| 轴向通流旋转盘腔内换热的数值模拟 |
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| 引用本文： | 田淑青,陶智,丁水汀,徐国强.轴向通流旋转盘腔内换热的数值模拟[J].航空动力学报,2005,20(4):656-661. |
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| 作者姓名： | 田淑青 陶智 丁水汀 徐国强 |
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| 作者单位： | 北京航空航天大学,航空发动机气动热力重点实验室,北京,100083 |
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| 摘 要： | 以数值模拟的方法,采用旋转坐标系稳态方程,研究了轴向通流旋转盘腔内的换热。主要讨论了流动对换热的作用以及旋转系下各力对换热的影响,给出了盘腔内的换热随各无量纲参数的变化规律。研究结果表明:哥氏力的增大削弱了轴向通流旋转盘腔内的换热,惯性力和浮升力的增大增强了换热;反映在无量纲参数上,随着进口雷诺数的提高,盘腔内的换热增强;随着瑞利数的提高(提高转速),盘腔内的换热经历一个缓慢变化-突增-缓慢变化的过程,换热的突然增强是冷气流穿透盘腔所致。
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| 关 键 词： | 航空、航天推进系统 数值计算 传热 旋转 浮力 哥氏力 |
| 文章编号： | 1000-8055(2005)04-0656-06 |
| 收稿时间： | 6/7/2004 12:00:00 AM |
| 修稿时间： | 2004年6月7日 |
Numerical Investigation on Heat Transfer in a Rotating Cavity with Axial Throughflow Cooling Air |
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| TIAN Shu-qing,TAO Zhi,DING Shui-ting and XU Guo-qiang.Numerical Investigation on Heat Transfer in a Rotating Cavity with Axial Throughflow Cooling Air[J].Journal of Aerospace Power,2005,20(4):656-661. |
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| Authors: | TIAN Shu-qing TAO Zhi DING Shui-ting and XU Guo-qiang |
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| Institution: | National Key Laboratory of Aircraft Engine, Beijing University of Aeronautics and Astronautics,Beijing100083,China;National Key Laboratory of Aircraft Engine, Beijing University of Aeronautics and Astronautics,Beijing100083,China;National Key Laboratory of Aircraft Engine, Beijing University of Aeronautics and Astronautics,Beijing100083,China;National Key Laboratory of Aircraft Engine, Beijing University of Aeronautics and Astronautics,Beijing100083,China |
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| Abstract: | To investigate the heat transfer in heated rotating cavities with axial throughflow cooling air,numerical simulations have been carried out based on the time-independent incompressible equations in rotating system.The effects of unstable flow and various forces on heat transfer were studied,and the heat transfer coefficient variations with Reynolds number and Rayleigh number were calculated.The results show that the heat transfer in a rotating cavity with axial throughflow cooling air is enhanced with the increase of the inertia force and buoyancy force,and is weakened with the increase of the Coriolis force.The heat transfer coefficient rises with Reynolds number,and varies slightly with the increase of Rayleigh number.The sudden enhancement of heat transfer is caused by the penetration of cooling air through the disc cavity. |
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| Keywords: | aerospace propulsion system numerical computation heat transfer rotating cavity buoyancy force Coriolis force |
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