosen according to preset length in pipeline, and measuring section includes at least one pipeline；

First computing unit 20, the property parameters of the fluid in the property parameters according to measuring section and measuring section, really Determine the flow of fluid in measuring section and the corresponding relation of flow velocity；

Second computing unit 30, for the corresponding relation of the flow according to the fluid in measuring section with flow velocity, determines measurement The flow of the fluid in Duan.

The piping flow that the present invention provides calculates in device, and the fluid obtained in measuring section by pressure acquiring unit 10 is existed The pressure at measuring section two ends, and by the first computing unit 20 and the second computing unit 30 according to the property parameters of measuring section and survey The property parameters of fluid in amount section, determines the flow of fluid in measuring section, and this device is not required to use effusion meter to measure The flow of fluid in pipeline can be drawn, therefore can save the effusion meter in pipe-line system, improve the use because of effusion meter The energy consumption brought increases and use cost rises problem.

In a kind of optimal way, when measuring section includes a pipeline, the first computing unit 20, specifically for:

The property parameters of the fluid in property parameters according to measuring section and measuring section, determines the stream of fluid in measuring section Amount and the corresponding relation of flow velocity；

According to the property parameters of the fluid in measuring section, determine the Reynolds number of fluid in measuring section；

According to the property parameters of measuring section, determine the relative roughness of measuring section；

According to the fluid in the pressure at measuring section two ends, the property parameters of measuring section and measuring section of the fluid in measuring section Property parameters, determine the right of the pressure drop of measuring section and the property parameters of the fluid in the property parameters of measuring section and measuring section Should be related to.

Specifically, according to the property parameters of the fluid in the property parameters of measuring section and measuring section, in determining measuring section The flow of fluid and the corresponding relation of flow velocity, specifically include:

The property parameters of measuring section includes the internal diameter of the measuring section of pipeline；

The flow of the fluid in measuring section and the corresponding relation of flow velocity meet following equation:

$d=18.8{\left(\frac{V_f}{u}\right)}^{0.5}=18.8{\left(\frac{W}{u\mathrm{\&rho;}}\right)}^{0.5};$

Wherein, d is the internal diameter of measuring section of pipeline；

V_fVolume flow for the fluid in measuring section；

W is the mass flow of the fluid in measuring section；

ρ is the density of the fluid in measuring section；

U is the mean flow rate of the fluid in measuring section.

Specifically, according to the property parameters of the fluid in measuring section, determine the Reynolds number of fluid in measuring section, specifically wrap Include:

The property parameters of the fluid in measuring section includes the viscosity of the fluid in measuring section；

The Reynolds number of the fluid being determined according to the following equation in measuring section:

Re=du ρ/μ；

Wherein, the Reynolds number of the fluid in Re is measuring section；

μ is the viscosity of the fluid in measuring section.

Specifically, according to the property parameters of measuring section, determine the relative roughness of measuring section, specifically include:

The property parameters of measuring section includes the absolute roughness of measuring section inner tubal wall；

The relative roughness of measuring section meets following equation:

λ=64/Re, Re < 2300；

Re>2300；

4000<Re<10⁷；

Wherein, λ is the coefficient of friction of measuring section inner tubal wall；

ε is the absolute roughness of measuring section inner tubal wall.

Specifically, according to the property parameters of the fluid in the property parameters of measuring section and measuring section, the pressure of measuring section is determined The corresponding relation of the property parameters of the fluid in the property parameters with measuring section and measuring section drops in power, specifically includes:

The property parameters of measuring section include the equivalent length of the pipe fitting on the length of measuring section, measuring section, the two of measuring section Level height residing for end；

The property parameters of the fluid in measuring section includes the flow velocity at measuring section two ends of the fluid in measuring section；

The corresponding relation of the property parameters of the fluid in the pressure drop of measuring section and the property parameters of measuring section and measuring section Meet following equation:

