Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct

doi:10.1007/s10409-021-09010-x

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct
	Li, Xian 1,2; Du, Mengmeng 1,2; Zhong, Fengquan 1,2
刊名	ACTA MECHANICA SINICA
	2022-06-01
卷号	38 期号:6 页码:12
关键词	Dimple depth Kerosene Convective heat transfer Turbulent flow
ISSN号	0567-7718
DOI	10.1007/s10409-021-09010-x
通讯作者	Zhong, Fengquan(fzhong@imech.ac.cn)
英文摘要	In this paper, the coupling effect of dimple depth and fluid properties on convective heat transfer of kerosene flowing in a small-scale rectangular duct with circular dimples is studied numerically. The numerical simulation is based on Reynolds average method with a shear stress transport (SST) k-omega turbulence model and a 10-components surrogate model of kerosene. Turbulent flow and heat transfer properties in different depths of circular dimples are obtained. The results show that the three-dimensional vortices are generated by dimples and the vortices alter local turbulent flowing significantly, leading to both enhanced and reduced convective heat transfer to the wall at different locations. It is also found that the averaged Nusselt number on different dimpled walls first increases in the raising of dimple depths and then decreases after dimple depths reach a certain value. The obtained flow field shows that the heat transfer enhancement on the dimpled wall is caused by vortices with horse-shoe and tornado structures. When dimple depth further increases, the vortical structure changes to asymmetric horn spiral form, which causes heat transfer reduction. Similar to the variation of Nusselt number, the friction factor through dimpled duct also increases firstly with the dimple depth and then decreases.
资助项目	National Natural Science Foundation of China[11672307] ; National Science and Technology Major Project[2017-III-0005-0029]
WOS关键词	TRANSFER ENHANCEMENT ; HYDROCARBON FUEL ; COOLING CHANNELS ; REYNOLDS-NUMBER ; FRICTION ; SURFACES ; METHANE
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000811214000006
资助机构	National Natural Science Foundation of China ; National Science and Technology Major Project
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89657]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Zhong, Fengquan
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Xian,Du, Mengmeng,Zhong, Fengquan. Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct[J]. ACTA MECHANICA SINICA,2022,38(6):12.
APA	Li, Xian,Du, Mengmeng,&Zhong, Fengquan.(2022).Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct.ACTA MECHANICA SINICA,38(6),12.
MLA	Li, Xian,et al."Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct".ACTA MECHANICA SINICA 38.6(2022):12.