| 数值模拟圆柱绕流旋涡运动及尾流不稳定性分析 |
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| 引用本文： | 叶春明,吴文权. 数值模拟圆柱绕流旋涡运动及尾流不稳定性分析[J]. 工程热物理学报, 1997, 0(2) |
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| 作者姓名： | 叶春明 吴文权 |
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| 作者单位： | 上海理工大学动力工程学院!上海，200093，上海理工大学动力工程学院!上海，200093 |
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| 摘 要： | 1引言流体绕过圆柱所产生的非定常旋涡运动以及由此引起的流动不稳定性在理论和实践上都具有重要的意义。数值模拟圆柱绕流旋涡产生及演化过程，探讨圆柱尾流涡街产生的机制，控制尾迹不同速度型以抑制涡街的产生，避免涡激振动在工程上造成破坏作用具有重大实际意义。为使问题简化，本文以二维圆柱绕流作为研究对象。该流动涉及到非定常分离，旋涡的形成、运动及发展，流动不稳定性质改变等许多未完全解决的问题。B。had等山对圆柱突然起动问题作了一系列实验研究。文献门对二维圆柱绕流问题作了系统数值研究。本文采用文献门提出的差分格…
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| 关 键 词： | 圆柱绕流 旋涡运动 不稳定性 |
NUMERICAL SIMULATION OF VOTEX MOVEMENT FOR THE FLOW PAST A CIRCULAR CYLINDER AND THE ANALYSIS OF WAKE INSTABLITY |
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| YE Chunming, WU Wenquan. NUMERICAL SIMULATION OF VOTEX MOVEMENT FOR THE FLOW PAST A CIRCULAR CYLINDER AND THE ANALYSIS OF WAKE INSTABLITY[J]. Journal of Engineering Thermophysics, 1997, 0(2) |
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| Authors: | YE Chunming WU Wenquan |
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| Abstract: | The N-S equation in the voticity-stream function form was solved numerically withfinite difference method for flow past two- dimensional cylinder. The generation of symmetricvortex and secondary votex and the evolution of Karman vortex street with time progressare numerica1ly simulated in detail. Different velocity types of wake flow are also calculatedand their linear stablity properties are analyzed. Somemethods of controlling wake flow inengineering are introduced according to the theory of absolutely and convectively instablity. |
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| Keywords: | flow past a circular cylinder vortex movement instablity |
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