Δ P=Δ P_a+ΔP_N+ΔP_f+ΔP_c；

ΔP_a=(Z₂-Z₁)ρg；

${\mathrm{\&Delta;P}}_N=\frac{u_2^2-u_1^2}{2}\mathrm{\&rho;};$

ΔP_c=S_c*V_f ²；

S_c=8344.29*Q_c ^-0.103；

Or,

ΔP_f=(S_PIPE+S_LOCAL)*V_f ²；

$S_{PIPE}=\frac{8\mathrm{\&lambda;}l}{{\mathrm{g\&pi;}}^2{d}^5};$

Or,

Re>4000；

Re<2300；

Wherein, Δ P is the total pressure drop of measuring section；

ΔP_aStatic pressure for measuring section drops；

ΔP_NVelocity pressure for measuring section drops；

ΔP_fFriction drop for measuring section；

ΔP_cSurface cooler pressure drop for measuring section.

G is acceleration of gravity；

Z₂For the level height residing for measuring section one end, Z₁For the level height residing for the measuring section other end；

u₂For the mean flow rate of measuring section one end, u₂Mean flow rate for the measuring section other end；

Q_cFor surface cooler cold warm water flow；

L is the length of measuring section；

Le is the equivalent length of the pipe fitting on measuring section.

In a kind of optimal way, when measuring section includes a plurality of pipeline, the first computing unit 20, specifically for:

The attribute ginseng of the fluid in every pipeline in property parameters according to every pipeline in measuring section and measuring section Number, determines the flow of fluid in every pipeline in measuring section and the corresponding relation of flow velocity.

Specifically, the property parameters of every pipeline in measuring section includes: the impedance of every pipeline in measuring section, measurement The upper pump lift of every pipeline in Duan；

The property parameters of the fluid in every pipeline in measuring section includes: the fluid in every pipeline in measuring section exists The pressure on each node in measuring section；

The flow of fluid in every pipeline in measuring section and the corresponding relation of flow velocity meet following equation:

$\left\{\begin{array}{c}AG=0\\ A^{T}P=S\&CenterDot;G\left|G\right|-\mathrm{\&Delta;}H\end{array}\right.;$

Wherein, A is the fundamental interconnection matrix of the pipeline in measuring section, and A=[a_ij]_n×m, wherein, n, m are positive integer, And the number of nodes that n+1 is the pipeline in measuring section, m is the number of tubes in measuring section；And a_ijMeet following equation:

$a_{ij}\left\{\begin{array}{c}1\\ -1\\ 0\end{array}\right.$

Wherein, the fluid of the pipeline j in measuring section is connected with the pipeline node i in measuring section, and direction is for leaving node i Time, a_ij=1；The fluid of the pipeline j in measuring section is connected with the pipeline node i in measuring section, when direction is for pointing to node i, a_ij=-1；When the fluid of the pipeline j in measuring section is not attached to the pipeline node i in measuring section, a_ij=0；

G is the m rank column vector of each bypass flow, and G=(G₁,G₂,…,G_m)^T；

P is the n rank column vector of n node pressure, and P=(P₁,P₂,…,P_n)^T；

S is the m rank column vector that each roadlock is anti-, and S=(S₁,S₂,…S_m)^T；

Δ H is the m rank column vector of pump lift on each branch road, and Δ H=(Δ H₁, Δ H₂..., Δ H_m)^T；If i-th section of branch road On there is no water pump, then Δ H_i=0.

Embodiment three:

Based on same inventive concept, the present embodiment additionally provides a kind of pipe-line system, owing to this system solves the former of problem It is similar that the piping flow managed and provide in the embodiment of the present invention one calculates method, and therefore the enforcement of this device may refer to method Implement, repeat no more in place of repetition.

The pipe-line system that the present embodiment provides, calculates device including piping flow as above.

