CN113239497B - Method and system for determining inlet setting angle of centrifugal pump impeller - Google Patents
Method and system for determining inlet setting angle of centrifugal pump impeller Download PDFInfo
- Publication number
- CN113239497B CN113239497B CN202110671534.7A CN202110671534A CN113239497B CN 113239497 B CN113239497 B CN 113239497B CN 202110671534 A CN202110671534 A CN 202110671534A CN 113239497 B CN113239497 B CN 113239497B
- Authority
- CN
- China
- Prior art keywords
- inducer
- outlet
- angle
- centrifugal pump
- calculating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000411 inducer Substances 0.000 claims abstract description 161
- 239000007788 liquid Substances 0.000 claims abstract description 54
- 238000004364 calculation method Methods 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims description 27
- 238000010276 construction Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
Abstract
The invention discloses a method and a system for determining an inlet setting angle of an impeller of a centrifugal pump. The method comprises the following steps: constructing an inducer grid model; determining at least three round lines on an outlet surface of the inducer grid model; calculating the inducer outlet liquid flow angle of the round wire by adopting a flow field calculation method; the inlet setting angle of the centrifugal pump impeller is calculated based on the inducer outlet flow angle. The invention enables the inducer and the centrifugal pump impeller to be matched cooperatively, thereby improving the efficiency of the centrifugal pump.
Description
Technical Field
The invention relates to the field of centrifugal pump design, in particular to a method and a system for determining an inlet setting angle of an impeller of a centrifugal pump.
Background
The inducer is one of the main measures for improving the cavitation performance of the centrifugal pump, and has certain working capacity, and can avoid cavitation in the centrifugal pump impeller by improving the liquid pressure at the suction inlet of the impeller, thereby ensuring the stable operation of the pump unit. However, the present lack of a solution for the cooperative matching design between the inducer and the impeller of the centrifugal pump, which makes the inducer installed in front of the impeller, has the following problems: because the impeller inlet setting angle of the centrifugal pump is determined by the impeller inlet flow field structure, after the fluid passes through the front inducer, the fluid has a certain annular quantity, and the annular quantity resets the impeller inlet flow field structure, so that the impeller inlet liquid flow angle deviates from the impeller inlet setting angle in a large range, thereby increasing the impeller inlet attack angle, increasing the inlet attack angle, further increasing the impact loss at the inlet and reducing the efficiency of the centrifugal pump.
Disclosure of Invention
Based on the above, it is necessary to provide a method and a system for determining the inlet setting angle of the centrifugal pump impeller, which determine the inlet setting angle of the centrifugal pump impeller by using the inducer outlet flow field structure, so that the inducer and the centrifugal pump impeller are matched cooperatively, thereby improving the efficiency of the centrifugal pump.
In order to achieve the above object, the present invention provides the following solutions:
a centrifugal pump impeller inlet setting angle determining method comprises the following steps:
constructing an inducer grid model;
determining at least three round lines on an outlet face of the inducer grid model;
calculating an inducer outlet liquid flow angle of the round wire by adopting a flow field calculation method;
and calculating the inlet setting angle of the centrifugal pump impeller based on the inducer outlet liquid flow angle.
Optionally, the constructing an inducer grid model specifically includes:
constructing a variable-pitch inducer three-dimensional model;
performing three-dimensional geometric modeling on an inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model;
and performing grid division on the fluid domain geometric model to obtain the inducer grid model.
Optionally, the determining at least three round lines on the outlet face of the inducer grid model specifically includes:
determining a first round wire, a second round wire and a third round wire on an outlet face of the inducer grid model; the first round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a first set distance from the hub; the second round line is a streamline positioned in the middle of the outlet face of the inducer grid model; the third round line is a streamline which is positioned on the outlet face of the inducer grid model and is at a second set distance from the rim.
Optionally, the calculating the inducer outlet liquid flow angle of the circular line by using a flow field calculating method specifically includes:
setting boundary conditions;
selecting a set number of points on the circular line;
calculating the circumferential sub-speed and the axial speed of each point by adopting a flow field calculation method based on the boundary condition;
calculating an outlet flow angle at a corresponding point from the circumferential component velocity and the axial velocity;
and calculating the average value of the outlet liquid flow angles of all points on the circular line to obtain the inducer outlet liquid flow angle.
