CN112729751A - Test bed - Google Patents
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- CN112729751A CN112729751A CN202011607470.6A CN202011607470A CN112729751A CN 112729751 A CN112729751 A CN 112729751A CN 202011607470 A CN202011607470 A CN 202011607470A CN 112729751 A CN112729751 A CN 112729751A
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000009792 diffusion process Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 description 17
- 230000009286 beneficial effect Effects 0.000 description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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Abstract
The invention discloses a test bed which comprises a shell, a flow dividing assembly, a plurality of blades and a detector, wherein the shell comprises a first sub-shell and a second sub-shell, an air inlet cavity is formed in the first sub-shell, an air outlet cavity is formed in the second sub-shell, the flow dividing assembly comprises a first flow dividing plate and a second flow dividing plate, the first flow dividing plate and the second flow dividing plate are arranged in the air inlet cavity along the length direction of the air inlet cavity, the first flow dividing plate and the second flow dividing plate are spaced along a first direction, the plurality of blades are spaced along the first direction and are arranged at the communication position of the air inlet cavity and the air outlet cavity, a plurality of through holes are formed in the shell, the plurality of through holes are positioned between every two adjacent blades in the first direction, and a probe of the detector is matched with the through holes so as to measure the flow velocity and the pressure of. According to the test bed, the air flow is divided by the flow dividing assembly, so that data errors caused by air flow diffusion are reduced, and the accuracy of a measuring result is improved.
Description
Technical Field
The invention relates to the technical field of wind tunnel tests, in particular to a test bed.
Background
In the related art, numerical simulation and wind tunnel experiments become main tools for people to research impeller machinery. Among them, the low-speed plane cascade test bench is an experimental device which is easy to build, maintain, refit and operate, and can meet a plurality of basic exploration requirements. In the preliminary experiment of the device of the turbine and the compressor, the low-speed plane blade cascade is a good choice.
However, in the actual measurement process, due to the action of centrifugal force, an uneven area with high and low pressure distribution is generated on the side wall of the airflow in the low-speed plane blade grid test bed, so that the airflow generates a diffusion phenomenon, and finally, a measurement result generates errors.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides the test bed, the test bed divides the airflow through the flow dividing assembly, the data error caused by airflow diffusion is reduced, and the accuracy of the measuring result is improved.
The test bed according to the embodiment of the invention comprises: the shell comprises a first sub-shell and a second sub-shell, an air inlet cavity is formed in the first sub-shell, an air outlet cavity is formed in the second sub-shell, and the air inlet cavity is communicated with the air outlet cavity; the flow dividing assembly comprises a first flow dividing plate and a second flow dividing plate, the first flow dividing plate and the second flow dividing plate are arranged in the air inlet cavity along the length direction of the air inlet cavity, and the first flow dividing plate and the second flow dividing plate are spaced along a first direction; the blades are arranged at the communication position of the air inlet cavity and the air outlet cavity at intervals along the first direction, the shell is provided with a plurality of through holes, and the through holes are positioned between two adjacent blades in the first direction; a probe of the probe and the through-hole cooperate to measure a flow rate and a pressure of the air flow at the through-hole through the through-hole.
According to the test bed provided by the embodiment of the invention, the test bed is provided with the air inlet cavity and the air outlet cavity, and the air flow entering the air inlet cavity can be divided into the main flow air flow and the divided air flows positioned at two sides of the main flow air flow by arranging the first flow dividing plate and the second flow dividing plate which extend along the length direction of the air inlet cavity in the air inlet cavity, so that the flow velocity and the pressure of the main flow air flow are more uniformly distributed, and the accuracy of the measurement result of the air flow in the air inlet cavity is favorably improved.
In some embodiments, the first sub-housing includes a first side wall and a second side wall disposed opposite to each other along the first direction, the first flow dividing plate and the second flow dividing plate are movably disposed in the air intake cavity along the first direction, in the first direction, the first flow dividing plate is located between the first side wall and the second flow dividing plate, the second flow dividing plate is located between the first flow dividing plate and the second side wall, and the first side wall, the second side wall, the first flow dividing plate, and the second flow dividing plate are parallel to each other.
In some embodiments, when the flow rate of the air flow in the air inlet cavity is greater than or equal to the preset value, the distance between the first flow dividing plate and the second flow dividing plate is 0.6-0.7 of the distance between the first side wall and the second side wall in the first direction, and when the flow rate of the air flow in the air inlet cavity is less than the preset value, the distance between the first flow dividing plate and the second flow dividing plate is 0.8-0.9 of the distance between the first side wall and the second side wall in the first direction.
