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.
Shucheng ZHAI
,
Kai YAN
,
Jianhua LIU
,
Fangwen HONG
,
E. KUDASHEV
. Unsteadiness control of laminar junction flows on pressure fluctuations[J]. Applied Mathematics and Mechanics, 2019
, 40(3)
: 373
-380
.
DOI: 10.1007/s10483-019-2447-6
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