Optionally, the calculating the inlet setting angle of the centrifugal pump impeller based on the inducer outlet liquid flow angle specifically includes:
and calculating the inlet setting angle of the centrifugal pump impeller by the inducer outlet liquid flow angle and the attack angle.
The invention also provides a system for determining the inlet setting angle of the centrifugal pump impeller, which comprises the following steps:
the model construction module is used for constructing an inducer grid model;
the round wire determining module is used for determining at least three round wires on the outlet face of the inducer grid model;
the liquid flow angle calculation module is used for calculating the inducer outlet liquid flow angle of the circular line by adopting a flow field calculation method;
and the setting angle calculation module is used for calculating the setting angle of the inlet of the centrifugal pump impeller based on the inducer outlet liquid flow angle.
Optionally, the model building module specifically includes:
the first construction unit is used for constructing a variable-pitch inducer three-dimensional model;
the second construction unit is used for carrying out three-dimensional geometric modeling on the inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model;
the dividing unit is used for carrying out grid division on the fluid domain geometric model to obtain the inducer grid model.
Optionally, the round wire determining module specifically includes:
a round wire determining unit for determining a first round wire, a second round wire and a third round wire on an outlet face of the inducer grid model; the first round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a first set distance from the hub; the second round line is a streamline positioned in the middle of the outlet face of the inducer grid model; the third round line is a streamline which is positioned on the outlet face of the inducer grid model and is at a second set distance from the rim.
Optionally, the flow angle calculating module specifically includes:
a boundary condition setting unit configured to set a boundary condition;
a selecting unit for selecting a set number of points on the circular line;
the first calculation unit is used for calculating the circumferential sub-speed and the axial speed of each point by adopting a flow field calculation method based on the boundary condition;
a second calculation unit for calculating an outlet flow angle of a corresponding point from the circumferential partial velocity and the axial velocity;
and the third calculation unit is used for calculating the average value of the outlet liquid flow angles of all points on the circular line to obtain the inducer outlet liquid flow angle.
Optionally, the setting angle calculating module specifically includes:
and the setting angle calculating unit is used for calculating the setting angle of the impeller inlet of the centrifugal pump by the liquid flow angle and the attack angle of the inducer outlet.
Compared with the prior art, the invention has the beneficial effects that:
the embodiment of the invention provides a method and a system for determining the inlet setting angle of an impeller of a centrifugal pump, wherein the inlet setting angle of the impeller of the centrifugal pump is calculated by calculating the inducer outlet liquid flow angle of a round line on the outlet surface of an inducer grid model. The inducer outlet flow field structure is used for setting the inlet of the centrifugal pump impeller, so that the inducer and the centrifugal pump impeller are matched cooperatively, and the efficiency of the centrifugal pump is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pump configuration with inducer positioned in front of centrifugal pump impeller;
FIG. 2 is a flow chart of a method for determining the inlet setting angle of an impeller of a centrifugal pump according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a three-dimensional model of a variable pitch inducer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a fluid domain geometry model according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an inducer mesh model according to an embodiment of the present invention;
FIG. 6 is a schematic view of three circular line positions according to an embodiment of the present invention;
FIG. 7 is an angular distribution of outlet flow angles for three circular lines provided in an embodiment of the present invention;
fig. 8 is a block diagram of a centrifugal pump impeller inlet setting angle determination system provided by an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the placement of inducer 2 before centrifugal pump impeller 1 improves the cavitation performance of the centrifugal pump. However, the improvement of cavitation performance generally comes at the cost of partial efficiency of the centrifugal pump device, on one hand, cavitation occurs in the inducer flow channel, hydraulic loss increases, and on the other hand, the inducer adopts a low hub ratio large wrap angle axial flow structure, the inducer itself is low in efficiency, and the inducer is a main reason for ensuring cavitation performance and sacrificing efficiency.
