CFD study of turbulent jet impingement on curved surface

doi:10.1016/j.cjche.2015.12.009

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 Taghinia^1,2, Md Mizanur Rahman¹, Timo Siikonen¹

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 Taghinia^1,2, Md Mizanur Rahman¹, Timo Siikonen¹

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/Abstract

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 (U_e) 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 (U_e) 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

Javad Taghinia, Md Mizanur Rahman, Timo Siikonen. CFD study of turbulent jet impingement on curved surface[J]. Chinese Journal of Chemical Engineering, 2016, 24(5): 588-596.

Javad Taghinia, Md Mizanur Rahman, Timo Siikonen. CFD study of turbulent jet impingement on curved surface[J]. Chin.J.Chem.Eng., 2016, 24(5): 588-596.

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CFD study of turbulent jet impingement on curved surface

CFD study of turbulent jet impingement on curved surface

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