Joint adjustment method for spray pipe and test section in plane cascade subsonic velocity test device

Abstract

The invention discloses a joint adjustment method for a spray pipe and a test section in a plane cascade subsonic velocity test device. According to the joint adjustment method, joint adjustment of the height of an outlet of the spray pipe and the heights of upper and lower wall plates of a test section is realized through a height adjuster in the height-adjustable acoustic velocity spray pipe and a wall plate angle adjuster of a subacoustic velocity test cabin. Length adjustment of upper and lower wall plates of the test section is realized through a wall plate length adjuster of the subsonic velocity test cabin. According to the joint adjustment method, joint adjustment of the height of the outlet of the subsonic nozzle and the heights and lengths of the upper and lower wall plates of the test section can be conveniently and quickly realized, the requirements of subsonic aerodynamic performance test research and technical verification of various planar cascades are met, the test preparation time is saved, and the test efficiency is improved.

Description

technical field [0001] The invention belongs to the field of test equipment for basic research of aero-engines, and in particular relates to a method for joint adjustment of a nozzle and a test section in a plane cascade subsonic test device. 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 that can simulate parameters such as the Mach number and Reynolds number of the ...

AI Technical Summary

Problems solved by technology

The existing planar subsonic cascade test device, because most of the sonic nozzles are solid nozzles, does not have the function of adjusting the height of the nozzle outlet. The outlet is connected to transition sections of different heights and replaced with different lengths of the upper and lower walls of the test section. This method of adjusting the height of the nozzle and the upper and lower walls of the test section brings many disadvantages: 1. The connection between the transition sections of different heights and the nozzle will cause nozzle Sudden changes in outlet size and steps lead to poor flow field quality in the test section and reduced test accuracy; 2. When changing the test state, it is necessary to frequently replace the upper and lower wall panels of different height transition sections and different lengths of the test section, which is extremely inconvenient to operate and labor-intensive. The strength is high and the test efficiency is low; 3. The continuous adjustment of the height of the nozzle and the height of the test section cannot be realized, and the continuous adjustment of the length of the upper and lower wall panels of the test section cannot be realized, which may cause some test conditions to be unrealized

Images