The inducer is widely applied to the field of aviation, the high-altitude performance of an airplane is an important performance index, the problem of high-altitude cavitation performance of a centrifugal pump is an important way for solving the problem of high-altitude performance, and the cavitation performance and efficiency of the current aviation fuel pump in the high-altitude state are important factors for restricting the further development of aviation technology. High cavitation performance and high efficiency are the development direction of related industrial pump products in the future.
Installing inducer before centrifugal pump impeller also causes the following problems:
1) The inlet attack angle of the impeller is increased, and the impact loss at the inlet is increased when the inlet attack angle is increased, so that the efficiency of the centrifugal pump is reduced;
2) The inducer has obvious cavitation phenomenon, the internal flow field structure is complicated and disordered, the efficiency is lower and difficult to estimate, the inducer has fewer blades, the capability of controlling the movement direction of fluid is limited, and the inducer outlet liquid flow angle deviates from the inducer outlet setting angle, so that the inducer outlet speed triangle has larger deviation from a theoretical design value, and the inducer outlet (centrifugal pump impeller inlet) speed triangle is difficult to accurately calculate from the theoretical design.
An increase in the impact loss at the inlet of the impeller of the centrifugal pump not only reduces the pump efficiency, but also affects the cavitation performance of the pump. At present, under the condition that the centrifugal pump impeller exists and cannot meet cavitation requirements, a front inducer is selected and arranged, and a cooperative and matched design is lacked between the inducer and the impeller. The inducer and the main pump impeller are reasonably and cooperatively designed, so that the pump efficiency can be improved, the cavitation performance of the pump can be properly improved, and the method has great significance in developing the high-efficiency pump with high cavitation performance. However, as can be seen from the above 2), it is difficult to predict the inducer outlet flow field structure theoretically due to the complexity of the flow inside the inducer, so that it is difficult to accurately realize the cooperative design of the inducer and the impeller simply from the theoretical design.
The numerical simulation technology is widely applied in the industrial field along with the development of computer science, and in view of the fact that the theoretical design cannot accurately obtain the inducer outlet speed triangle, the inducer outlet flow field structure can be obtained by adopting a numerical simulation method, and further the impeller inlet setting condition is determined based on the inducer outlet flow field structure, so that the cooperative design of the inducer and the impeller is realized.
The method for determining the inlet setting angle of the centrifugal pump impeller provided by the embodiment of the invention uses the flow of 360m 3 And/h, the rotating speed is 2950RPM, the inducer design with cavitation allowance smaller than or equal to 3.2m is required, the inlet diameter of the impeller is 176mm, and the diameter of the hub is 65 mm.
Fig. 2 is a flowchart of a method for determining an inlet setting angle of an impeller of a centrifugal pump according to an embodiment of the present invention.
Referring to fig. 2, the method for determining the inlet setting angle of the centrifugal pump impeller provided in the present embodiment includes:
step 101: and constructing an inducer grid model.
The step 101 specifically includes:
constructing a variable-pitch inducer three-dimensional model; performing three-dimensional geometric modeling on an inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model; and performing grid division on the fluid domain geometric model to obtain the inducer grid model.
In practical application, the construction flow of the inducer grid model is as follows: designing an inducer by adopting a traditional variable-pitch inducer design method to obtain a variable-pitch inducer three-dimensional model, as shown in figure 3; then performing three-dimensional geometric modeling on an inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model, as shown in fig. 4; performing tetrahedral mesh division on the fluid domain geometric model by using ICEM software to obtain an inducer mesh model, as shown in FIG. 5; and setting boundary conditions, namely carrying out cavitation numerical simulation calculation on an inducer calculation domain by adopting an RNG k-epsilon turbulence model, wherein the specific setting of the boundary conditions is shown in table 1.
TABLE 1 boundary condition settings
Step 102: at least three circular lines are defined on the exit face of the inducer mesh model. Specifically, at least three circular lines with different radiuses are taken at the inducer outlet position of the inducer grid model by taking a point on the pump axis as the center of a circle.
In this embodiment, three round lines are taken as an example, as shown in fig. 6, a first round line a, a second round line b and a third round line c are determined on the outlet face of the inducer grid model; the first round line a is a streamline which is positioned on the outlet surface of the inducer grid model and is at a first set distance from the hub; the second round line b is a streamline positioned in the middle of the outlet surface of the inducer grid model; the third round line c is a streamline which is positioned on the outlet face of the inducer grid model and is at a second set distance from the rim.
