This paper numerically and experimentally investigated the effect of weak crossflow on the heat transfer characteristics of a short-distance impinging jet. The Reynolds number of the impinging jet ranged from 6000 to 15,000, and the mass velocity ratio (M) between the crossflow and the jet varied from 0 to 0.15. The separation distance (H) between the exit of the jet nozzle and the impingement surface equals to the exit diameter (D) of the impinging jet. In the experiments, the temperature distribution on the impingement target surface was measured using a transient liquid crystal method. In the numerical simulation, a multiblock hexahedral mesh was applied to discrete the computational domain, and a commercial CFD package (Ansys cfx-12.0) with a standard turbulence model was used for computation. It was found that compared to the impinging cooling without crossflow, the heat transfer characteristics near the impinging stagnation point remained almost constant. At the same time, the presence of crossflow decreased the heat transfer rate in the upstream region of the impinging stagnation point, while increased that in the downstream of the impinging stagnation point. Taken together, crossflow has a complex influence on the impinging cooling, which is highly dependent on the mass velocity ratio between the crossflow and the jet.
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November 2014
This article was originally published in
Journal of Heat Transfer
Research-Article
The Effect of Weak Crossflow on the Heat Transfer Characteristics of Short-Distance Impinging Cooling
Chuanjie Zhang,
Chuanjie Zhang
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
e-mail: Zhangcj0123@163.com
and Technology on Aero-Engine
Aero-Thermodynamics,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: Zhangcj0123@163.com
Search for other works by this author on:
Guoqiang Xu,
Guoqiang Xu
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
e-mail: guoqiang_xu@buaa.edu.cn
and Technology on Aero-Engine
Aero-Thermodynamics,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: guoqiang_xu@buaa.edu.cn
Search for other works by this author on:
Haiwang Li,
Haiwang Li
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
e-mail: 19820912@sina.com
and Technology on Aero-Engine
Aero-Thermodynamics,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: 19820912@sina.com
Search for other works by this author on:
Jining Sun,
Jining Sun
1
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
School of Energy and Power Engineering,
e-mail: Sunjining@buaa.edu.cn
and Technology on Aero-Engine
Aero-Thermodynamics,
School of Energy and Power Engineering,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: Sunjining@buaa.edu.cn
1Corresponding author.
Search for other works by this author on:
Na Cai
e-mail: caina0532@126.com
Na Cai
Naval Aeronautical Engineering Academy
,Qingdao Branch
,Qingdao 266041
, China
e-mail: caina0532@126.com
Search for other works by this author on:
Chuanjie Zhang
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
e-mail: Zhangcj0123@163.com
and Technology on Aero-Engine
Aero-Thermodynamics,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: Zhangcj0123@163.com
Guoqiang Xu
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
e-mail: guoqiang_xu@buaa.edu.cn
and Technology on Aero-Engine
Aero-Thermodynamics,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: guoqiang_xu@buaa.edu.cn
Haiwang Li
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
e-mail: 19820912@sina.com
and Technology on Aero-Engine
Aero-Thermodynamics,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: 19820912@sina.com
Jining Sun
National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
School of Energy and Power Engineering,
e-mail: Sunjining@buaa.edu.cn
and Technology on Aero-Engine
Aero-Thermodynamics,
School of Energy and Power Engineering,
Beihang University
,37# Xueyuan Road
,Haidian District
,Beijing 100191
, China
e-mail: Sunjining@buaa.edu.cn
Na Cai
Naval Aeronautical Engineering Academy
,Qingdao Branch
,Qingdao 266041
, China
e-mail: caina0532@126.com
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received October 17, 2013; final manuscript received July 14, 2014; published online August 18, 2014. Assoc. Editor: Danesh / D. K. Tafti.
J. Heat Transfer. Nov 2014, 136(11): 112201 (11 pages)
Published Online: August 18, 2014
Article history
Received:
October 17, 2013
Revision Received:
July 14, 2014
Citation
Zhang, C., Xu, G., Li, H., Sun, J., and Cai, N. (August 18, 2014). "The Effect of Weak Crossflow on the Heat Transfer Characteristics of Short-Distance Impinging Cooling." ASME. J. Heat Transfer. November 2014; 136(11): 112201. https://doi.org/10.1115/1.4028081
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