旋转附加力对方通道内流动与换热的影响机理

刘传凯; 丁水汀; 陶 智

旋转附加力对方通道内流动与换热的影响机理

北京航空航天大学航空发动机气动热力重点实验室, 北京 100191

详细信息

作者简介:
刘传凯(1979-),男,黑龙江桦南人,博士后,lckww@sina.com.

中图分类号: V 235.1
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- 被引次数: 0
出版历程
- 收稿日期: 2008-03-11
- 网络出版日期: 2009-03-31

Effects of rotating induced forces on fluid flow and heat transfer in square channel

National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 在雷诺数为25000,旋转数为0~0.24,温度比为0~0.22的范围内,数值模拟了旋转光滑径向出流通道的内流动与换热分布,分析了哥氏力与离心浮升力对旋转管流的耦合作用机理.计算结果表明,切向哥氏力推动了通道截面内的双涡二次流,径向哥氏力则使得近侧壁流体加速和中心流体减速.离心浮升力对流动与换热的作用效果与哥氏力场的分布密切相关.换热计算结果从定性趋势上吻合公开文献中的实验现象,反映了旋转附加力的基本影响规律.
- 燃气轮机 /
- 冷却叶片 /
- 传热 /
- 数值模拟 /
- 旋转
Abstract: Numerical simulations of turbulent flow and heat transfer in a rotating smooth radial outward flow passage were performed with rotation number from 0 to 0.24, density ratio from 0 to 0.22, and fixed Reynolds number of 25000. Effects of Coriolis force and Centrifugal force were analyzed with the three dimensional simulations and the following conclusions were drawn: the tangential component of Coriolis force induces cross stream secondary flow in the form of two-cell pattern, while the radial component of Coriolis force decelerates and accelerates the center bulk flow and the flow in the vicinity of the side wall, respectively. The influence of buoyancy force on flow and heat transfer shows marked dependency on the intensity of the Coriolis force. The predictions reproduce correct physics and show qualitative agreement with the published experimental observations.
- gas turbines /
- cooling blades /
- heat transfer /
- numerical simulation /
- rotating

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参考文献(1)

[1] Harasgama S P, Morris W D. The influence of rotation on the heat transfer characteristics of circular, triangular, and square-sectioned coolant passage of gas turbine rotor blade[J]. Journal of Turbomachinery, 1988, 110:44-50 [2] Wagner J H, Johnson B V, Hajek T J. Heat transfer in rotating passages with smooth walls and radial outward flow[J]. Journal of Turbomachinery, 1991, 113:42-51 [3] 刘传凯,陶智,丁水汀,等. 3种转角下旋转U形方通道的局部换热[J].北京航空航天大学学报, 2006, 32(3):284-287 Liu Chuankai, Tao Zhi, Ding Shuiting, et al. Local heat transfer in a rotating U-shaped square channel with three channel orientations[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(3):284-287(in Chinese) [4] Bons J P, Kerrebock J L. Complementary veolocity and heat transfer measurements in a rotating cooling passage with smooth walls[J]. Journal of Turbomachinery, 1999, 121:651-661 [5] Liou T M, Hwang Y S, Chen M Y. Characteristics of pressure, flow, and heat transfer in rotating internal cooling passages with attached-detached ribs. ASME 2005-GT-68661, 2005 [6] Dutta S, Andrews M J, Han J C. Prediction of turbulent heat transfer in rotating smooth square ducts[J]. International Journal of Heat and Mass Transfer, 1996, 39(12):2505-2514 [7] Rigby D L, Ameri A A, Steinthorsson E. Internal passage heat transfer prediction using multiblock grids and a k-ω turbulence model. ASME 96-GT-188, 1996 [8] Sleiti A, Kapat J S. Effect of Coriolis and Centrifugal forces at high rotation and density ratios[J]. Journal of Thermophysics and Heat Transfer, 2006, 20(1):67-79 [9] Wilcox D C. Turbulence modeling for CFD[M]. California: DCW Industries Inc, 1993 [10] 刘传凯.旋转蛇形通道内冷气的流动与换热机理研究. 北京:北京航空航天大学能源与动力工程学院,2006 Liu Chuankai. Study on fluid flow and heat transfer in rotating serpentine cooling channels. Beijing:School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, 2006(in Chinese)

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