The radius of the first round line a is r a The radius of the second round line b is r b The radius of the third round line c is r c ，r a ＝0.9(r 2 -r h )+r h ；r b ＝0.5(r 2 -r h )+r h ；r c ＝0.1(r 2 -r h )+r h . Wherein r is 2 Taking the radius of the inlet of the impeller of the centrifugal pump as 88mm for the radius of the outer edge of the inducer outlet; r is (r) h For inducer outlet hub radius, here the centrifugal pump impeller inlet hub radius is taken to be 32.5mm.
Step 103: and calculating the inducer outlet liquid flow angle of the round wire by adopting a flow field calculation method.
The step 103 specifically includes:
1) Selecting a set number of points on the circular line; calculating the circumferential sub-speed and the axial speed of each point by adopting a flow field calculation method based on the boundary condition; the outlet flow angle at the corresponding point is calculated from the circumferential component velocity and the axial velocity.
Specifically, 200 points are selected on the first circular line a, the second circular line b and the third circular line c respectively, and the circumferential direction partial velocity of the ith point position is read through the flow field calculation resultAxial speed->And the outlet flow angle +.>Wherein:
u 2 the angular distribution of the outlet flow angles of the three circular lines for the circumferential velocity at the corresponding positions of the inducer outlet is shown in FIG. 7.
As can be seen from FIG. 7, since the inducer has a limited number of blades, the fluid cannot flow exactly along the blade's bone line direction, so there is a certain deviation between the fluid flow angle and the inducer outlet angle, and the cavitation in the inducer complicates and makes it difficult to predict the inducer internal flow field structure, so the deviation between the outlet flow angle and the outlet angle is greater, and the rim and the middle streamline positionThe flow field structure at the hub position is disordered and the unsteady characteristic is obvious by taking 360/z (z is the number of blades) as periodic distribution.
2) And calculating the average value of the outlet liquid flow angles of all points on the circular line to obtain the inducer outlet liquid flow angle. The average value of the outlet liquid flow angles of all points on the three circular lines is obtained respectively, and the inducer outlet liquid flow angle corresponding to the first circular line, the inducer outlet liquid flow angle corresponding to the second circular line and the inducer outlet liquid flow angle corresponding to the third circular line are obtained.
Specifically, for all cylindrical surfaces where different circular lines are locatedThe weighted average calculation is performed with respect to the corresponding circumference, since 200 points on each circle line are uniformly taken, the +.>And (3) summing and dividing by 200 to obtain the average value of the outlet liquid flow angles of all points on each circular line, wherein the calculation formula is as follows:
is the average of the outlet flow angles at all points on the circle.
The average value of the outlet liquid flow angles of all points on the first circular line, namely the calculation formula of the inducer outlet liquid flow angle corresponding to the first circular line is as follows:(theoretical design value 18.7 °).
The average value of the outlet liquid flow angles of all points on the second circular line, namely the calculation formula of the outlet liquid flow angles of the inducer corresponding to the second circular line is as follows(theoretical design 22.4 °).
The average value of the outlet liquid flow angles of all points on the third circular line, namely the calculation formula of the outlet liquid flow angles of the inducer corresponding to the third circular line is(theoretical design value 37.1 °).
Step 104: and calculating the inlet setting angle of the centrifugal pump impeller based on the inducer outlet liquid flow angle. Specifically, the inlet setting angle of the centrifugal pump impeller is calculated by the inducer outlet flow angle and the attack angle.
In practical application, the specific calculation process is as follows:
determining the impeller at r a 、r b R c Radial position centrifugal pump impeller inlet setting angle beta 3a 、β 3b Beta and beta 3c Wherein, the method comprises the steps of, wherein,
β 3a ＝β 3a ′+α；
β 3b ＝β 3b ′+α；
β 3c ＝β 3c +α；
β 3a ′、β 3b ' beta 3c ' centrifugal pump impeller inlet radius r respectively a 、r b R c The corresponding liquid flow angle at the position, alpha is an attack angle, alpha is selected empirically, the range of the alpha is (3-12 degrees), and the inlet liquid flow angle of the impeller of the centrifugal pump is equal to the outlet liquid flow angle of the inducer, namely:
and then, the following steps are obtained:
β 3a 、β 3b beta and beta 3c Centrifugal pumps respectivelyThe radius of the impeller inlet is r a 、r b R c The centrifugal pump impeller inlet setting angle at the location.
