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| NUMERICAL SIMULATION OF FLOW PATTERNS IN PLANAR JETS | |
| 作者姓名： | K. S. Lau Yi Liu Yin Cheng Guo C. K. Chan Wen Yi Lin |
| 作者单位： | K. S. Lau 1) Yi Liu 1，2) Yin Cheng Guo 2) C. K. Chan 3) Wen Yi Lin 2) 1) Department of Applied Physics，The Polytechnic University，Hong Kong，China 2) Department of Engineering Mechanics，Tsinghua University，Be |
| 基金项目： | Beijing Natural Science Foundation(No.3 982 0 0 8) |
| 摘 要： | INTRODUCTIONTurbulent jet flow is the most widely usedflow type in engineering applications especiallyfor combustion engines which provide most ener-gy sources for industrial production and trans-portation,and a large proportion of energy trans-portation and conversion processes is dominatedby transient evolution of large- scale structures,or so called coherent structures,in turbulentjets.As the flow control and optimization pro-cesses are closely related to the understanding ofdetailed in… |
NUMERICAL SIMULATION OF FLOW PATTERNS IN PLANAR JETS |
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| K. S. Lau Yi Liu , Yin Cheng Guo C. K. Chan Wen Yi Lin .NUMERICAL SIMULATION OF FLOW PATTERNS IN PLANAR JETS[J].Transactions of Nanjing University of Aeronautics & Astronautics,2001,18(Z1). | |
| Authors: | KSLau Yi Liu Yin Cheng Guo CKChan Wen Yi Lin |
| Institution: | 1. Department of Applied Physics, The Polytechnic University, Hong Kong, China 2. Department of Applied Physics, The Polytechnic University, Hong Kong, China;Department of Engineering Mechanics, Tsinghua University, Beijing 100084,P. R. China 3. Department of Engineering Mechanics, Tsinghua University, Beijing 100084,P. R. China 4. Department of Applied Mathematics, The Polytechnic University, Hong Kong, China |
| Abstract: | Two dimensional spatial developing turbulent planar jets with different velocity ratios of jet fluid to co flow fluid at the inlet section are simulated with large eddy simulation give detailed information of transient behaviors of coherent structures in turbulent jets and depict how the velocity ratios will affect the evolution of coherent structures. The motion of small scale structures is described by the standard Smagorinsky SGS model. Transport equation of passive scalar is also solved in order to perform numerical visualization of flow field. Transient distributions of velocity are obtained at different evolution periods of turbulent jets. Evolutions of coherent structures in flow field are also given in this paper as well as the comparison of flow patterns among three different velocity ratios. |
| Keywords: | large eddy simulation planar jet coherent structure |
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