CN116305669B - Method, device, equipment and medium for acquiring design parameters of axial flow impeller - Google Patents

Method, device, equipment and medium for acquiring design parameters of axial flow impeller Download PDF

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CN116305669B
CN116305669B CN202310559511.6A CN202310559511A CN116305669B CN 116305669 B CN116305669 B CN 116305669B CN 202310559511 A CN202310559511 A CN 202310559511A CN 116305669 B CN116305669 B CN 116305669B
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blade
channel
area
inlet
throat
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CN116305669A (en
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李强
孔升旭
魏征
刘驰
郝帅
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Shaanxi Aerospace Information Technology Co ltd
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Shaanxi Aerospace Information Technology Co ltd
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    • G06F30/27—Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract

The embodiment of the invention discloses a method, a device, equipment and a medium for acquiring design parameters of an axial flow impeller; the acquisition method comprises the following steps: dividing two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions; calculating the area of the inlet of the blade channel based on the blade profile sections at the plurality of different positions; calculating the area of the blade channel outlet based on the blade profile sections at the different positions; and calculating to obtain the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel.

Description

Method, device, equipment and medium for acquiring design parameters of axial flow impeller
Technical Field
The embodiment of the invention relates to the technical field of axial flow impellers, in particular to a method, a device, equipment and a medium for acquiring design parameters of an axial flow impeller.
Background
In an axial-flow impeller machine structure, a plurality of design parameters are generally involved, and a certain correlation exists between the design parameters, so that when one or several of the design parameters change or do not meet the design requirements, repeated adjustment of the design work of the whole axial-flow impeller machine structure is most likely to be caused. For example, the throat of the blade has considerable engineering significance for fluid flow regulation and kinetic energy loss, so that in order to achieve flow control and kinetic energy regulation required by design, the calculation accuracy of the throat area is very important, mainly because reasonable design parameters can be reversely deduced through the calculation result of the throat area. The throat area refers to a portion with the smallest cross-sectional area in the process of flowing fluid from the inlet of the vane passage to the outlet of the vane passage. However, the current method for calculating the throat area is affected by factors such as smooth torsion, non-uniformity, irregular blade shape and the like in an actual scene, and it is difficult to calculate the accurate throat area. Therefore, in actual test, design parameters such as flow rate at the throat and average flow rate in the channel are not in accordance with design requirements due to the fact that the calculation accuracy of the throat area is not up to standard often, so that technicians are required to repeatedly adjust the calculation of the throat area, and other design size parameters and the like still need to be repeatedly adjusted after the calculation of the throat area, so that design and experiment periods are greatly prolonged, and production cost is difficult to control.
Disclosure of Invention
In view of this, the embodiments of the present invention are expected to provide a method, apparatus, device, and medium for obtaining design parameters of an axial flow impeller; the calculation accuracy of the throat area can be improved, so that other design parameters of the axial flow impeller are reversely deduced based on the calculation result of the throat area, efficient and accurate direction adjustment guidance is provided for technicians, the design accuracy of the integral impeller is improved, and the design period is shortened.
The technical scheme of the embodiment of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for acquiring an axial flow impeller design parameter, where the method includes:
dividing two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
calculating the area of the inlet of the blade channel based on the blade profile sections at the plurality of different positions;
calculating the area of the blade channel outlet based on the blade profile sections at the different positions;
and calculating to obtain the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel.
Optionally, in some possible embodiments, the calculating, based on the blade profile sections at the plurality of different positions, an area of the inlet of the blade channel includes:
Drawing tangent lines from the front edge end point of each section divided by the first blade to the direction of the pressure surface of the second blade to form a plurality of first tangent curves;
sequentially connecting a front edge line of each section on the first blade with the corresponding first tangent line curve to form a plurality of first curved surfaces;
and calculating the area of each first curved surface, and obtaining the area of the inlet of the blade channel formed by a plurality of first curved surfaces based on the area of the first curved surfaces.
Optionally, in some possible embodiments, the calculating, based on the blade profile sections of the plurality of different positions, an area of a blade channel outlet includes:
drawing tangents from the tail edge end point of each section divided by the second blade to the suction surface direction of the first blade to form a plurality of second tangent curves;
sequentially connecting a tail edge line of each section on the second blade with the corresponding second tangent line curve to form a plurality of second curved surfaces;
and calculating the area of each second curved surface, and obtaining the area of a blade channel outlet formed by a plurality of second curved surfaces based on the area of the second curved surfaces.
Optionally, in some possible embodiments, the calculating to obtain the throat area according to the area of the inlet of the vane channel and the area of the outlet of the vane channel includes:
Based on the area A0 of the vane channel inlet and the area A1 of the vane channel outlet, the throat area A is obtained according to the following formula:
wherein A represents the throat area; a0 represents the area of the inlet of the vane passage; a1 represents the area of the blade channel outlet; h0 represents the average radius of curvature of the suction side of the first blade; h1 represents the average radius of curvature of the first blade pressure surface.