And determining the inlet setting angle of the corresponding position of the inlet of the centrifugal pump according to the calculation result, thereby realizing the collaborative matching design of the inducer and the centrifugal pump.
The method for determining the inlet setting angle of the centrifugal pump impeller solves the technical problems that in the prior art, an inducer is reset to a flow field structure, the inlet attack angle of the centrifugal pump is increased, the efficiency is reduced, and the traditional design method cannot accurately determine the outlet liquid flow angle of the inducer, so that the efficiency of a unit cannot be effectively improved due to the fact that the inlet speed triangle of the centrifugal pump cannot be accurately determined.
The invention also provides a system for determining the inlet setting angle of the centrifugal pump impeller, and fig. 8 is a structural diagram of the system for determining the inlet setting angle of the centrifugal pump impeller provided by the embodiment of the invention.
Referring to fig. 8, the centrifugal pump impeller inlet setting angle determination system of the present embodiment includes:
the model construction module 201 is configured to construct an inducer mesh model.
A round wire determination module 202 for determining at least three round wires on an exit face of the inducer mesh model.
And the liquid flow angle calculation module 203 is used for calculating the inducer outlet liquid flow angle of the circular line by adopting a flow field calculation method.
A setting angle calculation module 204 for calculating a centrifugal pump impeller inlet setting angle based on the inducer outlet flow angle.
As an alternative embodiment, the model building module 201 specifically includes:
the first construction unit is used for constructing a variable-pitch inducer three-dimensional model.
And the second construction unit is used for carrying out three-dimensional geometric modeling on the inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model.
The dividing unit is used for carrying out grid division on the fluid domain geometric model to obtain the inducer grid model.
As an optional embodiment, the round wire determining module 202 specifically includes:
a round wire determining unit for determining a first round wire, a second round wire and a third round wire on an outlet face of the inducer grid model; the first round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a first set distance from the hub; the second round line is a streamline positioned in the middle of the outlet face of the inducer grid model; the third round line is a streamline which is positioned on the outlet face of the inducer grid model and is at a second set distance from the rim.
As an alternative embodiment, the flow angle calculating module 203 specifically includes:
and a boundary condition setting unit configured to set a boundary condition.
And the selecting unit is used for selecting a set number of points on the circular line.
And the first calculation unit is used for calculating the circumferential partial velocity and the axial velocity of each point by adopting a flow field calculation method based on the boundary condition.
And a second calculation unit for calculating an outlet flow angle of the corresponding point from the circumferential partial velocity and the axial velocity.
And the third calculation unit is used for calculating the average value of the outlet liquid flow angles of all points on the circular line to obtain the inducer outlet liquid flow angle.
As an optional implementation manner, the setting angle calculating module 204 specifically includes:
and the setting angle calculating unit is used for calculating the setting angle of the impeller inlet of the centrifugal pump by the liquid flow angle and the attack angle of the inducer outlet.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A method for determining the inlet setting angle of an impeller of a centrifugal pump, comprising:
constructing an inducer grid model;
determining at least three round lines on an outlet face of the inducer grid model;
calculating an inducer outlet liquid flow angle of the round wire by adopting a flow field calculation method;
calculating an inlet setting angle of an impeller of the centrifugal pump based on the inducer outlet flow angle;
determining at least three round lines on an outlet face of the inducer grid model, wherein the method specifically comprises the following steps of:
determining a first round wire, a second round wire and a third round wire on an outlet face of the inducer grid model; the first round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a first set distance from the hub; the second round line is a streamline positioned in the middle of the outlet face of the inducer grid model; the third round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a second set distance from the rim;
calculating the inducer outlet liquid flow angle of the circular line by adopting a flow field calculation method, and specifically comprising the following steps:
setting boundary conditions;
selecting a set number of points on the circular line;
calculating the circumferential sub-speed and the axial speed of each point by adopting a flow field calculation method based on the boundary condition;
calculating an outlet flow angle at a corresponding point from the circumferential component velocity and the axial velocity;
and calculating the average value of the outlet liquid flow angles of all points on the circular line to obtain the inducer outlet liquid flow angle.
