| 旋转射流冲击凸台换热特性的数值模拟 |
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| 引用本文： | 张志强,周静伟,洪飞飞.旋转射流冲击凸台换热特性的数值模拟[J].中国计量学院学报,2012,23(1):13-19. |
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| 作者姓名： | 张志强 周静伟 洪飞飞 |
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| 作者单位： | 中国计量学院计量测试工程学院,浙江杭州,310018 |
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| 摘 要： | 运用重整化(RNG)的κ-ε模型对半封闭板内带旋流的射流冲击凸台的传热及流动进行仿真,研究了旋转射流冲击凸台时的流场特性以及凸台表面、侧壁和平板上的传热特性.分析了旋流强度(旋转数)、流动Re数、冲击高度H/D对传热与流动的影响.结果表明,不同Re数下旋流会削弱驻点处的冲击作用,从而使得驻点处的传热Nu数减小.在雷诺数Re=25 000时,在旋转数0
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| 关 键 词： | 旋转射流 凸台 重整化的κ-ε模型 传热特性 |
Numerical simulation on heat transfer of a rotating jet impinging on a protruding pedestal |
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| ZHANG Zhi-qiang
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ZHOU Jing-wei
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HONG Fei-fei.Numerical simulation on heat transfer of a rotating jet impinging on a protruding pedestal[J].Journal of China Jiliang University,2012,23(1):13-19. |
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| Authors: | ZHANG Zhi-qiang ZHOU Jing-wei HONG Fei-fei |
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| Affiliation: | (College of Metrology and Measurement Engineering,China Jiliang University,Hangzhou 310018,China) |
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| Abstract: | The RNG κ-ε model was used to compute the heat transfer and rotational flow field of a semi-confined turbulent axisymmetric jet,impinging onto a pedestal mounted on a flat plate.Heat transfer and rotational flow field characteristics were investigated on the pedestal top surface and side face,as well as on the plate.The influence of rotational flow intensity(rotation number R),Reynolds number Re and nozzle-to-pedestal distance H/D on heat transfer and flow was studied.It showed that impinging on the stagnation point was weakened by the rotating jet under different Reynolds number,and the Nusselt number on the stagnation point decreased.The combination of Re=25 000 and rotation number 0
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| Keywords: | rotating jet pedestal RNG κ-ε model heat transfer characteristics |
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