Optionally, in some possible embodiments, the acquiring method further includes:
based on the throat area and the preset flow velocity at the throat, calculating according to the following formula to obtain the flow at the throat:
wherein Q is t Representing the flow at the throat; vt represents the flow rate at the throat;
based on the flow at the throat, an average flow within the channel is obtained according to the following equation:
wherein Qavg represents the average flow in the channel; q (Q) in Representing the flow at the inlet of the vane passage,a0 represents the area of the inlet of the blade channel; v0 represents the flow rate at the inlet of the vane passage; q (Q) out Representing the flow at the outlet of said vane passage, < >>A1 represents the area of the blade channel outlet; v1 represents the flow rate at the outlet of the vane passage; f represents a channel speed attenuation factor, and f is more than or equal to 0 and less than or equal to 1.0; d represents the channel length; d1 represents the length of the vane passage from the inlet to the throat; / >An air flow angle representing the inlet of the vane passage; />An air flow angle representing the outlet of the vane passage;indicating the blade mounting angle.
Optionally, in some possible embodiments, the acquiring method further includes:
collecting multiple groups of data sets and dividing the multiple groups of data sets into a data training set and a data verification set according to a set proportion; wherein the data set comprises known design parameters, the throat area A, the flow rate Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And an average flow rate Qavg within the channel; wherein the known design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; air flow angle of channel inletThe method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of channel outlet- >Blade mounting angle +.>；
Sequentially inputting a plurality of groups of data training sets into an initial autonomous learning machine model to train the initial autonomous learning machine model to obtain a trained autonomous learning machine model;
sequentially inputting a plurality of groups of data verification sets into the trained autonomous learning machine model to verify the trained autonomous learning machine model;
setting the throat area A and the flow Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out The average flow Qavg in the channel is input into the autonomous learning machine model with the completed verification, and the output of the autonomous learning machine model with the completed verification is obtained, so that the adaptive design parameters are obtained; wherein the adaptive design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; airflow angle at inlet of vane channel The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of blade channel outlet ∈>Blade mounting angle +.>。
In a second aspect, an embodiment of the present invention provides an acquiring apparatus for an axial flow impeller design parameter, the acquiring apparatus including a dividing portion, a first acquiring portion, a second acquiring portion, and a third acquiring portion; wherein,,
the dividing part is configured to divide two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
the first acquisition part is configured to calculate and obtain the area of the inlet of the blade channel based on the blade profile sections at the plurality of different positions;
the second acquisition part is configured to calculate and obtain the area of the blade channel outlet based on the blade profile sections of the plurality of different positions;
the third obtaining part is configured to calculate and obtain the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel.
Optionally, in some examples, the first acquisition portion is configured to:
drawing tangent lines from the front edge end point of each section divided by the first blade to the direction of the pressure surface of the second blade to form a plurality of first tangent curves;
sequentially connecting a front edge line of each section on the first blade with the corresponding first tangent line curve to form a plurality of first curved surfaces;
And calculating the area of each first curved surface, and obtaining the area of the inlet of the blade channel formed by a plurality of first curved surfaces based on the area of the first curved surfaces.
Optionally, in some examples, the first acquisition portion is configured to:
drawing tangents from the tail edge end point of each section divided by the second blade to the suction surface direction of the first blade to form a plurality of second tangent curves;
sequentially connecting a tail edge line of each section on the second blade with the corresponding second tangent line curve to form a plurality of second curved surfaces;
and calculating the area of each second curved surface, and obtaining the area of a blade channel outlet formed by a plurality of second curved surfaces based on the area of the second curved surfaces.
Optionally, in some examples, the third acquisition portion is configured to:
based on the area A0 of the inlet of the blade channel and the area A1 of the outlet of the channel, the throat area A is obtained according to the following formula:
wherein A represents the throat area; a0 represents the area of the inlet of the vane passage; a1 represents the area of the blade channel outlet; h0 represents the average radius of curvature of the suction side of the first blade; h1 represents the average radius of curvature of the first blade pressure surface.
Optionally, in some examples, the acquisition device further comprises a fourth acquisition portion configured to:
based on the throat area and the preset flow velocity at the throat, calculating according to the following formula to obtain the flow at the throat:
wherein Q is t Representing the flow at the throat; vt represents the flow rate at the throat;
based on the flow at the throat, an average flow within the channel is obtained according to the following equation:
wherein Qavg represents the average flow in the channel; q (Q) in Representing the flow at the inlet of the vane passage,a0 represents the area of the inlet of the blade channel; v0 represents the flow rate at the inlet of the vane passage; q (Q) out Representing the flow at the outlet of said vane passage, < >>A1 represents the area of the blade channel outlet; v1 represents the flow rate at the outlet of the vane passage; f represents a channel speed attenuation factor, and f is more than or equal to 0 and less than or equal to 1.0; d represents the channel length; d1 represents the length of the vane passage from the inlet to the throat; />An air flow angle representing the inlet of the vane passage; />An air flow angle representing the outlet of the vane passage;indicating the blade mounting angle.