In the pipe-line system that the present invention provides, calculate the pressure acquiring unit 10 in device by piping flow and obtain measurement Fluid in Duan is at the pressure at measuring section two ends, and by computing unit 20 according in the property parameters of measuring section and measuring section The property parameters of fluid, determines the flow of fluid in measuring section, and this device is not required to use effusion meter to measure and can draw The flow of the fluid in pipeline, therefore can save the effusion meter in pipe-line system, improve the energy brought because of the use of effusion meter Consumption increases and use cost rises problem.

Above by reference to the method illustrated according to present disclosure embodiment, device (system) and/or computer program Block diagram and/or flow chart present disclosure is described.Should be understood that can by computer program instructions realize block diagram and/or One block of flowchart illustration and the combination of the block of block diagram and/or flowchart illustration.Can be by these computer program instructions It is supplied to general purpose computer, the processor of special-purpose computer and/or other programmable data processing means, to produce machine, makes Must create via the instruction that computer processor and/or other programmable data processing means perform be used for realizing block diagram and/or The method of function/action specified in flow chart block.

Correspondingly, it is also possible to implement in the disclosure with hardware and/or software (including firmware, resident software, microcode etc.) Hold.Further, present disclosure can take computer to use or computer journey on computer-readable recording medium The form of sequence product, it has the computer realized in media as well and can use or computer readable program code, to be held by instruction Row system uses or combined command performs system and uses.In present disclosure context, computer can use or calculate Machine computer-readable recording medium can be arbitrary medium, and it can comprise, stores, communicates, transmit or transmission program, to be performed system by instruction System, device or equipment use, or combined command performs system, device or equipment and uses.

Obviously, those skilled in the art can carry out various change and modification without deviating from this to the embodiment of the present invention Bright spirit and scope.So, if these amendments of the present invention and modification belong to the claims in the present invention and equivalent technologies thereof Within the scope of, then the present invention is also intended to comprise these change and modification.

Claims (17)

1. a piping flow calculates method, it is characterised in that including:

Determine the pressure drop at described measuring section two ends of the fluid in the measuring section of pipeline；Wherein, described measuring section is described The pipeline section chosen according to preset length in pipeline, described measuring section includes at least one pipeline；

The property parameters of the fluid in property parameters according to described measuring section and described measuring section, in determining described measuring section The flow of fluid and the corresponding relation of flow velocity；

The corresponding relation of the flow according to the fluid in described measuring section and flow velocity, determines the stream of fluid in described measuring section Amount.

Piping flow the most according to claim 1 calculates method, it is characterised in that include a pipeline at described measuring section Time, the property parameters of the fluid in the described property parameters according to described measuring section and described measuring section, determine described measuring section The flow of interior fluid and the corresponding relation of flow velocity, specifically include:

The property parameters of the fluid in property parameters according to described measuring section and described measuring section, in determining described measuring section The flow of fluid and the corresponding relation of flow velocity；

According to the property parameters of the fluid in described measuring section, determine the Reynolds number of fluid in described measuring section；

According to the property parameters of described measuring section, determine the relative roughness of described measuring section；

According to pressure, the property parameters of described measuring section and the described survey at described measuring section two ends of the fluid in described measuring section The property parameters of the fluid in amount section, determines the pressure drop of described measuring section and the property parameters of described measuring section and described measurement The corresponding relation of the property parameters of the fluid in Duan.

Piping flow the most according to claim 2 calculates method, it is characterised in that the described attribute according to described measuring section The property parameters of the fluid in parameter and described measuring section, determines that the flow of the fluid in described measuring section is corresponding with flow velocity and closes System, specifically includes:

The property parameters of described measuring section includes the internal diameter of the measuring section of described pipeline；

The flow of the fluid in described measuring section and the corresponding relation of flow velocity meet following equation:

$d=18.8{\left(\frac{V_f}{u}\right)}^{0.5}=18.8{\left(\frac{W}{u\mathrm{\&rho;}}\right)}^{0.5};$

Wherein, described d is the internal diameter of measuring section of described pipeline；

Described V_fVolume flow for the fluid in described measuring section；

Described W is the mass flow of the fluid in described measuring section；

Described ρ is the density of the fluid in described measuring section；

Described u is the mean flow rate of the fluid in described measuring section.

