Applied Mathematics and Mechanics (English Edition) ›› 2019, Vol. 40 ›› Issue (3): 373-380.doi: https://doi.org/10.1007/s10483-019-2447-6

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Unsteadiness control of laminar junction flows on pressure fluctuations

Jianhua LIU1,2, Shucheng ZHAI1,2, E. KUDASHEV3, Fangwen HONG1,2, Kai YAN1   

  1. 1. China Ship Scientific Research Center, Wuxi 214082, Jiangsu Province, China;
    2. National Key Laboratory on Ship Vibration & Noise, Wuxi 214082, Jiangsu Province, China;
    3. Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia
  • 收稿日期:2018-09-10 修回日期:2018-11-16 出版日期:2019-03-01 发布日期:2019-03-01
  • 通讯作者: Jianhua LIU E-mail:jhliu@cssrc.com.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Nos. 11102188 and 91852101)

Unsteadiness control of laminar junction flows on pressure fluctuations

Jianhua LIU1,2, Shucheng ZHAI1,2, E. KUDASHEV3, Fangwen HONG1,2, Kai YAN1   

  1. 1. China Ship Scientific Research Center, Wuxi 214082, Jiangsu Province, China;
    2. National Key Laboratory on Ship Vibration & Noise, Wuxi 214082, Jiangsu Province, China;
    3. Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia
  • Received:2018-09-10 Revised:2018-11-16 Online:2019-03-01 Published:2019-03-01
  • Contact: Jianhua LIU E-mail:jhliu@cssrc.com.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 11102188 and 91852101)

摘要: Smoke-wire flow visualization is conducted carefully in a laminar junction to explore the physical behavior of laminar junction flows. The two-dimensional (2D) velocity fields in the 30° plane of a laminar junction flow are acquired by a time-resolved particle image velocimetry (PIV) system at a frame rate of 1 kHz, based on which the unsteady fluctuating pressure fields can be calculated by the multi-path integration method proposed in the literature (GAND, F., DECK, S., BRUNET,V., and SAGAUT, P. Flow dynamics past a simplified wing body junction. Physics of Fluids, 22(11), 115111 (2010)). A novel control strategy is utilized to attenuate the unsteadiness of the horseshoe vortices of the laminar junction flow, and the consequent effect on pressure fields is analyzed.

关键词: multibodies problem, dynamic model, dynamics of robot, junction flow, flow visualization, horseshoe vortex, pressure fluctuation

Abstract: Smoke-wire flow visualization is conducted carefully in a laminar junction to explore the physical behavior of laminar junction flows. The two-dimensional (2D) velocity fields in the 30° plane of a laminar junction flow are acquired by a time-resolved particle image velocimetry (PIV) system at a frame rate of 1 kHz, based on which the unsteady fluctuating pressure fields can be calculated by the multi-path integration method proposed in the literature (GAND, F., DECK, S., BRUNET,V., and SAGAUT, P. Flow dynamics past a simplified wing body junction. Physics of Fluids, 22(11), 115111 (2010)). A novel control strategy is utilized to attenuate the unsteadiness of the horseshoe vortices of the laminar junction flow, and the consequent effect on pressure fields is analyzed.

Key words: multibodies problem, dynamic model, dynamics of robot, horseshoe vortex, flow visualization, junction flow, pressure fluctuation

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