2. The method for determining the inlet setting angle of the centrifugal pump impeller according to claim 1, wherein the constructing an inducer grid model specifically comprises:
constructing a variable-pitch inducer three-dimensional model;
performing three-dimensional geometric modeling on an inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model;
and performing grid division on the fluid domain geometric model to obtain the inducer grid model.
3. The method for determining the inlet setting angle of the centrifugal pump impeller according to claim 1, wherein the calculating the inlet setting angle of the centrifugal pump impeller based on the inducer outlet flow angle comprises:
and calculating the inlet setting angle of the centrifugal pump impeller by the inducer outlet liquid flow angle and the attack angle.
4. A centrifugal pump impeller inlet setting angle determination system, comprising:
the model construction module is used for constructing an inducer grid model;
the round wire determining module is used for determining at least three round wires on the outlet face of the inducer grid model;
the liquid flow angle calculation module is used for calculating the inducer outlet liquid flow angle of the circular line by adopting a flow field calculation method;
the setting angle calculation module is used for calculating the setting angle of the inlet of the centrifugal pump impeller based on the inducer outlet liquid flow angle;
the round wire determining module specifically comprises:
a round wire determining unit for determining a first round wire, a second round wire and a third round wire on an outlet face of the inducer grid model; the first round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a first set distance from the hub; the second round line is a streamline positioned in the middle of the outlet face of the inducer grid model; the third round line is a streamline which is positioned on the outlet surface of the inducer grid model and is at a second set distance from the rim;
the liquid flow angle calculation module specifically comprises:
a boundary condition setting unit configured to set a boundary condition;
a selecting unit for selecting a set number of points on the circular line;
the first calculation unit is used for calculating the circumferential sub-speed and the axial speed of each point by adopting a flow field calculation method based on the boundary condition;
a second calculation unit for calculating an outlet flow angle of a corresponding point from the circumferential partial velocity and the axial velocity;
and the third calculation unit is used for calculating the average value of the outlet liquid flow angles of all points on the circular line to obtain the inducer outlet liquid flow angle.
5. The centrifugal pump impeller inlet setting angle determination system of claim 4, wherein the model building module specifically comprises:
the first construction unit is used for constructing a variable-pitch inducer three-dimensional model;
the second construction unit is used for carrying out three-dimensional geometric modeling on the inducer fluid domain of the variable-pitch inducer three-dimensional model to obtain a fluid domain geometric model;
the dividing unit is used for carrying out grid division on the fluid domain geometric model to obtain the inducer grid model.