Piping flow the most according to claim 2 calculates method, it is characterised in that described according to the stream in described measuring section The property parameters of body, determines the Reynolds number of fluid in described measuring section, specifically includes:

The property parameters of the fluid in described measuring section includes the viscosity of the fluid in described measuring section；

The Reynolds number of the fluid being determined according to the following equation in described measuring section:

Re=du ρ/μ；

Wherein, the Reynolds number of the fluid in described Re is described measuring section；

Described μ is the viscosity of the fluid in described measuring section.

Piping flow the most according to claim 2 calculates method, it is characterised in that the described attribute according to described measuring section Parameter, determines the relative roughness of described measuring section, specifically includes:

The property parameters of described measuring section includes the absolute roughness of described measuring section inner tubal wall；

The relative roughness of described measuring section meets following equation:

λ=64/Re, Re < 2300；

$\frac{1}{\sqrt{\mathrm{\&lambda;}}}=1.74-2\lg (\frac{2\mathrm{\&epsiv;}}{d}+\frac{18.7}{\mathrm{Re}\sqrt{\mathrm{\&lambda;}}}),\mathrm{Re}>2300;$

$\mathrm{\&lambda;}=0.0055(1+{\left(\frac{20000\mathrm{\&epsiv;}}{d}+{10}^6/\mathrm{Re}\right)}^{1/3}),4000<\mathrm{Re}<{10}^7;$

Wherein, described λ is the coefficient of friction of described measuring section inner tubal wall；

Described ε is the absolute roughness of described measuring section inner tubal wall.

Piping flow the most according to claim 2 calculates method, it is characterised in that the described attribute according to described measuring section The property parameters of the fluid in parameter and described measuring section, determines the pressure drop of described measuring section and the attribute ginseng of described measuring section The corresponding relation of the property parameters of the fluid in number and described measuring section, specifically includes:

The property parameters of described measuring section includes the equivalent length of the pipe fitting on the length of described measuring section, described measuring section, institute State the level height residing for the two ends of measuring section；

The property parameters of the fluid in described measuring section includes the flow velocity at described measuring section two ends of the fluid in described measuring section；

The property parameters of the fluid in the property parameters of the pressure drop of described measuring section and described measuring section and described measuring section Corresponding relation meets following equation:

Δ P=Δ P_a+ΔP_N+ΔP_f+ΔP_c；

ΔP_a=(Z₂-Z₁)ρg；

${\mathrm{\&Delta;P}}_N=\frac{u_2^2-u_1^2}{2}\mathrm{\&rho;};$

ΔP_c=S_c*V_f ²；

S_c=8344.29*Q_c ^-0.103；

Or,

ΔP_f=(S_PIPE+S_LOCAL)*V_f ²；

$S_{PIPE}=\frac{8\mathrm{\&lambda;}l}{{\mathrm{g\&pi;}}^2{d}^5};$

Or,

${\mathrm{\&Delta;P}}_f=\frac{\mathrm{\&lambda;}L}{D}\&CenterDot;\frac{u^2\mathrm{\&rho;}}{2}=6.26\&times;{10}^4\&CenterDot;\frac{{\mathrm{\&lambda;LV}}_f^2\mathrm{\&rho;}}{d^5}=6.26\&times;{10}^4\&CenterDot;\frac{{\mathrm{\&lambda;LW}}^2}{d^5\mathrm{\&rho;}},\mathrm{Re}>4000;$

${\mathrm{\&Delta;P}}_f=\frac{32\mathrm{\&mu;}ul}{d^2},\mathrm{Re}<2300;$

Wherein, described Δ P is the total pressure drop of described measuring section；

Described Δ P_aStatic pressure for described measuring section drops；

Described Δ P_NVelocity pressure for described measuring section drops；

Described Δ P_fFriction drop for described measuring section；

Described Δ P_cSurface cooler pressure drop for described measuring section.

