An experimental platform for aero-engine turbine active clearance control casing model verification

Abstract

The invention discloses an aero-engine turbine active clearance control casing model verification test bench, comprising an air supply module, a thermal environment simulation module, a measurement module and a controllable thermal deformation casing model test piece, wherein the air supply module is used to provide The cooling gas on the outer surface of the experimental part of the controllable thermal deformation casing model is used to simulate the compressor bleed air on the outer surface of the casing in the ACC system; the thermal environment simulation module is used to heat the inner surface of the experimental part of the controllable thermal deformation casing to simulate the engine The heating effect of the high temperature gas in the turbine on the casing after contacting the outer ring; the measurement module is used to measure the pressure, flow rate and temperature of the cooling gas, the temperature of the outer surface of the experimental part of the casing model with controllable thermal deformation, and the controllable heat The thermal deformation of the deformable casing model test piece; the controllable thermal deformation casing model test piece is used to simulate the casing in the ACC system. The present invention can visually verify the implementation effect of the ACC design scheme, and provides important technical support for the further engineering application of the scheme.

Description

technical field [0001] The invention relates to the technical field of aero-engine turbine active clearance control, in particular to a casing model verification test bench for an aero-engine turbine active clearance control system. Background technique [0002] The tip active clearance control technology (Active Clearance Control, hereinafter referred to as ACC) can realize the adjustment of the tip clearance, which is of great significance for reducing engine fuel consumption and improving engine performance and reliability. At present, most of the ACC technologies used in aeroengines are based on controllable thermal deformation casing schemes, such as CFM56, V2500 and PW400 series engines (Zeng Jun, Wang Pengfei. Analysis of active control technology of civil aeroengine turbine tip clearance[J] .Aeronautical Science and Technology,2012,24(2):1-6)(Bradbury L J S.The Structure of a self-preservingturbulent plane jet[J].Journal of Fluid Mechanics,1965,23(1):31-64) . That ...

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Problems solved by technology

However, if the experimental scheme with a turbine rotor is still adopted at this time, due to the high rotational speed of the blades, discs and other rotors, the problems of vibration, safety and axial force balance will be more prominent. Therefore, the model experiments of foreign ACC systems In the above, the rotor components are not considered, and the focus is on the temperature distribution and deformation test research of the casing components, just as the experimental work carried out by Gaffin

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