Optionally, in some examples, the acquisition device further comprises a machine learning portion configured to:
Collecting multiple groups of data sets and dividing the multiple groups of data sets into a data training set and a data verification set according to a set proportion; wherein the data set comprises known design parameters, the throat area A, the flow rate Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And an average flow rate Qavg within the channel; wherein the known design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; air flow angle of channel inletThe method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of channel outlet->Blade mounting angle +.>；
Sequentially inputting a plurality of groups of data training sets into an initial autonomous learning machine model to train the initial autonomous learning machine model to obtain a trained autonomous learning machine model;
Sequentially inputting a plurality of groups of data verification sets into the trained autonomous learning machine model to verify the trained autonomous learning machine model;
setting the throat area A and the flow Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out Average flow within the channelInputting the quantity Qavg into the verified autonomous learning machine model, and obtaining the output of the verified autonomous learning machine model to obtain adaptive design parameters; wherein the adaptive design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; airflow angle at inlet of vane channelThe method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of blade channel outlet ∈>Blade mounting angle +. >。
In a third aspect, an embodiment of the present invention provides an apparatus for acquiring design parameters of an axial flow impeller, the apparatus comprising: a communication interface, a memory and a processor; the components are coupled together by a bus system; wherein,,
the communication interface is used for receiving and transmitting signals in the process of receiving and transmitting information with other external network elements;
the memory is used for storing a computer program capable of running on the processor;
the processor is configured to execute the method steps of obtaining the design parameters of the axial flow impeller of the first aspect when the computer program is executed.
In a fourth aspect, an embodiment of the present invention provides a medium storing a program for acquiring an axial flow impeller design parameter, where the program for acquiring an axial flow impeller design parameter implements the steps of the method for acquiring an axial flow impeller design parameter according to the first aspect when executed by at least one processor.
The embodiment of the invention provides a method, a device, equipment and a medium for acquiring design parameters of an axial flow impeller; dividing two adjacent blades along the height direction of the blades to obtain blade profile sections at a plurality of different positions; then calculating and obtaining the area of the inlet of the blade channel and the area of the outlet of the blade channel based on the blade profile sections at the different positions; thereby obtaining the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel. According to the technical scheme provided by the embodiment of the invention, the influence of the blade profile on the accurate calculation of the throat area is fully considered, the influence of the blade profile change and torsion on the throat area calculation accuracy is reduced, and the design accuracy of the axial flow impeller is further improved.
Drawings
FIG. 1 is a schematic flow chart of a method for obtaining design parameters of an axial flow impeller according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cross-sectional division of a blade according to an embodiment of the present invention;
FIG. 3 is a schematic view of forming multiple curved surfaces at a channel inlet and a channel outlet according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a curved surface according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an apparatus for obtaining design parameters of an axial flow impeller according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating an apparatus for obtaining design parameters of an axial flow impeller according to another embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating an apparatus for obtaining design parameters of an axial flow impeller according to another embodiment of the present invention;
fig. 8 is a schematic diagram of a specific hardware structure of an apparatus for obtaining design parameters of an axial flow impeller according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, a method for obtaining design parameters of an axial flow impeller according to an embodiment of the present invention is shown, where the method specifically includes:
S101, dividing two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
s102, calculating and obtaining the area of the inlet of the blade channel based on the blade profile sections at the different positions;
s103, calculating and obtaining the area of the blade channel outlet based on the blade profile sections at the different positions;
s104, calculating to obtain the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel.
In the existing calculation method, the throat area is generally calculated by the following formula:
wherein A represents throat area; q represents the inlet and outlet flow of the blade; r represents the average radius of the axial flow impeller; n represents the rotational speed of the axial flow impeller; c represents the number of blades.
In addition, in some conventional hydrodynamic calculation formulas, the following formulas may also be used to calculate the throat area:
wherein A represents throat area; q represents the inlet and outlet flow of the blade; v represents the average flow in the channel; m represents the average flow rate within the channel.
As can be seen, in view of the complexity of the actual structure of the axial flow impeller, it is difficult to calculate to obtain an accurate throat area when the above calculation formula is adopted, so that the throat flow and the average flow in the channel often do not meet the design requirements in the actual test, so that the design parameters need to be adjusted repeatedly by the process personnel, and the design period is greatly prolonged.
However, for the technical scheme provided by the embodiment of the invention, the blade profile sections at a plurality of different positions are obtained by dividing two adjacent blades along the blade height direction; then calculating and obtaining the area of the inlet of the blade channel and the area of the outlet of the blade channel based on the blade profile sections at the different positions; thereby obtaining the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel. According to the technical scheme provided by the embodiment of the invention, the influence of the blade profile on the accurate calculation of the throat area is fully considered, the influence of the blade profile change and torsion on the throat area calculation accuracy is reduced, and the design accuracy of the axial flow impeller is further improved.
In the specific implementation process, each blade may be uniformly divided along the blade height direction, or may be unevenly divided. For example, referring to fig. 2, in the embodiment of the present invention, adjacent first blades B0 and second blades B1 are uniformly divided, so as to obtain a plurality of blade profile sections at different positions, and for convenience of subsequent explanation, for example, each blade is equally divided into m blade profile sections at different positions along the blade height direction. It will be appreciated that the effect of blade profile variation and/or twist on the accuracy of the throat area calculation can be reduced by the method of obtaining the profile sections at a plurality of different locations.
