An excitation layout optimization method for improving plasma excitation flow control efficiency

Abstract

A method for optimize a plasma excitation layout is disclosed. That plasma excitation is arranged into a suction surface excitation layout, an end wall excitation layout and a combined excitation layout. The benefits of plasma-excited flow control effects relative to the combined excitation distribution are calculated respectively. The larger the plasma-excited flow control effect is, the better the plasma-excited flow control effect is. The parameter Opg is defined to evaluate the energy consumption and flow control benefits of each plasma excitation comprehensively. The combination of plasmaexcitation with high efficiency of flow control is selected and applied to the cascade channel to obtain the optimized plasma excitation layout. The invention selects the combined excitation layout of the suction surface and the end wall as a reference, By considering the energy consumption and flow control benefit of the plasma excitations arranged on the suction surface and the end wall of theblade, the flow control efficiency of the plasma excitations is evaluated, and the optimized excitation layout is obtained to realize the efficient control of the flow separation in the high speed compressor cascade.

Description

technical field [0001] The invention relates to plasma technology, in particular to an excitation layout optimization method for improving plasma excitation flow control efficiency. Background technique [0002] The corner area generally refers to the junction of the compressor blades and the casing / hub. The three-dimensional angular area separation starting from the root of the rotor and the proximal end of the stator is an important source of compressor flow loss, which will cause strong flow blockage and large The lagging angle of the airflow limits the increase of the compressor load. The passive flow control method has a strong influence on the three-dimensional angular separation of the compressor. The three-dimensional angular separation can be significantly weakened within the specified working range through a reasonable design of the flow control scheme. However, the passive control method usually causes The redistribution of low-energy fluid or fluid momentum will...

AI Technical Summary

Problems solved by technology

The three-dimensional corner separation originates from the secondary flow and reverse pressure gradient in the blade channel, and is directly related to the load level of the blade. Therefore, it is difficult to effectively suppress it under the condition of high-speed incoming flow with the existing plasma excitation intensity. Therefore, the high-speed compressor Three-dimensional corner-separated plasma flow control requires a more efficient excitation layout

The formation mechanism of three-dimensional corner separation determines that the suppression of three-dimensional corner separation of high-speed compressors must require higher excitation intensity, and flow control measures with high power consumption are difficult to apply to practical engineering

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