Preliminary experiment of suppressing flow separation in cascade by micro pulsed jet without external device
-
摘要: 基于一种适用于高负荷压气机的无源微脉冲射流控制技术,在平面叶栅实验平台上开展了低马赫数实验研究,得到了无流动控制时叶栅通道内稳态及动态压力特性.对该分离流场(通道内分离涡主频为478Hz,对应的斯特劳哈尔数Sr约为0.2)进行了无源微脉冲射流控制通道内气流分离的实验研究,并针对148Hz到840Hz频率范围内的无源微脉冲射流控制分离流的效果进行了实验测量分析.实验结果表明:在分离涡主频0.85~1.20频率范围内,控制效果最为明显;相比于开缝吹气等定常射流控制方式,无源微脉冲射流控制方式引气流量小,大幅降低了引气对压力面流动特征及叶栅总体性能的影响.Abstract: Based on a micro pulsed jet without external device control technology suitable for high-load compressor, experimental investigation at low Mach number state was carried out on the cascade tunnel, and the steady and dynamic pressure characteristics in no-control state were obtained. The characteristic frequency of the separated vortex was found to be about 478Hz, and the corresponding Strouhal number was about 0.2. The experiment of controlling separation flow by micro pulsed jet was performed, with the frequency of the micro pulsed jet from 148Hz to 840Hz. Results show that when the frequency of the micro pulsed jet ranges from 0.85 to 1.20 of characteristic frequency of the separated vortex, the control effect is more obvious. Compared with blade slot treatment in other steady control methods, the suction mass flow ratio of this micro pulsed control method is few, and the influence of suction phenomena on the flow characteristics of pressure side and overall performance has been decreased significantly.
-
Key words:
- micro pulsed jet /
- unsteadiness /
- flow separation /
- plane cascade /
- low Mach number
-
[1] Rivir R B, Bons J P, Lake J P.Passive and active control of separation in gas turbines[R].AIAA-2000-2235, 2000. [2] 郭明, 郑晓宇, 周盛, 等.BVF在吹气控制压气机叶栅分离流中的应用[J].航空动力学报, 2008, 23(8):1498-1503. GUO Ming, ZHANG Xiaoyu, ZHOU Sheng, et al.BVF application on blowing control of flow separation of a compressor cascade[J].Journal of Aerospace Power, 2008, 23(8):1498-1503.(in Chinese) [3] Hoeger M, Baier R D, Fischer S, et al.High turning compressor tandem cascade for high subsonic flows:Part 1 aerodynamic design[R].AIAA-2011-5601, 2011. [4] Müller L, Kožulovi Dćy D, Wulff D, et al.High turning compressor tandem cascade for high subsonic flows:Part 2 numerical and experimental investigations[R].AIAA-2011-5602, 2011. [5] Schuler B J, Kerrebrock J L, Merchant A.Experimental investigation of a transonic aspirated compressor[J].Journal of Turbomachinery, 2005, 127(4):340-348. [6] Greenblatt D, Wygnanski I J.The control of flow separation by periodic excitation[J].Progress in Aerospace Sciences, 2000, 36(7):487-545. [7] Culley D E, Bright M M, Prahst P S, et al.Active flow separation control of a stator vane using embedded injection in a aultistage compressor experiment[J].Journal of Turbomachinery, 2004, 126(1):24-34. [8] Zheng X Q, Zhou X B, Zhou S.Investigation on a type of flow control to weaken unsteady separated flows by unsteady excitation in axial flow compressors[J].Journal of Turbomachinery, 2005, 127(7):489-496. [9] Hecklau M, Wiederhold O, Zander V, et al.Active separation control with pulsed jets in a critically loaded compressor cascade[R].AIAA-2010-4252, 2010. [10] Gmelin C, Zander V, Huppertz A, et al.Active flow control concepts on a highly loaded subsonic compressor cascade:resume of experimental and numerical results[R].ASME Paper GT2011-46468, 2011. [11] 黄国平, 陈杰, 夏晨, 等.抑制压气机叶背分离的无源脉冲射流器:中国, ZL200810195408.3[R].2011-10-30. [12] 朱剑锋, 黄国平, 傅鑫, 等.一种控制气流分离的无源微脉冲射流技术研究[J].航空学报, 2013, 34(8):1757-1767. ZHU Jianfeng, HUANG Guoping, FU Xin, et al.Investigation of technology for controlling flow separation by micropulsed-jet without external device[J].Acta Aeronautica et Astronautica Sinica, 2013, 34(8):1757-1767.(in Chinese) [13] 侯安平, 周盛.对圆柱和二维扩压叶栅在平面叶栅风洞中旋涡脱落的试验研究[J].空气动力学学报, 2004, 22(1):101-108. HOU Anping, ZHOU Sheng.A study on vortex shedding frequency of blade profile and cylinder in cascade tunnel[J].Acta Aerodynamica Sinica, 2004, 22(1):101-108.(in Chinese) [14] 张华良.采用叶片弯/掠及附面层抽吸控制扩压叶栅内涡结构的研究[D].哈尔滨:哈尔滨工业大学, 2004. ZHANG Hualiang.Investigation on application of dihedral/swept blade and boundary layer suction to control vortex configuration in compressor cascades[D].Harbin:Harbin Institute of Technology, 2004.(in Chinese) [15] Zhu J F, Huang G P, Fu X, et al.Use of POD to elucidate the physics of unsteady micro-pulsed-jet flow for boundary layer flow separation control[R].ASME Paper GT2013-95266, 2013.
点击查看大图
计量
- 文章访问数: 1597
- HTML浏览量: 3
- PDF量: 931
- 被引次数: 0