| LARGE-SCALE VORTICAL STRUCTURES PRODUCED BY AN IMPINGING DENSITY JET IN SHALLOW CROSSFLOW |
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| 引用本文： | 樊靖郁,王道增,张燕. LARGE-SCALE VORTICAL STRUCTURES PRODUCED BY AN IMPINGING DENSITY JET IN SHALLOW CROSSFLOW[J]. 应用数学和力学(英文版), 2006, 27(3): 363-369. DOI: 10.1007/s 10483-006-0312-z |
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| 作者姓名： | 樊靖郁 王道增 张燕 |
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| 作者单位： | Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072，P. R. China，Shanghai Institute of Applied Mathematics and Mechanics Shanghai University，Shanghai 200072，P. R. China，SMIT Center Shanghai University，Shanghai 200072，P R China，Department of Applied Mechanics，Chalmers University of Technology，Gothenburg SE 412-96，Sweden |
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| 基金项目： | 上海市领先专业学科基金 |
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| 摘 要： | The large-scale vortical structures produced by an impinging density jet in shallow crossflow were numerically investigated in detail using RNG turbulence model. The scales, formation mechanism and evolution feature of the upstream wall vortex in relation to stagnation point and the Scarf vortex in near field were analyzed. The computed characteristic scales of the upstream vortex show distinguished three-dimensionality and vary with the velocity ratio and the water depth. The Scarf vortex in the near field plays an important role in the lateral concentration distributions of the impinging jet in crossflow. When the velocity ratio is relatively small, there exists a distinct lateral high concentration aggregation zone at the lateral edge between the bottom layer wall jet and the ambient crossflow, which is dominated by the Scarf vortex in the near field.
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| 关 键 词： | 大涡旋结构 碰撞密度射流 浅交叉流 浓度分布 |
| 收稿时间： | 2004-05-25 |
| 修稿时间： | 2005-11-15 |
Large-scale vortical structures produced by an impinging density jet in shallow crossflow |
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| Jing-yu Fan,Dao-zeng Wang,Yan Zhang. Large-scale vortical structures produced by an impinging density jet in shallow crossflow[J]. Applied Mathematics and Mechanics(English Edition), 2006, 27(3): 363-369. DOI: 10.1007/s 10483-006-0312-z |
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| Authors: | Jing-yu Fan Dao-zeng Wang Yan Zhang |
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| Affiliation: | 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China
2. SMIT Center, Shanghai University, Shanghai 200072, P R China;Department of Applied Mechanics, Chalmers University of Technology,Gothenburg SE 412-96, Sweden |
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| Abstract: | The large-scale vortical structures produced by an impinging density jet in shallow crossflow were numerically investigated in detail using RNG turbulence model. The scales, formation mechanism and evolution feature of the upstream wall vortex in relation to stagnation point and the Scarf vortex in near field were analyzed. The computed characteristic scales of the upstream vortex show distinguished three-dimensionality and vary with the velocity ratio and the water depth. The Scarf vortex in the near field plays an important role in the lateral concentration distributions of the impinging jet in crossflow. When the velocity ratio is relatively small, there exists a distinct lateral high concentration aggregation zone at the lateral edge between the bottom layer wall jet and the ambient crossflow, which is dominated by the Scarf vortex in the near field. |
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| Keywords: | impinging jet crossflow large-scale vortical structure concentration distribution |
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