全叶高合成双射流对大折转角扩压叶栅的影响
收稿日期: 2022-06-30
修回日期: 2022-07-27
录用日期: 2022-09-23
网络出版日期: 2022-09-30
基金资助
国家自然科学基金(52075538);国家科技重大专项(J2019-II-0016-0037);国防科技大学基金(ZK-22-30)
Influence of full⁃span dual synthetic jets on high⁃turning compressor cascade
Received date: 2022-06-30
Revised date: 2022-07-27
Accepted date: 2022-09-23
Online published: 2022-09-30
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)
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流场的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特性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,控制效果明显。其中射流槽位置是影响控制效果的关键因素。当合成双射流施加在原始叶栅的分离涡强度较大且分离涡充分发展的位置时,控制效果最好。合理的激励频率可进一步提升控制效果。全叶高的合成双射流控制可使总压损失系数最大降低54.8%。
朱寅鑫 , 彭文强 , 罗振兵 , 康赢 , 赵志杰 , 程盼 , 刘杰夫 . 全叶高合成双射流对大折转角扩压叶栅的影响[J]. 航空学报, 2023 , 44(12) : 127734 -127734 . DOI: 10.7527/S1000-6893.2022.27734
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%.
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