Combined design method for peripheral slots of transonic-speed axial-flow gas compressor receiver

Abstract

The invention discloses a combined design method for peripheral slots of a transonic-speed axial-flow gas compressor receiver, and the combined design methods adopts an analysis model to perform quantitative evaluation on mixing loss of leakage flow, avoids adopting an enumeration method to perform much numerical simulation on a scheme of combining a plurality of peripheral slots, and greatly improves design efficiency of the combining scheme. The combined design method comprises the following specific technical means: I, performing segment processing on blade-tip leakage flow according to numerical value simulated results of the smooth-wall receiver; II, adopting a control body analysis method and obtaining mixing loss which corresponds to leakage flow of each segment through a control equation set; and III, comparing an equivalent loss coefficient which corresponds to each segment gap, sequencing the segments according to the sizes of the loss coefficients, forming peripheral slots in regions with relatively great loss coefficients, thereby obtaining the peripheral slot combining scheme with relatively superior efficiency. The combined design method can be used for receiver processing optimizing design research of the transonic-speed axial-flow gas compressor receiver, and is especially suitable for evaluating gas compressor peak-value efficiency loss caused by receiver processing.

Description

technical field [0001] The invention relates to a design method for combining circumferential grooves of casings of transonic axial flow compressors with better efficiency, and belongs to the field of aerodynamic design of compressors. Background technique [0002] As an important component of an aeroengine, the axial flow compressor plays an important role in increasing the intake pressure of the combustion chamber and improving the propulsion efficiency. With the development of aero-engines towards high thrust-to-weight ratio and low fuel consumption, high-load compressors have become one of the key technologies of advanced aero-engines. However, as the compressor load increases, its stability margin becomes narrower, which affects the safe operation of the engine. For this reason, research designers use various flow control methods to widen the stability margin of the compressor, and one of the most important passive control methods is casing processing. [0003] Case t...

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Problems solved by technology

However, the axial seam casing treatment leads to a non-axisymmetric end wall structure. Although a more obvious expansion and stability effect can be obtained, it will also cause a large efficiency loss.

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