For the solution shown in fig. 1, in some possible embodiments, the calculating, based on the blade profile sections at the plurality of different positions, an area of an inlet of the blade channel includes:
drawing tangent lines from the front edge end point of each section divided by the first blade to the direction of the pressure surface of the second blade to form a plurality of first tangent curves;
sequentially connecting a front edge line of each section on the first blade with the corresponding first tangent line curve to form a plurality of first curved surfaces;
and calculating the area of each first curved surface, and obtaining the area of the inlet of the blade channel formed by a plurality of first curved surfaces based on the area of the first curved surfaces.
It will be appreciated that, after obtaining the profile sections at a plurality of different positions corresponding to each blade, in the implementation process, as shown in fig. 3, a tangent line with respect to the section arc is drawn from the intersection point of the leading edge line QY of each section divided by the first blade B0 and the section arc toward the pressure surface Ps1 of the second blade B1, so as to form a first tangent line L1. It will be further understood that the plurality of first tangent lines L1 form a plurality of intersecting points, for example, m intersecting points, on the pressure surface Ps1 of the second blade B1, and the coordinates of the m intersecting points on the pressure surface Ps1 of the second blade B1 are obtained, thereby forming a coordinate array Ps [ m ]; it can be known that a plurality of first tangential lines L1 on the pressure surface Ps1 of the second blade B1 can be obtained by using m intersection coordinates. After a plurality of first identical curves L1 are determined, m-1 first curved surfaces can be formed by sequentially connecting the leading edge line of each section on the first blade B0 with the corresponding first tangent curve L1, so that the area A0 of the blade channel inlet can be obtained by calculating the area of the m-1 first curved surfaces.
Specifically, the calculation process for the m-1 first curved surface areas is as follows: assume that four vertex coordinates of any one first curved surface are: p0 (x 0, y0, z 0), p1 (x 1, y1, z 1), p2 (x 2, y2, z 2), p3 (x 3, y3, z 3), as shown in fig. 4, each side length and diagonal length of the first curved surface can be calculated according to the following formula:
secondly, according to the halen formula:is>，/>Is half of the circumference of (a)。
The area of the first curved surface thus obtained is:
。
therefore, after the areas of all the first curved surfaces are calculated, the area A0 of the inlet of the blade channel can be obtained through addition and summation.
For the solution shown in fig. 1, in some possible embodiments, the calculating, based on the profile sections of the plurality of different positions, an area of the blade channel outlet includes:
drawing tangents from the tail edge end point of each section divided by the second blade to the suction surface direction of the first blade to form a plurality of second tangent curves;
sequentially connecting a tail edge line of each section on the second blade with the corresponding second tangent line curve to form a plurality of second curved surfaces;
and calculating the area of each second curved surface, and obtaining the area of a blade channel outlet formed by a plurality of second curved surfaces based on the area of the second curved surfaces.
Similarly to the above-described calculation of the area A0 of the blade passage inlet, when the area A1 of the blade passage outlet is calculated, as shown in fig. 3, a tangent to the section arc is drawn toward the suction surface Ss0 direction of the first blade B0 from the intersection point of the trailing edge line WY of each section divided by the second blade B1 and the section arc to form a second tangent line L0. It will be further understood that the second tangential lines L0 form a plurality of intersecting points, for example, m intersecting points, on the suction surface Ss0 of the first blade B0, and the coordinates of the m intersecting points on the suction surface Ss0 of the first blade B0 are obtained, thereby forming a coordinate array Ss [ m ]; it can be known that a plurality of second tangential curves L0 on the suction surface Ss0 of the first blade B0 can be obtained by using m intersection coordinates. After a plurality of second tangent curves L0 are determined, m-1 second curved surfaces can be formed by sequentially connecting the tail edge line of each section of the second blade B1 with the corresponding second tangent curve L0, so that the area A1 of the blade channel outlet can be obtained by calculating the area of the m-1 second curved surfaces.
Of course, the method for calculating the second curved surface area is consistent with the method for calculating the first curved surface area, and the embodiments of the present invention are not described herein again. After the area of m-1 second curved surfaces is obtained, the area A1 of the blade channel outlet can be obtained through addition and summation.
It can be appreciated that the above-mentioned calculation method for obtaining the area A0 of the inlet of the vane channel and the area A1 of the outlet of the channel by dividing the sections at a plurality of different positions can consider the influence of the vane profile change and/or torsion on the calculation accuracy of the throat area, greatly improve the calculation accuracy, and reduce the repeated adjustment operation of the subsequent design work.
For the foregoing embodiments, in some examples, calculating the throat area according to the area of the inlet of the vane channel and the area of the outlet of the vane channel includes:
based on the area A0 of the vane channel inlet and the area A1 of the vane channel outlet, the throat area A is obtained according to the following formula:
wherein A represents the throat area; a0 represents the area of the inlet of the vane passage; a1 represents the area of the blade channel outlet; h0 represents the average radius of curvature of the suction side of the first blade; h1 represents the average radius of curvature of the first blade pressure surface.
