| Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct | |
Li X(李冼)1,2 ; Du MM(杜蒙蒙)1,2; Zhong FQ(仲峰泉)1,2
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| Corresponding Author | Zhong, Fengquan([email protected]) |
| Source Publication | ACTA MECHANICA SINICA
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| 2022-06-01 | |
| Volume | 38Issue:6Pages:12 |
| ISSN | 0567-7718 |
| Abstract | 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. |
| Keyword | Dimple depth Kerosene Convective heat transfer Turbulent flow |
| DOI | 10.1007/s10409-021-09010-x |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000811214000006 |
| WOS Keyword | TRANSFER ENHANCEMENT ; HYDROCARBON FUEL ; COOLING CHANNELS ; REYNOLDS-NUMBER ; FRICTION ; SURFACES ; METHANE |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Project | National Natural Science Foundation of China[11672307] ; National Science and Technology Major Project[2017-III-0005-0029] |
| Funding Organization | National Natural Science Foundation of China ; National Science and Technology Major Project |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Zhong, Fengquan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89658 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Li X,Du MM,Zhong FQ. Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct[J]. ACTA MECHANICA SINICA,2022,38,6,:12.Rp_Au:Zhong, Fengquan |
| APA | 李冼,杜蒙蒙,&仲峰泉.(2022).Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct.ACTA MECHANICA SINICA,38(6),12. |
| MLA | 李冼,et al."Effect of dimple depth on turbulent flow and heat transfer of kerosene in rectangular duct".ACTA MECHANICA SINICA 38.6(2022):12. |
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| Jp2022FA348_2022_Eff（4562KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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