Unsteadiness control of laminar junction flows on pressure fluctuations

doi:10.1007/s10483-019-2447-6

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 LIU^1,2, Shucheng ZHAI^1,2, E. KUDASHEV³, Fangwen HONG^1,2, Kai YAN¹

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)

Abstract

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

2010 MSC Number:

76D17
76E09

Jianhua LIU, Shucheng ZHAI, E. KUDASHEV, Fangwen HONG, Kai YAN. Unsteadiness control of laminar junction flows on pressure fluctuations. Applied Mathematics and Mechanics (English Edition), 2019, 40(3): 373-380.

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References

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Unsteadiness control of laminar junction flows on pressure fluctuations

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