It should be noted that, in the process of calculating the throat area a, some design parameters in the axial flow impeller, such as the average radius of curvature of the suction surface of the blade and the average radius of curvature of the pressure surface of the blade, may be used, so that before the embodiment of the present invention is implemented, the geometric dimensions and hydrodynamic parameters of the impeller machine may be collected in advance, including the hub radius, the casing radius, the channel inlet radius and the channel outlet radius, the blade inclination angle thickness, the blade mounting angle, the average radius of curvature of the pressure surface of the blade, the average radius of curvature of the suction surface of the blade, the fluid density, and the flow velocity at different positions of the channel.
For the solution described in fig. 1, in some possible embodiments, the obtaining method further includes:
based on the throat area and the preset flow velocity at the throat, calculating according to the following formula to obtain the flow at the throat:
wherein Q is t Representing the flow at the throat; vt represents the flow rate at the throat;
based on the flow at the throat, an average flow within the channel is obtained according to the following equation:
wherein Qavg represents the average flow in the channel; q (Q) in Representing the flow at the inlet of the vane passage,a0 represents the area of the inlet of the blade channel; v0 represents the flow rate at the inlet of the vane passage; q (Q) out Representing the flow at the outlet of said vane passage, < >>A1 represents the area of the blade channel outlet; v1 represents the flow rate at the outlet of the vane passage; f represents a channel speed attenuation factor, and f is more than or equal to 0 and less than or equal to 1.0; d represents the channel length; d1 represents the length of the vane passage from the inlet to the throat; />An air flow angle representing the inlet of the vane passage; />An air flow angle representing the outlet of the vane passage;indicating the blade mounting angle.
It will be appreciated that the flow calculation may be reduced to that irrespective of the nature of the fluid and the operating conditions of the axial flow impeller:
Inlet flow rate of channelThe method comprises the steps of carrying out a first treatment on the surface of the Wherein A0 represents the area of the inlet of the vane passage; v0 represents the flow rate at the inlet of the vane passage;
channel outlet flowThe method comprises the steps of carrying out a first treatment on the surface of the Wherein A1 represents the area of the blade channel outlet; v1 represents the flow rate at the exit of the vane passage;
flow at throatWhere Vt represents the flow rate at the throat. It should be noted that the flow rate at the throat is also referred to as a bottleneck flow rate.
The above formula shows that the flow rate at different positions in the channel is in direct proportion to the area and flow velocity at different positions in the corresponding channel, while the throat is the minimum area in the channel, so that the flow velocity Vt at the throat reaches the highest speed during the gradual acceleration of fluid flowing from the inlet to the outlet of the channel, and the flow rate Q at the throat t Typically the maximum flow in the impeller channel is the key node for flow control in the channel.
It will be appreciated that the flow rate Q at the inlet of the vane passage is calculated from the area A0 of the inlet of the vane passage, the area A1 of the outlet of the vane passage and the throat area A in Flow rate Q at blade channel outlet out Throat flow Q t Then, the average flow Qavg in the whole channel can be calculated.
The parameters f, d1 when calculating the average flow rate of the entire channel,、/>、/>The initial parameters can be customized according to the actual situation.
For the solution described in fig. 1, in some possible embodiments, the obtaining method further includes:
collecting multiple groups of data sets and dividing the multiple groups of data sets into a data training set and a data verification set according to a set proportion; wherein the data set comprises known design parameters, the throat area A, the flow rate Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And an average flow rate Qavg within the channel; wherein the known design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; air flow angle of channel inlet The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of channel outlet->Blade mounting angle +.>；
Sequentially inputting a plurality of groups of data training sets into an initial autonomous learning machine model to train the initial autonomous learning machine model to obtain a trained autonomous learning machine model;
sequentially inputting a plurality of groups of data verification sets into the trained autonomous learning machine model to verify the trained autonomous learning machine model;
setting the throat area A and the flow Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out The average flow Qavg in the channel is input into the autonomous learning machine model with the completed verification, and the output of the autonomous learning machine model with the completed verification is obtained, so that the adaptive design parameters are obtained; wherein the adaptive design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; airflow angle at inlet of vane channel The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of blade channel outlet ∈>Blade mounting angle +.>。
It will be appreciated that the design parameters known in the foregoing embodiments, such as hub radius, casing radius, channel inlet radius and channel outlet radius, blade pitch angle thickness, blade pressure surface average radius of curvature, blade suction surface average radius of curvature, fluid density, flow velocity V0 of the channel inlet and flow velocity V1 of the channel outlet, flow velocity Vt at the throat, channel velocity attenuation factor f, channel length d, length d1 of the channel inlet to the throat, air flow angle α of the channel inlet, air flow angle β of the channel outlet, blade mounting angle θ, and calculated throat area a, flow Q at the throat t Area A0 of vane channel inlet, flow Q at vane channel inlet in The blade channel outletIs equal to the area A1 of the blade channel outlet and the flow rate Q at the outlet out And inputting the average flow in the channel into a pre-established initial autonomous learning machine model, and performing adjustment training on the autonomous learning machine model by utilizing a plurality of groups of data sets, so that the design parameters after adjustment, such as the set throat area A and the set flow Q at the throat, can be input t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And when the average flow Qavg in the channel is, other design parameters can be correspondingly obtained, so that efficient and accurate direction adjustment guidance is provided for process staff in the specific design process, and the design period and accuracy are greatly improved.
