SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (5): 588-596.DOI: 10.1016/j.cjche.2015.12.009

• 第25届中国过程控制会议专栏 • 上一篇    下一篇

CFD study of turbulent jet impingement on curved surface

Javad Taghinia1,2, Md Mizanur Rahman1, Timo Siikonen1   

  1. 1 Aalto University, School of Engineering, Department of Applied Mechanics, FI-00076, Finland;
    2 Hong Kong University of Science and Technology, Department of Civil and Environmental Engineering, ClearWater Bay, Hong Kong, China
  • 收稿日期:2015-02-27 修回日期:2015-06-26 出版日期:2016-05-28 发布日期:2016-06-14
  • 通讯作者: Javad Taghinia

CFD study of turbulent jet impingement on curved surface

Javad Taghinia1,2, Md Mizanur Rahman1, Timo Siikonen1   

  1. 1 Aalto University, School of Engineering, Department of Applied Mechanics, FI-00076, Finland;
    2 Hong Kong University of Science and Technology, Department of Civil and Environmental Engineering, ClearWater Bay, Hong Kong, China
  • Received:2015-02-27 Revised:2015-06-26 Online:2016-05-28 Published:2016-06-14
  • Contact: Javad Taghinia

摘要: The heat transfer and flow characteristics of air jet impingement on a curved surface are investigated with computational fluid dynamics (CFD) approach. The first applied model is a one-equation SGS model for large eddy simulation (LES) and the second one is the SST-SAS hybrid RANS-LES. These models are utilized to study the flow physics in impinging process on a curved surface for different jet-to-surface (h/B) distances at two Reynolds numbers namely, 2960 and 4740 based on the jet exit velocity (Ue) and the hydraulic diameter (2B). The predictions are compared with the experimental data in the literature and also the results from RANS k-ε model. Comparisons show that both models can produce relatively good results. However, one-equation model (OEM) produced more accurate results especially at impingement region at lower jet-to-surface distances. In terms of heat transfer, the OEM also predicted better at different jet-to-surface spacings. It is also observed that both models show similar performance at higher h/B ratios.

关键词: Jet impingement, Curved surface, RAST one-equation model, Large eddy simulation, Heat transfer

Abstract: The heat transfer and flow characteristics of air jet impingement on a curved surface are investigated with computational fluid dynamics (CFD) approach. The first applied model is a one-equation SGS model for large eddy simulation (LES) and the second one is the SST-SAS hybrid RANS-LES. These models are utilized to study the flow physics in impinging process on a curved surface for different jet-to-surface (h/B) distances at two Reynolds numbers namely, 2960 and 4740 based on the jet exit velocity (Ue) and the hydraulic diameter (2B). The predictions are compared with the experimental data in the literature and also the results from RANS k-ε model. Comparisons show that both models can produce relatively good results. However, one-equation model (OEM) produced more accurate results especially at impingement region at lower jet-to-surface distances. In terms of heat transfer, the OEM also predicted better at different jet-to-surface spacings. It is also observed that both models show similar performance at higher h/B ratios.

Key words: Jet impingement, Curved surface, RAST one-equation model, Large eddy simulation, Heat transfer