In some embodiments, when the flow rate of the air flow in the air intake cavity is greater than or equal to the preset value, the distance between the first flow dividing plate and the second flow dividing plate in the first direction is 2/3 of the distance between the first side wall and the second side wall, and when the flow rate of the air flow in the air intake cavity is less than the preset value, the distance between the first flow dividing plate and the second flow dividing plate in the first direction is 8/9 of the distance between the first side wall and the second side wall.
In some embodiments, the air inlet chamber has an inlet end and an outlet end opposite to each other along the length direction thereof, the outlet end is communicated with the outlet chamber, the first flow dividing plate and the second flow dividing plate have the same length, one end of the first flow dividing plate is arranged at the outlet end, the other end of the first flow dividing plate is adjacent to or arranged at the inlet end, one end of the second flow dividing plate is arranged at the outlet end, and the other end of the second flow dividing plate is adjacent to or arranged at the inlet end.
In some embodiments, the one end of the first splitter plate is aligned with the tips of the blades and the one end of the second splitter plate is aligned with the tips of the blades along the length of the air inlet chamber.
In some embodiments, the length of the first flow splitter plate is equal to or greater than 5 times the chord length of the blade.
In some embodiments, the length of the outlet chamber is 100% -200% of the chord length of the blade.
In some embodiments, the through holes are circular holes, the diameter of each through hole is 0.8-1.2mm, a plurality of through holes are uniformly arranged between two adjacent blades, and the distance between every two adjacent through holes is 4-6 mm.
In some embodiments, the axial direction of the through hole is substantially perpendicular to the length direction of the air inlet cavity.
Drawings
Fig. 1 is a perspective view of a test stand according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a test stand according to an embodiment of the present invention.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
Reference numerals:
the test stand 100 is provided with a test bed,
the shell 1, the first sub-shell 11, the first side wall 111, the second side wall 112, the second sub-shell 12, the air inlet chamber 13, the first sub-chamber 131, the second sub-chamber 132, the third sub-chamber 133, the air outlet chamber 14, the through hole 15, the flow dividing assembly 2, the first flow dividing plate 21, the second flow dividing plate 22, the blades 3,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 3, a test stand 100 according to an embodiment of the present invention includes a housing 1, a flow dividing assembly 2, a plurality of blades 3, and a probe (not shown).
The shell 1 comprises a first sub-shell 11 and a second sub-shell 12, wherein an air inlet cavity 13 is arranged in the first sub-shell 11, an air outlet cavity 14 is arranged in the second sub-shell 12, and the air inlet cavity 13 is communicated with the air outlet cavity 14.
The flow dividing assembly 2 includes a first flow dividing plate 21 and a second flow dividing plate 22, the first flow dividing plate 21 and the second flow dividing plate 22 are disposed in the air intake cavity 13 along a length direction of the air intake cavity 13 (e.g., up and down direction as viewed in fig. 1), and the first flow dividing plate 21 and the second flow dividing plate 22 are spaced apart along a first direction (e.g., left and right direction as viewed in fig. 1).
The plurality of blades 3 are arranged at the communication position of the air inlet cavity 13 and the air outlet cavity 14 at intervals along the first direction, the shell 1 is provided with a plurality of through holes 15, and the plurality of through holes 15 are positioned between two adjacent blades 3 in the first direction.
The probe of the probe and the through hole 15 cooperate so as to measure the flow rate and pressure of the air flow at the through hole 15 through the through hole 15.
The specific implementation process of the test bed 100 according to the embodiment of the invention is as follows:
the air current flows into the air inlet cavity 13 from the upper end of the air inlet cavity 13, a first flow dividing plate 21 and a second flow dividing plate 22 which are spaced are arranged in the air inlet cavity 13 along the left-right direction, and the air inlet cavity 13 can be divided into a first sub-cavity 131, a second sub-cavity 132 and a third sub-cavity 133 by the first flow dividing plate 21 and the second flow dividing plate 22. Wherein second subchamber 132 is a flow-through chamber for the main flow of gas, and second subchamber 132 is located between first subchamber 131 and third subchamber 133.
The lower end of the air inlet cavity 13 is communicated with the right end of the air outlet cavity 14, the blades 3 are arranged at the communicated position of the air inlet cavity 13 and the air outlet cavity 14, meanwhile, a plurality of through holes 15 are arranged at the communicated position of the air inlet cavity 13 and the air outlet cavity 14, the through holes 15 penetrate through the shell 1 along the front-back direction, and the through holes 15 are positioned between the adjacent blades 3 in the left-right direction.
