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Volume 33 Issue 01
Jan.  2007
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Journal of Beijing University of Aeronautics and Astronautics  > 2007  >  33(01): 5-9.
Liu Yanming, Wu Naiming, Dong Jinzhong, et al. Process mechanism of synthetic jet and its effect on the mixing in coaxial jets[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(01): 5-9. (in Chinese)
Citation: Liu Yanming, Wu Naiming, Dong Jinzhong, et al. Process mechanism of synthetic jet and its effect on the mixing in coaxial jets[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(01): 5-9. (in Chinese)
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Process mechanism of synthetic jet and its effect on the mixing in coaxial jets

  • School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 19 Jan 2006
  • Publish Date: 31 Jan 2007
    Abstract
  • Two-dimensional unsteady numerical simulation was carried out to inve s tigate the flowfields surrouding a synthetic jet actuator and its effect on the mixing in coaxial jets. The synthetic jet flowfield and the coaxial jets flowfie ld were investigated. The results show synthetic jet comprises a series of vorte x pairs, which distribute around the centerline symmetrically. Its frequency kee p same to the actuator′s frequency. This is a disturbed force for the outer flo w field. The movement velocity of vortex pairs is nearly constant. The formation a nd development of the outer flowfield have the same rule as that of the inner fl owfield. But they are opposite to each other at the certain moment. As a result of actuating device, the centerline velocity distribution shows that the amplitu de decreases gradually, which represents the radical characteristic of vorticity d evelopment. The mixing ratio of coaxial jets increases comparatively because of the synthetic jet actuators, and the mixing effects in coaxial jets also become more agreeable.

     

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    • References(1)
  • [1] Kral L D, Donovan J F, Cain A B, et al. Numerical simul ation of synthetic jet actuators . AIAA-97-1824, 1997 [2] Lee Y, Goldstein B. Two-dimensional synthetic jet simulation . AIAA -2000-0406, 2000 [3] Cui Jing, Agarwal K, Guo Dahai, et al. Numerical simulation of behavior o f synthetic jets in cross-flow . AIAA-2003-1264, 2003 [4] Rizzetta P, Visbal R, Stanek J. Numerical investigation of synthetic jet flowfields . AIAA-98-2910, 1998 [5] Smith B L, Glezer A. Vectoring and small-scale motions effected in free shear flows using synthetic jet actuators . AIAA-97-0213, 1997 [6] Ritchie B D, Mujumder D R, Seitzman J M. Mixing in coaxial jets using syn thetic jet actuators . AIAA-2000-0404, 2000 [7] 何高让, 汪 亮. 微射流作动器出口流场数值模拟[J]. 空气动力学学报, 2000,18(4):395-400 He Gaorang, Wang Liang. Numerical simulation of outlet flow field of mircojet ac tuators[J]. ACTA Aerodynamica SINICA, 2000,18(4):395-400(in Chinese) [8] 罗振兵, 夏智勋, 胡建新, 等. 合成射流流场数值模拟及激励器参数分析 . 推进技术, 2004,25(3):199-205 Luo Zhenbing, Xia Zhixun, Hu Jianxin, et al. Numerical simulation of synthetic j et flow field and parameter analysis of actuator[J]. Journal of Propulsion Tec hnology, 2004,25(3):199-205 (in Chinese)
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