Large eddy simulation of compressible turbulent channel flow with spanwise wall oscillation |
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Authors: | Jian Fang LiPeng Lu and Liang Shao |
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Institution: | (1) National Key Laboratory on Aero-engines, School of Jet Propulsion, Beihang University, Beijing, 100191, China;(2) Laboratory of Fluid Mechanics and Acoustics, Ecole Centrale de Lyon, Lyon, France |
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Abstract: | The influences of the modification of turbulent coherent structures on temperature field and heat transfer in turbulent channel
flow are studied using large eddy simulation (LES) of compressible turbulent channel flows with spanwise wall oscillation
(SWO). The reliability of the LES on such problems is proved by the comparisons of the drag reduction data with those of other
researches. The high consistency of coherent velocity structures and temperature structures is found based on the analyses
of the turbulent flow field. When the coherent velocity structures are suppressed, the transportations of momentum and heat
are reduced simultaneously, demonstrating the same trend. This shows that the turbulent coherent structures have the same
effects on the transportations of momentum and heat. The averaged wall heat flux can be reduced with appropriate oscillating
parameters.
Supported by the Key Subjects of National Natural Science Foundation of China (Grant No. 10732090), the National Natural Science
Foundation of China (Grant No. 50476004), and the 111 Project (Grant No. B08009) |
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Keywords: | large eddy simulation spanwise wall oscillation compressible temperature field heat transportation |
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