The probe can be arranged outside the shell 1, the probe of the probe can penetrate through the through hole 15 and then extend into the shell 1, and the probe of the probe is used for measuring the flow speed and the pressure of the air flow at the through hole 15.
The first flow dividing plate 21 and the second flow dividing plate 22 enable air flowing into the air inlet cavity 13 to flow from the first sub-cavity 131, the second sub-cavity 132 and the third sub-cavity 133 to the lower end of the air inlet cavity 13. When the airflow passes through the first splitter plate 21 and the second splitter plate 22, the flow velocity of the airflow in the second sub-cavity 132 is uniform, and the airflow is not diffused near the first splitter plate 21 and the second splitter plate 22, which is beneficial to improving the accuracy of the measurement result of the detector.
Thus, the test stand 100 according to the embodiment of the present invention has advantages of making the flow velocity of the air flow in the air intake chamber 11 uniform, preventing the air flow from being diffused, and making the air flow measurement result more accurate.
In some embodiments, as shown in fig. 1-2, the first sub-housing 11 includes a first side wall 111 and a second side wall 112 disposed opposite to each other along a first direction, and the first flow dividing plate 21 and the second flow dividing plate 22 are movably disposed in the air inlet cavity 13 along the first direction. In the first direction, the first flow dividing plate 21 is located between the first sidewall 111 and the second flow dividing plate 22, and the second flow dividing plate 22 is located between the first flow dividing plate 21 and the second sidewall 112. And the first sidewall 111, the second sidewall 112, the first current dividing plate 21 and the second current dividing plate 22 are parallel to each other.
Specifically, as shown in fig. 1-2, the first side wall 111, the second side wall 112, the first splitter plate 21, and the second splitter plate 22 are parallel to each other in the vertical direction, so that the airflow flowing in the air inlet cavity 13 is parallel to the first side wall 111, the second side wall 112, the first splitter plate 21, and the second splitter plate 22, and the airflow in the air inlet cavity 13 does not interfere with the first side wall 111, the second side wall 112, the first splitter plate 21, and the second splitter plate 22 during flowing, so that the airflow in the air inlet cavity 13 is stable in the direction, which is beneficial to improving the accuracy of the measurement result of the detector.
In some embodiments, as shown in fig. 2, when the flow rate of the air flow in the air inlet cavity 13 is greater than or equal to the preset value, the distance between the first flow dividing plate 21 and the second flow dividing plate 22 is 0.6-0.7 of the distance between the first side wall 111 and the second side wall 112 in the first direction. When the flow rate of the air flow in the air inlet cavity 13 is smaller than the preset value, the distance between the first flow dividing plate 21 and the second flow dividing plate 22 is 0.8-0.9 of the distance between the first side wall 111 and the second side wall 112 in the first direction.
Specifically, the preset value may be set according to the actual situation of the test stand 100. When the flow velocity of the air flow in the air inlet cavity 13 is greater than or equal to the preset value, that is, the flow velocity of the air flow in the air inlet cavity 13 is high, the air flow in the air inlet cavity 13 is easy to diffuse, so that the distance between the first splitter plate 21 and the second splitter plate 22 can be reduced, the probability of air flow diffusion is reduced, and the accuracy of the measurement result of the detector is improved.
When the flow velocity of the air flow in the air inlet cavity 13 is smaller than the preset value, that is, the flow velocity of the air flow in the air inlet cavity 13 is lower, the probability of diffusion of the air flow in the air cavity 13 is reduced, so that the distance between the first splitter plate 21 and the second splitter plate 22 can be enlarged, the flow of the mainstream air flow is increased, more mainstream air flows through the through holes 15, the measurement range of the detector is improved, and the accuracy of the measurement result of the detector is improved.
In some embodiments, as shown in fig. 1-2, when the flow rate of the air flow in the air inlet cavity 13 is greater than or equal to the preset value, the distance between the first splitter plate 21 and the second splitter plate 22 in the first direction is 2/3 of the distance between the first sidewall 111 and the second sidewall 112. When the flow rate of the air flow in the air inlet chamber 13 is smaller than the preset value, the distance between the first splitter plate 21 and the second splitter plate 22 in the first direction is 8/9 of the distance between the first side wall 111 and the second side wall 112.
Specifically, the preset value can be set according to the actual situation of the test bed 100, and the test bed 100 of the present invention can adjust the distance between the first splitter plate 21 and the second splitter plate 22 according to the flow rate of the air flow in the air inlet cavity 13, which is beneficial to improving the accuracy of the measurement result.