Based on the same inventive concept as the previous technical solution, referring to fig. 5, there is shown an acquiring device 50 for an axial flow impeller design parameter provided by an embodiment of the present invention, where the acquiring device 50 includes a dividing portion 501, a first acquiring portion 502, a second acquiring portion 503 and a third acquiring portion 504; wherein,,
the dividing part 501 is configured to divide two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
the first obtaining portion 502 is configured to calculate and obtain an area of a blade channel inlet based on the blade profile sections of the plurality of different positions;
the second obtaining portion 503 is configured to calculate and obtain an area of a blade passage outlet based on the blade profile sections of the plurality of different positions;
The third obtaining portion 504 is configured to calculate a throat area according to the area of the inlet of the vane channel and the area of the outlet of the vane channel.
Optionally, in some examples, the first acquisition portion 502 is configured to:
drawing tangent lines from the front edge end point of each section divided by the first blade to the direction of the pressure surface of the second blade to form a plurality of first tangent curves;
sequentially connecting a front edge line of each section on the first blade with the corresponding first tangent line curve to form a plurality of first curved surfaces;
and calculating the area of each first curved surface, and obtaining the area of the inlet of the blade channel formed by a plurality of first curved surfaces based on the area of the first curved surfaces.
Optionally, in some examples, the first obtaining portion 503 is configured to:
drawing tangents from the tail edge end point of each section divided by the second blade to the suction surface direction of the first blade to form a plurality of second tangent curves;
sequentially connecting a tail edge line of each section on the second blade with the corresponding second tangent line curve to form a plurality of second curved surfaces;
and calculating the area of each second curved surface, and obtaining the area of a blade channel outlet formed by a plurality of second curved surfaces based on the area of the second curved surfaces.
Optionally, in some examples, the third acquisition portion 504 is configured to:
based on the area A0 of the vane channel inlet and the area A1 of the vane channel outlet, the throat area A is obtained according to the following formula:
wherein A represents the throat area; a0 represents the area of the inlet of the vane passage; a1 represents the area of the blade channel outlet; h0 represents the average radius of curvature of the suction side of the first blade; h1 represents the average radius of curvature of the first blade pressure surface.
For the acquisition device 50 depicted in fig. 5, in some possible embodiments, as shown in fig. 6, the acquisition device further comprises a fourth acquisition portion 505, the fourth acquisition portion 505 being configured to:
based on the throat area and the preset flow velocity at the throat, calculating according to the following formula to obtain the flow at the throat:
wherein Q is t Representing the flow at the throat; vt represents the flow rate at the throat;
based on the flow at the throat, an average flow within the channel is obtained according to the following equation:
wherein Qavg represents the average flow in the channel; q (Q) in Representing the flow at the inlet of the vane passage,a0 represents the area of the inlet of the blade channel; v0 represents the flow rate at the inlet of the vane passage; q (Q) out Representing the flow at the outlet of said vane passage, < >>A1 represents the area of the blade channel outlet; v1 represents the flow rate at the outlet of the vane passage; f represents a channel speed attenuation factor, and f is more than or equal to 0 and less than or equal to 1.0; d represents the channel length; d1 represents the length of the vane passage from the inlet to the throat; />An air flow angle representing the inlet of the vane passage; />An air flow angle representing the outlet of the vane passage;indicating the blade mounting angle.
For the acquisition device 50 depicted in fig. 5, in some possible embodiments, as shown in fig. 7, the acquisition device further comprises a machine learning portion 506, the machine learning portion 506 being configured to:
collecting multiple groups of data sets and dividing the multiple groups of data sets into a data training set and a data verification set according to a set proportion; wherein the data set comprises known design parameters, the throat area A, the flow rate Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And an average flow rate Qavg within the channel; wherein the known design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; air flow angle of channel inlet The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of channel outlet->Blade mounting angle +.>；
Sequentially inputting a plurality of groups of data training sets into an initial autonomous learning machine model to train the initial autonomous learning machine model to obtain a trained autonomous learning machine model;
sequentially inputting a plurality of groups of data verification sets into the trained autonomous learning machine model to verify the trained autonomous learning machine model;
setting the throat area A and the flow Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And the average flow Qavg in the channel is input to the autonomous learning machine with verification completedIn the model, obtaining the output of the autonomous learning machine model after verification to obtain adaptive design parameters; wherein the adaptive design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; airflow angle at inlet of vane channel The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of blade channel outlet ∈>Blade mounting angle +.>。
It will be appreciated that in this embodiment, a "part" may be a part of a circuit, a part of a processor, a part of a program or software, etc., and of course may be a unit, or a module may be non-modular.
In addition, each component in the present embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional modules.
The integrated units, if implemented in the form of software functional modules, may be stored in a computer-readable storage medium, if not sold or used as separate products, and based on such understanding, the technical solution of the present embodiment may be embodied essentially or partly in the form of a software product, which is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or processor to perform all or part of the steps of the method described in the present embodiment. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Accordingly, the present embodiment provides a computer storage medium storing a program for acquiring the design parameters of the axial flow impeller, which when executed by at least one processor, implements the steps of the method for acquiring the design parameters of the axial flow impeller in the above technical solution.
