Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (3): 47-52.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Numerical Simulation of Heat-Transfer Characteristics of Swirling Impinging Jet with Micro-Aperture

Wang Chang-hong1  Zhu Dong-sheng1  Tu Juan2  Wang Nan1   

  1. 1.Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Guangdong Electric Power Design Institute, Guangzhou 510600, Guangdong, China
  • Received:2008-01-16 Revised:2008-05-19 Online:2009-03-25 Published:2009-03-25
  • Contact: 朱冬生（1964-），男，教授，博士生导师，主要从事纳米能源与节能新技术的研究．E—mail：cedszhu@scut．edu．cn E-mail:wang．chh@mail．scut．edu．cn
  • About author:王长宏（1980-），男，博士生，主要从事电子封装热管理及新型制冷技术的研究．
  • Supported by:

    国家自然科学基金资助项目（50376076）;教育部新世纪人才支持计划项目（NCE040826）

PDF

1048

Abstract:

In this paper, the heat transfer of swirling impinging jet is numerically simulated, and the effects of injection aperture, injection distance, swirling angular velocity and flow-field distribution characteristics on the surface heat-transfer coefficient and the average heat-transfer effect are analyzed. The results indicate that, with the same Reynolds number, the average heat-transfer effect of the jet from 3 mm-diameter nozzle is better than that from the 6 mm-diameter one, that the average heat-transfer coefficient of the jet form big-diameter nozzle is more greatly affected by the swirling angular velocity, that the maximum heat-transfer coefficient decreases as the swirling angu- lar velocity increases, with the peak value moving away from the stagnation point, and that the curve of average heat-transfer coefficient becomes more fiat as the swirling angular velocity increases, meaning that the swirling resuits in uniform heat transfer.

Key words: swirling impinging jet, numerical simulation, surface heat-transfer coefficient, heat-transfer characteristic