狭缝宽度对分离式柱肋冷却通道内传热与流动影响的数值计算

上海交通大学学报（自然版） ›› 2014, Vol. 48 ›› Issue (06): 756-760.

狭缝宽度对分离式柱肋冷却通道内传热与流动影响的数值计算

李麟，饶宇，万超一

（上海交通大学机械与动力工程学院，上海 200240）

收稿日期:2013-06-15 出版日期:2014-06-30 发布日期:2014-06-30
基金资助:
国家自然科学基金（51176111, 81027001）资助项目

A Numerical Study of Thermal Performance and Pressure Loss in a Cooling Channel with Detached Pin Fins

LI Lin,RAO Yu,WAN Chaoyi

（School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China）

Received:2013-06-15 Online:2014-06-30 Published:2014-06-30

摘要/Abstract

摘要：

在雷诺数为8 200~52 500内分别针对宽度为1.0,1.5,2.0,2.5 mm的分离式柱肋冷却通道和同类型的柱肋冷却通道进行了传热特性和流动性能的三维稳态数值计算研究.数值计算采用结合加强壁面处理的realizable k-ε模型.将计算结果进行网格独立性验证和实验验证以保证数值计算的准确性.在所研究的Re数范围内着重分析了分离式柱肋中间狭缝宽度对冷却通道内流场和局部换热特性的影响.数值计算结果表明：分离式柱肋狭缝宽度对冷却效果有很大的影响，在研究的Re数范围内，分离式柱肋存在一个最优宽度，使得冷却效果最佳.

关键词: 分离式柱肋, 涡轮叶片冷却, 狭缝宽度, 传热流动

Abstract:

This paper investigated the influence of the width of detached space on the thermal performance and flow resistance in a cooling channel over the Reynolds number range from 8 200 to 52 500. The threedimensional steadystate simulation was conducted to investigate heat transfer and pressure loss characteristics of detached pin fin arrays with different widths in cooling channels. The numerical results are tested by three grid strategies, and the numerical method was validated by experimental data. Numerical results show that in the researched Re number range, the width of detached pin fin has a great influence on the cooling ability while the width of the detached pin fin has an optimal value to make the best cooling performance.

Key words： detached pin fin; turbine blade cooling; width of pin fin; flow and heat transfer

中图分类号:

李麟，饶宇，万超一. 狭缝宽度对分离式柱肋冷却通道内传热与流动影响的数值计算[J]. 上海交通大学学报（自然版）, 2014, 48(06): 756-760.

LI Lin,RAO Yu,WAN Chaoyi. A Numerical Study of Thermal Performance and Pressure Loss in a Cooling Channel with Detached Pin Fins[J]. Journal of Shanghai Jiaotong University, 2014, 48(06): 756-760.

参考文献

［1］曹玉章,陶智,徐国强,等.航空发动机传热学［M］.北京:北京航空航天大学出社,2005:186198.

［2］Metzger D E, Berry R A, Bronson J P. Developing heat transfer in rectangular ducts with staggered arrays of short pin fins［J］. Journal of Heat Transfer, 1982, 104(4): 700706.

［3］Ligrani P M, Oliveira M M, Blaskovich T. Comparison of heat transfer augmentation techniques［J］. AIAA Journal, 2003, 41(3): 337362.

［4］Indi A, Prabhu S V, Vedula R P. Local heat transfer distribution in a rectangular pin channel with and without vortex generators［J］. Experimental Heat Transfer, 2011, 24(1): 3458.

［5］Lawson S A, Thrift A A, Thole K A, et al. Heat transfer from multiple row arrays of low aspect ratio pin fins［J］. International Journal of Heat and Mass Transfer, 2011, 54(17): 40994109.

［6］Lyall M E, Thole K A, Kohli A, et al. Heat transfer from low aspect ratio pin fins［J］. Journal of Turbomachinery, 2011, 133(1): 011001.

［7］Wang F, Zhang J, Wang S. Investigation on flow and heat transfer characteristics in rectangular channel with dropshaped pin fins［J］. Propulsion and Power Research, 2012, 1(1): 6470.

［8］Siw S C, Shih T I P, Alvin M A, et al. Effects of pin detached space on heat transfer and pinfin arrays［J］. Journal of Heat Transfer, 2012, 134(8): 081902.

［9］Sahin B, Demir A. Thermal performance analysis and optimum design parameters of heat exchanger having perforated pin fins［J］. Energy Conversion and Management, 2008, 49(6): 16841695.

［10］Chang S W, Yang T L, Huang C C, et al. Endwall heat transfer and pressure drop in rectangular channels with attached and detached circular pinfin array［J］. International Journal of Heat and Mass Transfer, 2008, 51(21): 52475259.

［11］Gee D L, Webb R L. Forced convection heat transfer in helically ribroughened tubes［J］. International Journal of Heat and Mass Transfer, 1980, 23(8): 11271136.

［12］Kays W M, Crawford M E, Weigand B. Convective Heat and Mass Transfer［M］.

New York: McGrawHill Inc, 2004.

［13］Rao Y, Wan C, Xu Y, et al. Spatiallyresolved heat transfer characteristics in channels with pin fin and pin findimple arrays［J］. International Journal of Thermal Sciences, 2011, 50(11): 22772289.