Unsteadiness control of laminar junction flows on pressure fluctuations  

作　　者：Jianhua LIU Shucheng ZHAI E.KUDASHEV Fangwen HONG Kai YAN 

机构地区：[1]China Ship Scientific Research Center [2]National Key Laboratory on Ship Vibration & Noise [3]Space Research Institute of Russian Academy of Sciences

出　　处：《Applied Mathematics and Mechanics(English Edition)》2019年第3期373-380,共8页应用数学和力学（英文版）

基　　金：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(2 D)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.Smoke-wire flow visualization is conducted carefully in a laminar junction to explore the physical behavior of laminar junction flows. The two-dimensional(2 D)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：JUNCTION FLOW HORSESHOE vortex pressure FLUCTUATION FLOW visualization 

分 类 号：O357.4[理学—流体力学]