首页|Investigation of control effects of end-wall self-adaptive jet on three-dimensional corner separation of a highly loaded compressor cascade

Investigation of control effects of end-wall self-adaptive jet on three-dimensional corner separation of a highly loaded compressor cascade

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To overcome the limitations posed by three-dimensional corner separation,this paper proposes a novel flow control technology known as passive End-Wall(EW)self-adaptive jet.Two single EW slotted schemes(EWS1 and EWS2),alongside a combined(COM)scheme featuring double EW slots,were investigated.The results reveal that the EW slot,driven by pressure differ-entials between the pressure and suction sides,can generate an adaptive jet with escalating velocity as the operational load increases.This high-speed jet effectively re-excites the local low-energy fluid,thereby mitigating the corner separation.Notably,the EWS1 slot,positioned near the blade leading edge,exhibits relatively low jet velocities at negative incidence angles,causing jet separation and exacerbating the corner separation.Besides,the EWS2 slot is close to the blade trailing edge,result-ing in massive low-energy fluid accumulating and separating before the slot outlet at positive inci-dence angles.In contrast,the COM scheme emerges as the most effective solution for comprehensive corner separation control.It can significantly reduce the total pressure loss and improve the static pressure coefficient for the ORI blade at 0°-4° incidence angles,while causing minimal negative impact on the aerodynamic performance at negative incidence angles.Therefore,the corner stall is delayed,and the available incidence angle range is broadened from-10°--2° to-10°-4°.This holds substantial promise for advancing the aerodynamic performance,operational stability,and load capacity of future highly loaded compressors.

Three-dimensional corner separationEnd-wall adaptive jetTotal pressure lossHighly loaded compressor cascadeCompressors

Hejian WANG、Bo LIU、Xiaochen MAO、Botao ZHANG、Zonghao YANG

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School of Power and Energy,Northwestern Polytechnical University,Xi'an 710129,China

The National Key Laboratory of Science and Technology on Aerodynamic Design and Research,Xi'an 710129,China

Taihang Laboratory,Chengdu 610000,China

National Natural Science Foundation of ChinaNational Major Science and Technology Projects of ChinaFundamental Research Funds for the Central Universities of ChinaFoundation of State Level Key Laboratory of Airfoil and Cascade Aerodynamics of ChinaFoundation of State Level Key Laboratory of Airfoil and Cascade Aerodynamics of ChinaInnovation Foundation for Doctor Dissertation of Northwestern Polytechnical University of China

521060572017-Ⅱ-0001-0013D5000210483D5150210006D5050210015CX2023012

2024

10.1016/j.cja.2024.04.009

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(6)
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