6. The centrifugal pump impeller inlet setting angle determination system according to claim 4, wherein the setting angle calculation module specifically comprises:
and the setting angle calculating unit is used for calculating the setting angle of the impeller inlet of the centrifugal pump by the liquid flow angle and the attack angle of the inducer outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110671534.7A CN113239497B (en) | 2021-06-17 | 2021-06-17 | Method and system for determining inlet setting angle of centrifugal pump impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110671534.7A CN113239497B (en) | 2021-06-17 | 2021-06-17 | Method and system for determining inlet setting angle of centrifugal pump impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113239497A CN113239497A (en) | 2021-08-10 |
| CN113239497B true CN113239497B (en) | 2024-03-26 |
Family
ID=77140282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110671534.7A Active CN113239497B (en) | 2021-06-17 | 2021-06-17 | Method and system for determining inlet setting angle of centrifugal pump impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113239497B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100021308A (en) * | 2008-08-14 | 2010-02-24 | 한국생산기술연구원 | Method and system for designing impeller of centrifugal and mixed flow pump |
| CN102705263A (en) * | 2012-06-21 | 2012-10-03 | 江苏大学 | Optimal design method for inducer with varying pitch of centrifugal pump |
| CN104047890A (en) * | 2014-07-25 | 2014-09-17 | 江苏大学 | Design method of axial flow type low-lift prepositioned inducer |
| CN109684664A (en) * | 2018-11-21 | 2019-04-26 | 中国电力科学研究院有限公司 | A kind of fining Meshing Method and system for conducting wire flow field simulation |
| CN112901502A (en) * | 2021-03-16 | 2021-06-04 | 兰州理工大学 | Method for setting mounting angle of inlet of spatial guide vane of axial flow pump |
-
2021
- 2021-06-17 CN CN202110671534.7A patent/CN113239497B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100021308A (en) * | 2008-08-14 | 2010-02-24 | 한국생산기술연구원 | Method and system for designing impeller of centrifugal and mixed flow pump |
| CN102705263A (en) * | 2012-06-21 | 2012-10-03 | 江苏大学 | Optimal design method for inducer with varying pitch of centrifugal pump |
| CN104047890A (en) * | 2014-07-25 | 2014-09-17 | 江苏大学 | Design method of axial flow type low-lift prepositioned inducer |
| CN109684664A (en) * | 2018-11-21 | 2019-04-26 | 中国电力科学研究院有限公司 | A kind of fining Meshing Method and system for conducting wire flow field simulation |
| CN112901502A (en) * | 2021-03-16 | 2021-06-04 | 兰州理工大学 | Method for setting mounting angle of inlet of spatial guide vane of axial flow pump |
Non-Patent Citations (1)
| Title |
|---|
| 单喷嘴冲击式气动旋转驱动器的三维流场数值模拟;田威;李小宁;;液压与气动(第03期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113239497A (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhu et al. | Optimization design of a reversible pump–turbine runner with high efficiency and stability | |
| US20160342730A1 (en) | Method for designing centrifugal pump and mixed flow pump having specific speed of 150-1200 | |
| CN106446324B (en) | Design method of final-stage twisted blade of large industrial steam turbine | |
| Bing et al. | Multi-parameter optimization design, numerical simulation and performance test of mixed-flow pump impeller | |
| JP2000515944A (en) | Turbomachine and manufacturing method thereof | |
| CN110321660B (en) | Design method of large-scale mixed-flow pump impeller capable of discharging water radially | |
| CN107092763B (en) | Method for three-dimensional design of turbomachinery impeller with castability | |
| CN113111453B (en) | Numerical simulation simplifying method for drag reduction performance of micro-texture of rotating blade | |
| CN103883556B (en) | A kind of design method of axial flow runner | |
| CN113239497B (en) | Method and system for determining inlet setting angle of centrifugal pump impeller | |
| Zhang et al. | Influence of blade profiles on plastic centrifugal pump performance | |
| CN113553671A (en) | Bionic anti-cavitation axial flow impeller design method | |
| CN110608191B (en) | Blade design method based on Orson vortex and blade pump designed by blade design method | |
| CN111400941A (en) | Numerical prediction method for internal reflux and reflux vortex cavitation of vane pump | |
| Miao et al. | Study on energy conversion characteristics in volute of pump as turbine | |
| Jiao et al. | Analysis of the influence of inlet guide vanes on the performance of shaft tubular pumps | |
| CN113339267B (en) | Cambered high-energy-density blade design method and vane pump designed by same | |
| CN106971019B (en) | Hydraulic design method for guide vane of high-specific-speed axial flow pump | |
| CN115438441A (en) | Centrifugal compressor impeller quasi-three-dimensional design method based on inverse design algorithm | |
| Shi et al. | Optimal design of multi-conditions for axial flow pump | |
| CN114169103A (en) | Propeller modeling method and system based on large propeller disc load working condition | |
| Hong et al. | Numerical optimal design of impeller back pump-out vanes on axial thrust in centrifugal pumps | |
| Sekino et al. | Numerical analysis of design and off-design performance of high specific speed mixed flow pumps | |
| CN114117667A (en) | Method for designing anti-cavitation centrifugal pump impeller | |
| Bing et al. | Effects of blade rotation angle deviations on mixed-flow pump hydraulic performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |