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全叶高合成双射流对大折转角扩压叶栅的影响

朱寅鑫1,彭文强2,罗振兵3,康赢1,赵志杰2,程盼2,刘杰夫2   

  1. 1. 国防科技大学
    2. 国防科技大学空天科学学院
    3. 国防科学技术大学航天科学与工程学院
  • 收稿日期:2022-06-30 修回日期:2022-09-26 出版日期:2022-09-30 发布日期:2022-09-30
  • 通讯作者: 彭文强
  • 基金资助:
    国家自然科学基金;国家科技重大专项;国防科技大学科研计划项目

Influence of full-span dual synthetic jets on the highly-turning compressor cascade

  • Received:2022-06-30 Revised:2022-09-26 Online:2022-09-30 Published:2022-09-30

摘要: 为有效改善大折转角扩压叶栅性能,通过数值计算方法对合成双射流控制叶栅损失进行了研究。分别探究了合成双射流的射流槽位置、射流动量系数、激励频率对控制效果的影响。结果表明:合成双射流可以将原始叶栅非对称分离结构变为对称结构,且合成双射流的周期性吹吸气可使吸力面表面的分离涡发生周期性脱落,从而显著降低通道内的损失。射流槽位置、射流动量系数存在有效控制范围,在有效控制范围内,控制效果显著提升,合理的激励频率可进一步提升控制效果。全叶高合成双射流可使总压损失系数最大降低54.8%。

关键词: 合成双射流, 流动控制, 大折转角叶栅, 压气机静叶栅, 总压损失

Abstract: In order to effectively improve the performance of the high-turning cascade, a numerical simulation investigation on the application of dual synthetic jets for controlling the cascade loss was conducted. The effects of jet slots position, injection coefficient and excitation frequency on the control effect of dual synthetic jets were investigated. Results show that the 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 the separation vortex on the suction side of the blade to periodically shed. 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 significantly improved. And the reasonable excitation frequency can further improve the control effect. Full-span dual synthetic jets reduce the total pres-sure 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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