Unsteady plasma excitation layout design method for inhibiting compressor stall

Abstract

The invention discloses an implementation method of an unsteady plasma excitation layout. The method comprises the steps of obtaining flow characteristics of a blade tip area of a compressor rotor under a near stall condition by utilizing numerical simulation; determining the change rule of the direction of the volume force formed by plasma excitation induction based on the flow characteristics ofthe blade tip area of the compressor rotor under the near stall condition; and obtaining a bent plasma excitation layout according to the curve of the function f(t). According to the method, an unsteady plasma excitation layout is designed on the basis of the flow characteristics of the rotor blade tip of the near-stall-point compressor, the direction of the plasma excitation induced volume forcecontinuously changes in the circumferential direction and is always perpendicular to the main / backflow interface, unsteady excitation of the flow field of the blade tip area of the compressor rotor is achieved, and thus efficient inhibition of compressor stall is achieved.

Description

technical field [0001] The invention relates to plasma technology, in particular to an unsteady plasma excitation layout design method for suppressing compressor stall. Background technique [0002] With the continuous increase of compressor stage pressure ratio and aerodynamic load, the strong reverse pressure gradient leads to more complex secondary flow and separation structure inside the compressor, often causing strong flow loss and blockage, and maintaining the necessary stall margin is become extremely difficult. In order to ensure sufficient stall margin for high-load compressors, many attempts have been made from the perspective of aerodynamic design, such as: low aspect ratio and high consistency design, curved and swept shape, large and small blades, etc. Because these passive control measures are difficult to effectively control the compressor stall in the full operating conditions of the engine, it is still a huge challenge to rely solely on it to break through...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of insufficient ability of plasma excitation to suppress compressor stall in the prior art, the present invention designs an unsteady plasma excitation layout based on the complex flow in the compressor rotor tip area under near-stall conditions, which can effectively improve the plasma excitation Ability to suppress compressor stall

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