Unsteadiness control of laminar junction flows on pressure fluctuations

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 fra...

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Bibliographic Details
Published inApplied mathematics and mechanics Vol. 40; no. 3; pp. 373 - 380
Main Authors Liu, Jianhua, Zhai, Shucheng, Kudashev, E., Hong, Fangwen, Yan, Kai
Format Journal Article
LanguageEnglish
Published Shanghai Shanghai University 01.03.2019
Springer Nature B.V
National Key Laboratory on Ship Vibration & Noise, Wuxi 214082,Jiangsu Province, China%Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia%China Ship Scientific Research Center, Wuxi 214082, Jiangsu Province, China
China Ship Scientific Research Center, Wuxi 214082, Jiangsu Province, China
EditionEnglish ed.
Subjects
Applications of Mathematics
Classical Mechanics
Flow visualization
Fluid dynamics
Fluid flow
Fluid- and Aerodynamics
Horseshoe vortices
Image acquisition
Laminar flow
Mathematical Modeling and Industrial Mathematics
Mathematics
Mathematics and Statistics
Partial Differential Equations
Particle image velocimetry
Pressure effects
Smoke
Two dimensional flow
Variation
Velocity distribution
Velocity measurement
horseshoe vortex
flow visualization
pressure fluctuation
O357.4
76D17
junction flow
76E09
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Summary: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.
ISSN:0253-4827
1573-2754
DOI:10.1007/s10483-019-2447-6