Described g is acceleration of gravity；

Described Z₂For the level height residing for described measuring section one end, described Z₁Level residing for the described measuring section other end is high Degree；

Described u₂For the mean flow rate of described measuring section one end, described u₂Mean flow rate for the described measuring section other end；

Described Q_cFor surface cooler cold warm water flow；

Described L is the length of described measuring section；

Described Le is the equivalent length of the pipe fitting on described measuring section.

Piping flow the most according to claim 1 calculates method, it is characterised in that include a plurality of pipeline at described measuring section Time, the property parameters of the fluid in the described property parameters according to described measuring section and described measuring section, determine described measuring section The flow of interior fluid and the corresponding relation of flow velocity, specifically include:

The genus of the fluid in every pipeline in property parameters according to every pipeline in described measuring section and described measuring section Property parameter, determine the flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity.

Piping flow the most according to claim 7 calculates method, it is characterised in that

The property parameters of every pipeline in described measuring section includes: the impedance of every pipeline in described measuring section, described survey The upper pump lift of every pipeline in amount section；

The property parameters of the fluid in every pipeline in described measuring section includes: the stream in every pipeline in described measuring section Pressure on the body each node in described measuring section；

The flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity meet following equation:

$\left\{\begin{array}{c}AG=0\\ A^{T}P=S\&CenterDot;G\left|G\right|-\mathrm{\&Delta;}H\end{array}\right.$

Wherein, described A is the fundamental interconnection matrix of the pipeline in described measuring section, and A=[a_ij]_n×m, wherein, described n, m are Positive integer, and the number of nodes that n+1 is the pipeline in described measuring section, described m is the number of tubes in described measuring section；And institute State a_ijMeet following equation:

$a_{ij}\left\{\begin{array}{c}1\\ -1\\ 0\end{array}\right.$

Wherein, the fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, and direction is for leaving During node i, a_ij=1；The fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, and direction is When pointing to node i, a_ij=-1；The fluid of the pipeline j in described measuring section is not attached to the pipeline node i in described measuring section Time, a_ij=0；

Described G is the m rank column vector of each bypass flow, and G=(G₁,G₂,…,G_m)^T；

Described P is the n rank column vector of n node pressure, and P=(P₁,P₂,…,P_n)^T；

Described S is the m rank column vector that each roadlock is anti-, and S=(S₁,S₂,…S_m)^T；

Described Δ H is the m rank column vector of pump lift on each branch road, and Δ H=(Δ H₁, Δ H₂..., Δ H_m)^T；If i-th section of branch road On there is no water pump, then Δ H_i=0.

9. a piping flow calculates device, it is characterised in that including:

Pressure acquiring unit, the pressure drop at described measuring section two ends of the fluid in the measuring section determining pipeline；Wherein, institute Stating measuring section is the pipeline section chosen according to preset length in described pipeline, and described measuring section includes at least one pipeline；

First computing unit, the property parameters of the fluid in the property parameters according to described measuring section and described measuring section, Determine the flow of fluid in described measuring section and the corresponding relation of flow velocity；

Second computing unit, for the corresponding relation of the flow according to the fluid in described measuring section with flow velocity, determines described survey The flow of the fluid in amount section.

Piping flow the most according to claim 9 calculates device, it is characterised in that include a pipe at described measuring section During road, described first computing unit, specifically for:

The property parameters of the fluid in property parameters according to described measuring section and described measuring section, in determining described measuring section The flow of fluid and the corresponding relation of flow velocity；

According to the property parameters of the fluid in described measuring section, determine the Reynolds number of fluid in described measuring section；

According to the property parameters of described measuring section, determine the relative roughness of described measuring section；

According to pressure, the property parameters of described measuring section and the described survey at described measuring section two ends of the fluid in described measuring section The property parameters of the fluid in amount section, determines the pressure drop of described measuring section and the property parameters of described measuring section and described measurement The corresponding relation of the property parameters of the fluid in Duan.