According to the above-described axial flow impeller design parameter acquisition apparatus 50 and computer storage medium, referring to fig. 8, a specific hardware structure of a computing device 80 capable of implementing the axial flow impeller design parameter acquisition apparatus 50 provided by an embodiment of the present invention is shown, where the computing device 80 may be a wireless device, a mobile or cellular phone (including a so-called smart phone), a Personal Digital Assistant (PDA), a video game console (including a video display, a mobile video game device, a mobile video conference unit), a laptop computer, a desktop computer, a television set-top box, a tablet computing device, an electronic book reader, a fixed or mobile media player, and so on. The computing device 80 includes: a communication interface 801, a memory 802, and a processor 803; the various components are coupled together by a bus system 804. It is to be appreciated that the bus system 804 is employed to enable connected communications between these components. The bus system 804 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various buses are labeled as bus system 804 in fig. 8. Wherein,,
The communication interface 801 is configured to receive and send signals during the process of receiving and sending information with other external network elements;
the memory 802 for storing a computer program capable of running on the processor 803;
the processor 803 is configured to execute the following steps when running the computer program:
dividing two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
calculating the area of the inlet of the blade channel based on the blade profile sections at the plurality of different positions;
calculating the area of the blade channel outlet based on the blade profile sections at the different positions;
and calculating to obtain the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel.
It will be appreciated that the memory 802 in embodiments of the invention can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). The memory 802 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
And the processor 803 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry of hardware or instructions in software form in the processor 803. The processor 803 may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 802, and the processor 803 reads information in the memory 802, and in combination with its hardware, performs the steps of the above method.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (DSP devices, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Specifically, the processor 803 is further configured to execute the method steps for obtaining the design parameters of the axial flow impeller in the foregoing technical solution when executing the computer program, which is not described herein.
It should be noted that: the technical schemes described in the embodiments of the present invention may be arbitrarily combined without any collision.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A method for obtaining design parameters of an axial flow impeller, the method comprising:
dividing two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
calculating the area of the inlet of the blade channel based on the blade profile sections at the plurality of different positions;
calculating the area of the blade channel outlet based on the blade profile sections at the different positions;
according to the area of the inlet of the blade channel and the area of the outlet of the blade channel, calculating to obtain the throat area;
wherein, based on the blade profile sections of the plurality of different positions, calculating the area of the inlet of the blade channel comprises the following steps:
Dividing the vane passage inlet into a plurality of first curved surfaces by drawing a tangent line from a leading edge end point of each vane profile section of a first vane of the two adjacent vanes toward a pressure surface direction of a second vane of the two adjacent vanes;
obtaining the area of the inlet of the blade channel according to the areas of the first curved surfaces;
wherein, based on the blade profile sections of the plurality of different positions, calculating the area of the outlet of the blade channel comprises the following steps:
dividing the blade passage outlet into a plurality of second curved surfaces by drawing a tangent line from a trailing edge end point of each blade profile section of the second blade toward the suction surface direction of the first blade;
and obtaining the area of the blade channel outlet according to the areas of the second curved surfaces.
2. The method according to claim 1, wherein calculating an area of the inlet of the vane passage based on the plurality of vane-type cross sections at different positions includes:
drawing tangent lines from the front edge end point of each section divided by the first blade to the direction of the pressure surface of the second blade to form a plurality of first tangent curves;
sequentially connecting a front edge line of each section on the first blade with the corresponding first tangent line curve to form a plurality of first curved surfaces;
And calculating the area of each first curved surface, and obtaining the area of the inlet of the blade channel formed by a plurality of first curved surfaces based on the area of the first curved surfaces.
3. The method according to claim 1, wherein calculating an area of a vane passage outlet based on the plurality of vane-type cross sections at different positions includes:
drawing tangents from the tail edge end point of each section divided by the second blade to the suction surface direction of the first blade to form a plurality of second tangent curves;
sequentially connecting a tail edge line of each section on the second blade with the corresponding second tangent line curve to form a plurality of second curved surfaces;
and calculating the area of each second curved surface, and obtaining the area of a blade channel outlet formed by a plurality of second curved surfaces based on the area of the second curved surfaces.
4. The method according to claim 2, wherein calculating the throat area according to the area of the inlet of the vane passage and the area of the outlet of the vane passage comprises:
based on the area A0 of the vane channel inlet and the area A1 of the vane channel outlet, the throat area A is obtained according to the following formula:
Wherein A represents the throat area; a0 represents the area of the inlet of the vane passage; a1 represents the area of the blade channel outlet; h0 represents the average radius of curvature of the suction side of the first blade; h1 represents the average radius of curvature of the first blade pressure surface.
5. The acquisition method according to claim 1, characterized in that the acquisition method further comprises:
based on the throat area and the preset flow velocity at the throat, calculating according to the following formula to obtain the flow at the throat:
wherein Q is t Representing the flow at the throat; vt represents the flow rate at the throat;
based on the flow at the throat, an average flow within the channel is obtained according to the following equation:
wherein Qavg represents the average flow in the channel; q (Q) in Representing the flow at the inlet of the vane passage,a0 represents the area of the inlet of the blade channel; v0 represents the flow rate at the inlet of the vane passage; q (Q) out Representation houseFlow at the outlet of the vane channel, +.>A1 represents the area of the blade channel outlet; v1 represents the flow rate at the outlet of the vane passage; f represents a channel speed attenuation factor, and f is more than or equal to 0 and less than or equal to 1.0; d represents the channel length; d1 represents the length of the vane passage from the inlet to the throat; / >An air flow angle representing the inlet of the vane passage; />An air flow angle representing the outlet of the vane passage; />Indicating the blade mounting angle.
