Height-adjustable plane cascade test section

Abstract

The invention discloses a height-adjustable plane cascade test section. The plane cascade test section is a square body and comprises a shell, two test section discs installed in the shell in parallel on the left side and the right side, two wall plate assemblies installed on the upper side and the lower side in the shell, and two groups of corresponding angle adjusters and pull rods. A space among the inner walls of the two test section discs, the two upper and lower wall plate assemblies and the two upper and lower length compensation plates is a test section. And the space between the outer walls of the two test section discs and the shell is a test section plenum chamber. The moving end of the angle adjuster drives the two upper and lower wall plate assemblies to rotate around the pin shaft so as to realize height and angle adjustment of the upper and lower wall plate assemblies of the test section. The plane cascade test section is comprehensive in function, convenient to operate, simple to position, high in accuracy and capable of saving test preparation time and improving test efficiency.

Description

technical field [0001] The invention belongs to the field of aero-engine basic research test equipment, in particular to a height-adjustable plane cascade test section. Background technique [0002] Aviation turbines (including fans / compressors and turbines) and gas turbines are key components for maintaining thermal cycles and generating thrust, and the aerodynamic shape of their rotor / stator blades determines the aerodynamic performance of aviation turbines and gas turbines. In order to design high-performance aerojet engines and gas turbines, it is necessary to study the design method and flow characteristics of the turbine at the cascade (two-dimensional airfoil) level. In order to conduct experimental research on cascade channel flow under real flight conditions on the ground, it is necessary to build ground equipment capable of simulating parameters such as the Mach number and Reynolds number of the cascade flow during actual flight, so as to ensure that it can be carr...

AI Technical Summary

Problems solved by technology

This method of adjusting the height of the test section brings many disadvantages: 1. The connection between the transition section of different heights and the nozzle will cause a sudden change in the outlet size of the nozzle and a step difference, resulting in the deterioration of the flow field quality in the test section and the reduction of test accuracy; 2. The connection of the upper and lower wall plates with different heights will also cause the variation of the flow channel step difference, resulting in the deterioration of the flow field quality of the test section and the decrease of test accuracy; 3. When changing the test state, it is necessary to frequently replace the transition sections of different heights and different The length of the upper and lower wall panels is extremely inconvenient to operate, the labor intensity is high, and the test efficiency is low; 4. The continuous adjustment of the height of the nozzle and the height of the test section cannot be realized, which may cause some test conditions to be unrealized

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