Gas compressor high-altitude environment testing system and adjusting method

Abstract

The invention relates to an air compressor high-altitude environment test system and an adjusting method. The air compressor high-altitude environment test system comprises an air inlet temperature adjusting system, an air inlet pressure adjusting system, an exhaust system, a low-pressure test cabin, a power system, a transmission system, an exhaust heat exchange system, a test air compressor and the like. The air inlet temperature adjusting system, the air inlet pressure adjusting system and the low-pressure testing cabin are sequentially connected, the testing air compressor and the transmission system are both arranged in the low-pressure testing cabin, the power system is connected with the transmission system in the low-pressure testing cabin through a lamination coupling, and a transmission system casing is in sealing connection with a low-pressure testing cabin shell through a corrugated pipe structure. Low-pressure air and ambient atmosphere in the low-pressure test chamber are isolated, the rotor system is kept in the same temperature environment, the corrugated pipe can compensate thermal deformation of the casing, and the concentricity of a pivot of the rotor system is improved. According to the adjusting method, manual adjustment and PID automatic adjustment are combined to maintain the stability of the air inlet pressure and flow of the test air compressor, and therefore continuous and variable adjustment of the Reynolds number of the test air compressor is achieved.

Description

technical field [0001] The invention belongs to the technical field of aviation gas turbine engine simulation tests, and in particular relates to a compressor high-altitude environment test system and an adjustment method. Background technique [0002] The Reynolds number is one of the important criteria to measure the influence of fluid viscosity on the performance of aeroengine compression system and expansion system components. When the Reynolds number of the inlet airflow of the engine is greater than a certain critical value, the influence of the Reynolds number on the various components of the engine (including the fan, compressor and turbine) is basically negligible, so the flow rate, pressure ratio and efficiency of the compression system will basically not be affected. The influence of the change of Reynolds number; but when the engine inlet Reynolds number is less than this critical value, the influence of the change of Reynolds number on each component gradually a...

AI Technical Summary

Problems solved by technology

Problems in this type of test system include: how to ensure the gas seal between the interior of the low-pressure test chamber and the ambient atmosphere, how to automatically compensate the concentricity of the rotor fulcrum caused by the thermal deformation of the low-pressure test chamber and equipment, and how to maintain the compressor during the test Stable intake pressure, etc.

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