| Large-eddy simulations and vortex structures of turbulent jets in crossflow |
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| 引用本文： | GUAN Hui1,2 & WU ChuiJie2 1 School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China,2 Research Center for Fluid Dynamics,PLA University of Science and Technology,Nanjing 211101,China. Large-eddy simulations and vortex structures of turbulent jets in crossflow[J]. 中国科学G辑(英文版), 2007, 50(1): 118-132. DOI: 10.1007/s11433-007-0005-2 |
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| 作者姓名： | GUAN Hui1 2 & WU ChuiJie2 1 School of Mechanical and Power Engineering East China University of Science and Technology Shanghai 200237 China 2 Research Center for Fluid Dynamics PLA University of Science and Technology Nanjing 211101 China |
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| 作者单位： | GUAN Hui1，2 & WU ChuiJie2 1 School of Mechanical and Power Engineering，East China University of Science and Technology，Shanghai 200237，China;2 Research Center for Fluid Dynamics，PLA University of Science and Technology，Nanjing 211101，China |
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| 基金项目： | 国家自然科学基金;江苏省自然科学基金 |
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| 摘 要： | Using the method of large-eddy simulation, the 3-dimensional turbulent jets in crossflow with stream-wise and transverse arrangements of nozzle are simulated, emphasizing on the dynamical process of generation and evolution of vortex structures in these flows. The results show that the basic vortex structures in literatures, such as the counter-rotating vortex pair, leading-edge vortices, lee-side vortices, hanging vortices, kidney vortices and anti-kidney vortices, are not independent physical substances, but local structures of the basic vortex structure of turbulent jets in crossflow-the 3-D stretching vortex rings originating from the orifice of the nozzle, which is discovered in this study. Therefore, the most important large-scale structures of turbulent jets in crossflow are unified to the 3-D vortex rings which stretch and twist in stream-wise and swing in transverse directions. We also found that the shedding frequencies of vortex rings are much lower than the one corresponding to the appearance of leading-edge and lee-side vortices in the turbulent jets.
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| 收稿时间： | 2005-04-28 |
| 修稿时间： | 2006-09-18 |
Large-eddy simulations and vortex structures of turbulent jets in crossflow |
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| Guan Hui,Wu ChuiJie. Large-eddy simulations and vortex structures of turbulent jets in crossflow[J]. Science in China(Physics Astronomy), 2007, 50(1): 118-132. DOI: 10.1007/s11433-007-0005-2 |
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| Authors: | Guan Hui Wu ChuiJie |
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| Affiliation: | 1. School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Research Center for Fluid Dynamics,PLA University of Science and Technology,Nanjing 211101,China
2. Research Center for Fluid Dynamics,PLA University of Science and Technology,Nanjing 211101,China |
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| Abstract: | Using the method of large-eddy simulation,the 3-dimensional turbulent jets in crossflow with stream-wise and transverse arrangements of nozzle are simulated,emphasizing on the dynamical process of generation and evolution of vortex structures in these flows.The results show that the basic vortex structures in literatures,such as the counter-rotating vortex pair,leading-edge vortices,lee-side vortices,hanging vortices,kidney vortices and anti-kidney vortices,are not independent physical substances,but local structures of the basic vortex structure of turbulent jets in crossflow-the 3-D stretching vortex rings originating from the orifice of the nozzle,which is discovered in this study.Therefore,the most important large-scale structures of turbulent jets in crossflow are unified to the 3-D vortex rings which stretch and twist in stream-wise and swing in transverse directions.We also found that the shedding frequencies of vortex rings are much lower than the one corresponding to the appearance of leading-edge and lee-side vortices in the turbulent jets. |
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| Keywords: | turbulent jet in crossflow coherent structure large-eddy simulation |
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