In some embodiments, as shown in fig. 1-2, the air inlet plenum 13 has an inlet end (e.g., the upper end of the air inlet plenum 13 in fig. 1) and an outlet end (e.g., the lower end of the air inlet plenum 13 in fig. 1) opposite along its length (e.g., up and down as shown in fig. 1). The outlet end is in communication with the outlet chamber 14, the first flow distribution plate 21 and the second flow distribution plate 22 are equal in length, one end of the first flow distribution plate 21 (e.g., the lower end of the first flow distribution plate 21 in fig. 2) is disposed at the outlet end, and the other end of the first flow distribution plate 21 (e.g., the upper end of the first flow distribution plate 21 in fig. 2) is adjacent to or disposed at the inlet end. One end of the second flow splitter plate 22 (e.g., the lower end of the second flow splitter plate 22 in fig. 2) is disposed at the outlet end, and the other end of the second flow splitter plate 22 (e.g., the upper end of the second flow splitter plate 22 in fig. 2) is adjacent to or disposed at the inlet end.
Specifically, the lengths of the first flow dividing plate 21 and the second flow dividing plate 22 are equal, so that the flow dividing effects of the first flow dividing plate 21 and the second flow dividing plate 22 on the air flow are the same, and the air flow is not diffused to the side where the first flow dividing plate 21 is located, or not diffused to the side where the second flow dividing plate 22 is located.
The lower end of the first splitter plate 21 and the lower end of the second splitter plate 22 are both disposed at the lower end of the air inlet cavity 13, so that the air flow in the air inlet cavity 13 is split and then does not mix in the air inlet cavity 13, the flow velocity of the main flow air flow circulating in the second sub-cavity 132 is stable, the main flow air flow can stably flow through the detection area where the through hole 15 is located, and the accuracy of the measurement result is improved.
The upper end of the first splitter plate 21 and the upper end of the second splitter plate 22 should be disposed at the upper end of the air inlet cavity 13 as much as possible, so that the length of the first splitter plate 21 and the second splitter plate 22 in the air inlet cavity 13 can be maximally extended, and the longer the length of the first splitter plate 21 and the length of the second splitter plate 22 are, the better the air flow splitting effect is, which is beneficial to improving the accuracy of the measurement result.
In some embodiments, as shown in fig. 2, one end of the first splitter plate 21 (e.g., the lower end of the first splitter plate 21 in fig. 2) is aligned with the top end of the blade 3, and one end of the second splitter plate 22 (e.g., the lower end of the second splitter plate 22 in fig. 2) is aligned with the top end of the blade 3 along the length of the air inlet cavity 13.
Specifically, the through-holes 15 are located between the adjacent blades 3 in the left-right direction, and part of the through-holes 15 are located above the tips of the blades 3 in the up-down direction. The lower ends of the first and second flow dividing plates 21 and 22 are aligned with the top end of the blade 3, so that the main airflow flowing between the first and second flow dividing plates 21 and 22 does not interfere with the divided airflow when flowing through the through hole 15, which is beneficial to improving the accuracy of the measurement result.
In some embodiments, the length of the first flow dividing plate 21 is greater than or equal to 5 times the chord length of the blade 3, and it can be understood that the length of the first flow dividing plate 21 is equal to the length of the second flow dividing plate 22, and the longer the lengths of the first flow dividing plate 21 and the second flow dividing plate 22 are, the better the flow dividing effect of the first flow dividing plate 21 and the second flow dividing plate 22 on the air flow is, the better the diffusion of the air flow is, and the better the accuracy of the measurement result is.
In some embodiments, the length of the air outlet cavity 14 is 100% -200% of the chord length of the blade 3, and it can be understood that the shorter the length of the air outlet cavity 14 is, the faster the airflow can flow out of the air outlet cavity 14, and because the air outlet cavity 14 is not provided with the flow dividing assembly 2, the airflow can diffuse in the air outlet cavity 14, and the length of the air outlet cavity 14 is shortened as much as possible, which is beneficial to the faster the airflow flows out of the air outlet cavity 14, reducing the probability of the airflow diffusing, and also beneficial to improving the accuracy of the measurement result.