11. piping flows according to claim 10 calculate device, it is characterised in that the described genus according to described measuring section The property parameters of the fluid in property parameter and described measuring section, determines that the flow of fluid in described measuring section is corresponding with flow velocity Relation, specifically includes:

The property parameters of described measuring section includes the internal diameter of the measuring section of described pipeline；

The flow of the fluid in described measuring section and the corresponding relation of flow velocity meet following equation:

$d=18.8{\left(\frac{V_f}{u}\right)}^{0.5}=18.8{\left(\frac{W}{u\mathrm{\&rho;}}\right)}^{0.5};$

Wherein, described d is the internal diameter of measuring section of described pipeline；

Described V_fVolume flow for the fluid in described measuring section；

Described W is the mass flow of the fluid in described measuring section；

Described ρ is the density of the fluid in described measuring section；

Described u is the mean flow rate of the fluid in described measuring section.

12. piping flows according to claim 10 calculate device, it is characterised in that described according in described measuring section The property parameters of fluid, determines the Reynolds number of fluid in described measuring section, specifically includes:

The property parameters of the fluid in described measuring section includes the viscosity of the fluid in described measuring section；

The Reynolds number of the fluid being determined according to the following equation in described measuring section:

Re=du ρ/μ；

Wherein, the Reynolds number of the fluid in described Re is described measuring section；

Described μ is the viscosity of the fluid in described measuring section.

13. piping flows according to claim 10 calculate device, it is characterised in that the described genus according to described measuring section Property parameter, determines the relative roughness of described measuring section, specifically includes:

The property parameters of described measuring section includes the absolute roughness of described measuring section inner tubal wall；

The relative roughness of described measuring section meets following equation:

λ=64/Re, Re < 2300；

$\frac{1}{\sqrt{\mathrm{\&lambda;}}}=1.74-2\lg (\frac{2\mathrm{\&epsiv;}}{d}+\frac{18.7}{\mathrm{Re}\sqrt{\mathrm{\&lambda;}}}),\mathrm{Re}>2300;$

$\mathrm{\&lambda;}=0.0055(1+{\left(\frac{20000\mathrm{\&epsiv;}}{d}+{10}^6/\mathrm{Re}\right)}^{1/3}),4000<\mathrm{Re}<{10}^7;$

Wherein, described λ is the coefficient of friction of described measuring section inner tubal wall；

Described ε is the absolute roughness of described measuring section inner tubal wall.

14. piping flows according to claim 10 calculate device, it is characterised in that the described genus according to described measuring section The property parameters of the fluid in property parameter and described measuring section, determines the pressure drop of described measuring section and the attribute of described measuring section The corresponding relation of the property parameters of the fluid in parameter and described measuring section, specifically includes:

The property parameters of described measuring section includes the equivalent length of the pipe fitting on the length of described measuring section, described measuring section, institute State the level height residing for the two ends of measuring section；

The property parameters of the fluid in described measuring section includes the flow velocity at described measuring section two ends of the fluid in described measuring section；

The property parameters of the fluid in the property parameters of the pressure drop of described measuring section and described measuring section and described measuring section Corresponding relation meets following equation:

