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Improved avdr variable suction position cascade experimental device and suction control method

An experimental device and a variable technology, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., can solve problems such as complex procedures, high cost, long cycle, etc., to improve duality, reduce Cost, the effect of excellent sealing

Active Publication Date: 2022-05-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If wind tunnel experiments are carried out on conventional test pieces to find the best suction position and realize distributed suction, it is necessary to process multiple sets of cascade test pieces with specific suction slots for comparison, and design distributed suction slots based on the comparison results , high cost, long period, complicated procedures

Method used

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  • Improved avdr variable suction position cascade experimental device and suction control method
  • Improved avdr variable suction position cascade experimental device and suction control method
  • Improved avdr variable suction position cascade experimental device and suction control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Embodiment 1: This embodiment is a variable suction position cascade experimental device for improving AVDR, which can change the circumferential suction position of the cascade.

[0073] The assembly process of the experimental device:

[0074] Step 1: Install the plugs of the 8 vanes except for the static pressure in the leftmost 4 slots and the rightmost 4 slots of the grid plate 4; install the plugs of the vane 2 with static pressure holes on the suction surface There are two slots in the middle of grid plate 4, and the measurement surfaces of the two static pressure holes are opposite.

[0075] Step 2: Place the second-layer partition 5 between the bosses of the grid plate 4, and according to the experimental requirements, place a #0 sealing pad in the corresponding non-suction position of the three axial pad cavities 5.3 in the middle to seal The suction holes of the grid plate at the corresponding positions, and the corresponding suction pads are placed at the s...

Embodiment 2

[0082] Embodiment 2: This embodiment is a variable suction position cascade experimental device for improving AVDR, which can change the axial suction position of the cascade.

[0083] The assembly process of the experimental device:

[0084] Step 1: Install the plugs of the 8 vanes except for the static pressure in the leftmost 4 slots and the rightmost 4 slots of the grid plate 4; install the plugs of the vane 2 with static pressure holes on the suction surface There are two slots in the middle of grid plate 4, and the measurement surfaces of the two static pressure holes are opposite.

[0085] Step 2: Place the second-layer separator 5 between the bosses of the grid plate 4, and place suction spacers #1#2#3#4 in sequence in the three axial spacer cavities 5.3 in the middle to maintain suction The holes are unblocked to avoid mixing of fluids from different suction holes.

[0086] Step 3: Place the three-layer partition 6 on the second-layer partition 5, with the side of t...

Embodiment 3

[0093] Embodiment 3: This embodiment is a variable suction position cascade experimental device for improving AVDR, which can change the circumferential suction position and axial suction position of the cascade.

[0094] The assembly process of the experimental device:

[0095] Step 1: Install the plugs of the 8 vanes except for the static pressure in the leftmost 4 slots and the rightmost 4 slots of the grid plate 4; install the plugs of the vane 2 with static pressure holes on the suction surface There are two slots in the middle of grid plate 4, and the measurement surfaces of the two static pressure holes are opposite.

[0096] Step 2: Place the second-layer partition 5 between the bosses of the grid plate 4, and according to the experimental requirements, place a #0 sealing pad in the corresponding non-suction position of the three axial pad cavities 5.3 in the middle to seal The suction holes of the grid plate at the corresponding positions, and the corresponding sucti...

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Abstract

The invention provides a variable suction position cascade experimental device and a suction control method for improving AVDR, which belong to the field of cascade experiments. Cover plate, distance column, vane, circumferential slider, axial pad, suction rod, distributed suction adjustment mechanism and suction control system. The second-layer baffle is used in conjunction with the axial pad to change the circumferential suction position; the third-layer baffle is used in conjunction with the circumferential slider to change the axial suction position. The cover plate and the three-layer partition form a complete suction chamber. The distributed suction adjustment mechanism uses the screw to drive the axial displacement of the compartment partition, divides the suction chamber into multiple chambers, and realizes distributed suction. The advantages are: 1) more fixing pins with simple structure are used, and the adjustment is convenient. 2) Screw drive for easy fine adjustment. 3) Thread seal, step seal and gasket seal achieve excellent sealing performance. The present invention can effectively solve the problems raised in the background art.

Description

technical field [0001] The invention relates to the field of cascade wind tunnel experiments, in particular to a variable suction position cascade experimental device and a suction control method for improving AVDR. Background technique [0002] With the increasing load of aero-engines, the design of high-pressure ratio and high-efficiency compressors is crucial. As the unit of "function-function" transmission, the blade is formed by stacking the primitive blade shape along the stacking line. The planar cascade experiment is the key link of the primitive blade shape, which is to obtain the binary aerodynamic performance of the designed blade shape. [0003] However, in the flat compressor cascade experiment, the diffuser of the cascade will cause the side wall boundary layer to thicken sharply and may separate, and the real flow channel shrinks to force the air flow to the center of the blade span, resulting in an acceleration contrary to expectations. The duality is destro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/02G01M9/04
CPCG01M9/02G01M9/04
Inventor 高丽敏刘哲蔡明黎浩学姜衡
Owner NORTHWESTERN POLYTECHNICAL UNIV
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