竹节形扰流元对流动与换热特性影响的数值研究

黄国联; 王锁芳

竹节形扰流元对流动与换热特性影响的数值研究

南京航空航天大学高新技术研究院, 南京 210016

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出版历程
- 收稿日期: 2006-07-17
- 修回日期: 2006-11-21
- 刊出日期: 2007-08-28

A numerical study on the effects of bamboo-shaped pin fin arrays on flow and heat transfer

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 采用数值计算方法, 研究了扰流柱形状对通道中流体流动和换热的影响, 模拟了带竹节形扰流柱通道的流场.结果表明:相对于圆柱形扰流柱, 装有圆柱竹节形和椭圆竹节形扰流柱阵列矩形通道的压力损失系数分别为62%～77%和25%～27%, 而恒热流壁面的平均奴塞尔数分别降低了9%²2%和22%²4%.随着扰流柱排列间距的减小, 压力损失增加, 而改变扰流柱排列横向间距引起的压力损失的变化要比改变流向间距显著.
- 航空、航天推进系统 /
- 竹节形扰流柱 /
- 对流换热 /
- 压力损失 /
- 数值计算
Abstract: The effects of pin fins on the flow and heat transfer of passage was studied via numerical calculation method, and the flow field of bamboo-shaped columns was simulated.The calculated results show that, as compared with circle-shaped columns, the pressure loss of rectangular passage with circle bamboo-shaped and elliptic bamboo-shaped columns is 62%～77% and 25%～27%, and the average Nusselt number on the uniform heat flux end wall decreases to 9%～22% and 22%～24%.The pressure loss increases with the reduction of spacing between pin fins, and the variation of the pressure loss induced by changing spanwise pin fins spacing is more obvious than by changing streamwise pin fins spacing.
- aerospace propulsion system /
- bamboo-shaped pin fin /
- forced convective heat transfer /
- pressure loss /
- numerical calculation

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参考文献(9)

[1]	Sparrow E M,Grannis V B.Pressure drop characteristics of heat exchangers consisting of arrays of diamond-shaped pin fins[J].International Journal of Heat and Mass Transfer,1991,34(3):589-600.
[2]	Grannis V B,Sparrow E M.Numerical simulation of fluid flow through an array of diamond-shaped pin fin[J].Numerical Heat Transfer,1991,19 (3):381-403.
[3]	Uzol Q,Camci C.Elliptical pin fins as an alternative to circular pin fins for gas turbine blade cooling applications Part 1:Endwall heat transfer and total pressure loss characteristics[R].ASME Paper 2001-GT-0180,2001.
[4]	Q Li,Heat transfer and pressure drop characteristics in rectangular channels with elliptic pin fins[J].International Journal of Heat and Fluid Flow,1998,19(3):245-250.
[5]	Chen Z,Li Q,Meierand D,et al.Convective heat transfer and pressure loss in rectangular ducts with drop-shaped pin fins[J].Heat and Mass transfer,1997,33 (2):219-224.
[6]	韩占忠,王敬,兰小平.FLUENT流体工程仿真计算实测与应用[M].北京:北京理工大学出版社,2004.
[7]	陶文铨.数值传热学[M].2版.西安:西安交通大学出版社,2002.TAO Wenshuan.Numerical Heat Transfer[M].sec ed..Xi'an:Xi'an Jiaotong University press,2002.
[8]	苏红桢,刘松龄.扰流柱排内部流场的实验研究.航空动力学报[J].1997,12(2):175-179.SU Hongzhen,LIU Songling.Expermental study on pin-fin array flow field[J].Journal of Aerospace Power,1997,12(2):175-179.
[9]	朱惠人,许都纯.不同直径及形状的短扰流柱群的流阻及换热[J].航空动力学报,2002,17(2):246-249.ZHU Huiren,XU Duchun.Heat transfer and pres-sure drop of short pin-fin array with different diameter and shape[J].Journal of Aerospace Power 2002,17(2):246-249.