In some embodiments, as shown in fig. 3, the through holes 15 are circular holes, the diameter of the through holes 15 is 0.8-1.2mm, a plurality of through holes 15 are uniformly arranged between two adjacent blades 3, and the distance between the adjacent through holes 15 is 4-6 mm. It can be understood that after multiple tests, when the diameter of the through hole 15 is 0.8-1.2mm and the distance between adjacent through holes 15 is 4-6mm, the measurement of the airflow in the shell 1 by the detector is facilitated, and the accuracy of the measurement result is improved.
Preferably, the diameter of the through-holes 15 is 1.0mm, and the interval between the adjacent through-holes 15 is 5 mm.
In some embodiments, as shown in fig. 1-3, the axial direction (e.g., the front-to-back direction shown in fig. 1) of the through-holes 15 is substantially perpendicular to the length of the air intake chamber 13. Therefore, the flow direction of the air flow is approximately perpendicular to the axial direction of the through hole 15, namely, the air inlet angle of the through hole 15 is 0 degree relative to the air flow, the probability that the air flow flows out of the through hole 15 is reduced, the flow direction of the air flow is stable, and the accuracy of the measuring result is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A test stand, comprising:
the shell comprises a first sub-shell and a second sub-shell, an air inlet cavity is formed in the first sub-shell, an air outlet cavity is formed in the second sub-shell, and the air inlet cavity is communicated with the air outlet cavity;
the flow dividing assembly comprises a first flow dividing plate and a second flow dividing plate, the first flow dividing plate and the second flow dividing plate are arranged in the air inlet cavity along the length direction of the air inlet cavity, and the first flow dividing plate and the second flow dividing plate are spaced along a first direction;
the blades are arranged at the communication position of the air inlet cavity and the air outlet cavity at intervals along the first direction, the shell is provided with a plurality of through holes, and the through holes are positioned between two adjacent blades in the first direction;
a probe of the probe and the through-hole cooperate to measure a flow rate and a pressure of the air flow at the through-hole through the through-hole.
2. The test bed of claim 1, wherein the first sub-housing includes a first side wall and a second side wall oppositely disposed along the first direction, the first and second flow distribution plates being movably disposed within the intake air cavity along the first direction, the first flow distribution plate being positioned between the first side wall and the second flow distribution plate in the first direction, the second flow distribution plate being positioned between the first flow distribution plate and the second side wall, the first side wall, the second side wall, the first flow distribution plate, and the second flow distribution plate being parallel to each other.
3. The test bed of claim 2, wherein when the flow rate of the air flow in the intake air chamber is greater than or equal to the predetermined value, the distance between the first and second flow splitter plates in the first direction is 0.6-0.7 of the distance between the first and second side walls, and when the flow rate of the air flow in the intake air chamber is less than the predetermined value, the distance between the first and second flow splitter plates in the first direction is 0.8-0.9 of the distance between the first and second side walls.
4. The test bed of claim 3, wherein when the flow rate of the air flow in the air inlet chamber is greater than or equal to the predetermined value, the first and second flow splitter plates are spaced apart from each other 2/3 the distance between the first and second side walls in the first direction, and when the flow rate of the air flow in the air inlet chamber is less than the predetermined value, the first and second flow splitter plates are spaced apart from each other 8/9 the distance between the first and second side walls in the first direction.
5. The test stand of claim 1, wherein the air intake chamber has an inlet end and an outlet end opposite along a length thereof, the outlet end being in communication with the outlet chamber, the first and second splitter plates being of equal length, one end of the first splitter plate being disposed at the outlet end, the other end of the first splitter plate being adjacent to or disposed at the inlet end, one end of the second splitter plate being disposed at the outlet end, the other end of the second splitter plate being adjacent to or disposed at the inlet end.
6. The test stand of claim 5, wherein the one end of the first splitter plate is aligned with a top end of the blade and the one end of the second splitter plate is aligned with a top end of the blade along a length of the air inlet chamber.
7. The test stand of claim 5, wherein the length of the first splitter plate is equal to or greater than 5 times the chord length of the blade.
8. The test rig of claim 1, wherein the length of the air outlet cavity is 100% -200% of the chord length of the blade.
9. The test bed according to claim 1, wherein the through holes are circular holes, the diameter of each through hole is 0.8-1.2mm, a plurality of through holes are uniformly arranged between two adjacent blades, and the distance between the adjacent through holes is 4-6 mm.
10. The test stand of any of claims 1-9, wherein an axial direction of the through-hole is substantially perpendicular to a length direction of the air intake cavity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280994A (en) * | 2021-06-15 | 2021-08-20 | 中国科学院工程热物理研究所 | Low-pressure turbine wake sweeping device capable of accurately simulating incoming flow boundary layer state |
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