| Transient heat transfer characteristics of air-array-jet impingement with different nozzle arrangements on high-tempera-ture flat plate in small jet-to-plate distance |
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| 作者姓名： | LI Meixiang ZHU Keqian XIE Yu CAI Tingting YUAN Ningyi DING Jianning |
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| 作者单位： | 1. School of Mechanical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China; 2. Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Changzhou, Jiangsu 213164, China; 3. Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou, Jiangsu 213164, China; 4. School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China. |
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| 基金项目： | Natural Science Foundation of China(51335002,51905049)。 |
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| 摘 要： | Numerical studies on transient heat transfer characteristics of air-array-jet impingement with a small jet-to-plate distance and a large temperature difference between nozzles and plate were presented.The dimensionless jet-to-plate distance(H/D)was 0.2,and non-dimensional nozzle-to-nozzle spacing(S/D)was 3,4,5 and 6,respectively.It is found that the quenching time is shortened at a constant total mass flow at air jet inlet m·(m·=218.21 kg/h),and the heat transfer uniformity is deterio-rated as S/D increases.However,the adding reversed-flow nozzles can shorten the quenching time of the glass plate considerably with a modest change in the heat transfer uniformity.The results at variable m·are the same as those at a fixed m·.Furthermore,the parity and arrangement of nozzles are also discussed,It is found that an odd number of nozzles is more beneficial for transient heat transfer.Based on these results,an appropriate proposal for ultra-thin glass tempering process is presented.
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| 关 键 词： | glass TEMPERING low jet-to-plate distances ARRAY JET IMPINGEMENT nozzles arrangement transient heat transfer |
| 收稿时间： | 2019-04-10 |
Transient heat transfer characteristics of air-array-jet impingement with different nozzle arrangements on high-temperature flat plate in small jet-to-plate distance |
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| LI Meixiang,ZHU Keqian,XIE Yu,CAI Tingting,YUAN Ningyi,DING Jianning.Transient heat transfer characteristics of air-array-jet impingement with different nozzle arrangements on high-tempera-ture flat plate in small jet-to-plate distance[J].Journal of Drainage and Irrigation Machinery Engineering,2020,38(3):277-284. |
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| Authors: | LI Meixiang ZHU Keqian XIE Yu CAI Tingting YUAN Ningyi DING Jianning |
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| Institution: | School of Mechanical Engineering,Changzhou University,Changzhou,Jiangsu 213164,China;Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering,Changzhou,Jiangsu 213164,China;Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology,Changzhou,Jiangsu 213164,China;School of Mechanical Engineering,Changzhou University,Changzhou,Jiangsu 213164,China;School of Mechanical Engineering,Changzhou University,Changzhou,Jiangsu 213164,China;Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering,Changzhou,Jiangsu 213164,China;Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology,Changzhou,Jiangsu 213164,China;School of Mechanical Engineering, Jiangsu University,Zhenjiang,Jiangsu 212 |
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| Abstract: | Numerical studies on transient heat transfer characteristics of air-array-jet impingement with a small jet-to-plate distance and a large temperature difference between nozzles and plate were presented. The dimensionless jet-to-plate distance( H/D) was 0. 2,and non-dimensional nozzle-to-nozzle spacing( S/D) was 3,4,5 and 6,respectively. It is found that the quenching time is shortened at a constant total mass flow at air jet inlet ■( ■= 218.21 kg/h),and the heat transfer uniformity is deteriorated as S/D increases. However,the adding reversed-flow nozzles can shorten the quenching time of the glass plate considerably with a modest change in the heat transfer uniformity. The results at variable ■ are the same as those at a fixed ■. Furthermore,the parity and arrangement of nozzles are also discussed,It is found that an odd number of nozzles is more beneficial for transient heat transfer. Based on these results,an appropriate proposal for ultra-thin glass tempering process is presented. |
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| Keywords: | glass tempering low jet-to-plate distances array jet impingement nozzles arrangement transient heat transfer |
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