Δ P=Δ P_a+ΔP_N+ΔP_f+ΔP_c；

ΔP_a=(Z₂-Z₁)ρg；

${\mathrm{\&Delta;P}}_N=\frac{u_2^2-u_1^2}{2}\mathrm{\&rho;};$

ΔP_c=S_c*V_f ²；

S_c=8344.29*Q_c ^-0.103；

Or,

ΔP_f=(S_PIPE+S_LOCAL)*V_f ²；

$S_{PIPE}=\frac{8\mathrm{\&lambda;}l}{{\mathrm{g\&pi;}}^2{d}^5};$

Or,

${\mathrm{\&Delta;P}}_f=\frac{\mathrm{\&lambda;}L}{D}\&CenterDot;\frac{u^2\mathrm{\&rho;}}{2}=6.26\&times;{10}^4\&CenterDot;\frac{{\mathrm{\&lambda;LV}}_f^2\mathrm{\&rho;}}{d^5}=6.26\&times;{10}^4\&CenterDot;\frac{{\mathrm{\&lambda;LW}}^2}{d^5\mathrm{\&rho;}},\mathrm{Re}>4000;$

${\mathrm{\&Delta;P}}_f=\frac{32\mathrm{\&mu;}ul}{d^2},\mathrm{Re}<2300;$

Wherein, described Δ P is the total pressure drop of described measuring section；

Described Δ P_aStatic pressure for described measuring section drops；

Described Δ P_NVelocity pressure for described measuring section drops；

Described Δ P_fFriction drop for described measuring section；

Described Δ P_cSurface cooler pressure drop for described measuring section.

Described g is acceleration of gravity；

Described Z₂For the level height residing for described measuring section one end, described Z₁Level residing for the described measuring section other end is high Degree；

Described u₂For the mean flow rate of described measuring section one end, described u₂Mean flow rate for the described measuring section other end；

Described Q_cFor surface cooler cold warm water flow；

Described L is the length of described measuring section；

Described Le is the equivalent length of the pipe fitting on described measuring section.

15. piping flows according to claim 9 calculate device, it is characterised in that include a plurality of pipe at described measuring section During road, described first computing unit, specifically for:

The genus of the fluid in every pipeline in property parameters according to every pipeline in described measuring section and described measuring section Property parameter, determine the flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity.

16. piping flows according to claim 15 calculate device, it is characterised in that

The property parameters of every pipeline in described measuring section includes: the impedance of every pipeline in described measuring section, described survey The upper pump lift of every pipeline in amount section；

The property parameters of the fluid in every pipeline in described measuring section includes: the stream in every pipeline in described measuring section Pressure on the body each node in described measuring section；

The flow of fluid in every pipeline in described measuring section and the corresponding relation of flow velocity meet following equation:

$\left\{\begin{array}{c}AG=0\\ A^{T}P=S\&CenterDot;G\left|G\right|-\mathrm{\&Delta;}H\end{array}\right.;$

Wherein, described A is the fundamental interconnection matrix of the pipeline in described measuring section, and A=[a_ij]_n×m, wherein, described n, m are Positive integer, and the number of nodes that n+1 is the pipeline in described measuring section, described m is the number of tubes in described measuring section；And institute State a_ijMeet following equation:

$a_{ij}\left\{\begin{array}{c}1\\ -1\\ 0\end{array}\right.$

Wherein, the fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, and direction is for leaving During node i, a_ij=1；The fluid of the pipeline j in described measuring section is connected with the pipeline node i in described measuring section, and direction is When pointing to node i, a_ij=-1；The fluid of the pipeline j in described measuring section is not attached to the pipeline node i in described measuring section Time, a_ij=0；

Described G is the m rank column vector of each bypass flow, and G=(G₁,G₂,…,G_m)^T；

Described P is the n rank column vector of n node pressure, and P=(P₁,P₂,…,P_n)^T；

Described S is the m rank column vector that each roadlock is anti-, and S=(S₁,S₂,…S_m)^T；

Described Δ H is the m rank column vector of pump lift on each branch road, and Δ H=(Δ H₁, Δ H₂..., Δ H_m)^T；If i-th section of branch road On there is no water pump, then Δ H_i=0.

17. 1 kinds of pipe-line systems, it is characterised in that include that the piping flow as described in any one of claim 9-16 calculates dress Put.