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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (12): 127734-127734.doi: 10.7527/S1000-6893.2022.27734

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Influence of full⁃span dual synthetic jets on high⁃turning compressor cascade

Yinxin ZHU, Wenqiang PENG, Zhenbing LUO(), Ying KANG, Zhijie ZHAO, Pan CHENG, Jiefu LIU   

  1. College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China
  • Received:2022-06-30 Revised:2022-07-27 Accepted:2022-09-23 Online:2022-10-08 Published:2022-09-30
  • Contact: Zhenbing LUO E-mail:luozhenbing@163.com
  • Supported by:
    National Natural Science Foundation of China(52075538);National Science and Technology Major Project(J2019-II-0016-0037);Foundation of National University of Defense Technology(ZK-22-30)

Abstract:

To effectively improve the performance of the high-turning cascade, a numerical simulation investigation on using dual synthetic jets for controlling the cascade loss is conducted. The effects of jet slot position, injection coefficient and excitation frequency on the control effect of dual synthetic jets are investigated.Results show that dual synthetic jets can change the asymmetrical separation structure of the baseline cascade into a symmetrical structure. The periodic blowing and suction of the dual synthetic jets can cause periodical shedding of the separation vortex on the suction side of the blade. Thus, the loss in the blade passage is significantly reduced. There is an effective control range for the position of the jet slots and the injection coefficient, within which the control effect is significant. Among them, the position of the jet slot is the key factor affecting the control effect. The best control effect can be achieved when the dual synthetic jets are applied at the position where the strength of separation vortex in the original blade is great and the vortex is fully developed. The reasonable excitation frequency can further improve the control effect. Full-span dual synthetic jets can reduce the total pressure loss coefficient by up to 54.8%.

Key words: dual synthetic jets, flow control, high-turning cascade, compressor, stator cascade, total pressure loss

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