6. The acquisition method according to claim 5, characterized in that the acquisition method further comprises:
collecting multiple groups of data sets and dividing the multiple groups of data sets into a data training set and a data verification set according to a set proportion; wherein the data set comprises known design parameters, the throat area A, the flow rate Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out And an average flow rate Qavg within the channel; wherein the known design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; air flow angle of channel inlet The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of channel outlet->Blade mounting angle +.>；
Sequentially inputting a plurality of groups of data training sets into an initial autonomous learning machine model to train the initial autonomous learning machine model to obtain a trained autonomous learning machine model;
sequentially inputting a plurality of groups of data verification sets into the trained autonomous learning machine model to verify the trained autonomous learning machine model;
setting the throat area A and the flow Q at the throat t An area A0 of the vane channel inlet, a flow rate Q at the vane channel inlet in Area A1 of the vane passage outlet, flow rate Q at the vane passage outlet out The average flow Qavg in the channel is input into the autonomous learning machine model with the completed verification, and the output of the autonomous learning machine model with the completed verification is obtained, so that the adaptive design parameters are obtained; wherein the adaptive design parameters include: hub radius, casing radius, channel inlet radius and channel outlet radius, blade inclination angle thickness, blade pressure surface average curvature radius, blade suction surface average curvature radius, fluid density, flow velocity V0 of blade channel inlet and flow velocity V1 of blade channel outlet, flow velocity Vt at throat, channel velocity attenuation factor f, channel length d, channel inlet to throat length d1; airflow angle at inlet of vane channel The method comprises the steps of carrying out a first treatment on the surface of the Air flow angle of blade channel outlet ∈>Blade mounting angle +.>。
7. An acquisition device of an axial flow impeller design parameter is characterized by comprising a dividing part, a first acquisition part, a second acquisition part and a third acquisition part; wherein,,
the dividing part is configured to divide two adjacent blades along the blade height direction to obtain blade profile sections at a plurality of different positions;
the first acquisition part is configured to calculate and obtain the area of the inlet of the blade channel based on the blade profile sections at the plurality of different positions;
the second acquisition part is configured to calculate and obtain the area of the blade channel outlet based on the blade profile sections of the plurality of different positions;
the third acquisition part is configured to calculate and obtain the throat area according to the area of the inlet of the blade channel and the area of the outlet of the blade channel;
wherein the first acquisition portion is further configured to:
dividing the vane passage inlet into a plurality of first curved surfaces by drawing a tangent line from a leading edge end point of each vane profile section of a first vane of the two adjacent vanes toward a pressure surface direction of a second vane of the two adjacent vanes;
Obtaining the area of the inlet of the blade channel according to the areas of the first curved surfaces;
wherein the second acquisition portion is further configured to:
dividing the blade passage outlet into a plurality of second curved surfaces by drawing a tangent line from a trailing edge end point of each blade profile section of the second blade toward the suction surface direction of the first blade;
and obtaining the area of the blade channel outlet according to the areas of the second curved surfaces.
8. The acquisition device of claim 7, wherein the acquisition device further comprises: a fourth acquisition section configured to:
based on the throat area and the preset flow velocity at the throat, calculating according to the following formula to obtain the flow at the throat:
wherein Q is t Representing the flow at the throat; vt represents the flow rate at the throat;
based on the flow at the throat, an average flow within the channel is obtained according to the following equation:
wherein Qavg represents the average flow in the channel; q (Q) in Representing the flow at the inlet of the vane passage,a0 represents the area of the inlet of the blade channel; v0 represents the flow rate at the inlet of the vane passage; q (Q) out Representing the flow at the outlet of said vane passage, < > >A1 represents the area of the blade channel outlet; v1 represents the flow rate at the outlet of the vane passage; f represents a channel speed attenuation factor, and f is more than or equal to 0 and less than or equal to 1.0; d represents the channel length; d1 represents the length of the vane passage from the inlet to the throat; />An air flow angle representing the inlet of the vane passage; />An air flow angle representing the outlet of the vane passage; />Indicating the blade mounting angle.
9. An acquisition apparatus for axial flow impeller design parameters, the acquisition apparatus comprising: a communication interface, a memory and a processor; the components are coupled together by a bus system; wherein,,
the communication interface is used for receiving and transmitting signals in the process of receiving and transmitting information with other external network elements;
the memory is used for storing a computer program capable of running on the processor;
the processor is configured to execute the method steps of obtaining the design parameters of the axial flow impeller according to any one of claims 1 to 6 when the computer program is executed.
10. A computer storage medium storing a program for acquiring the design parameters of the axial flow impeller, which when executed by at least one processor, implements the method steps of the method for acquiring the design parameters of the axial flow impeller according to any one of claims 1 to 6.
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