Heat transfer of multi-slot nozzles air jet impingement with different Reynolds number
Heat transfer of multi-slot nozzles air jet impingement with different Reynolds number
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DOI：
10.1016/j.applthermaleng.2020.116470
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发表时间：
2021-03
影响因子：
6.4
通讯作者：
Jinqi Zhu;Ruifeng Dou;Ye-rong Hu;S. Zhang;Xu-ying Wang
中科院分区：
文献类型：
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作者：
Jinqi Zhu;Ruifeng Dou;Ye-rong Hu;S. Zhang;Xu-ying Wang
本文分析了多缝喷嘴空气射流在相邻射流之间存在速度差时的换热特性。研究内容包括相邻射流的存在对换热均匀性的影响和对换热能力的影响。在特定条件下进行了多缝喷管实验。与单喷嘴射流换热相比，多喷嘴射流换热的均匀性得到了改善。而且，相邻射流的雷诺数越接近，换热均匀性越好。相邻射流的存在会相对抑制传热能力。通过单槽喷嘴实验，得到了实验平台上单槽喷嘴射流换热特性的经验公式。通过对单缝喷管经验公式的推广，得到了多缝喷管的经验公式。通过多喷嘴验证性实验，验证了多槽喷嘴经验公式的准确性，拓宽了经验公式的适用范围。
This study analyzes the heat transfer characteristics of multi-slot nozzles air jets with velocity difference between the adjacent jets. The research content includes the influence of thermal uniformity analysis and heat transfer capacity owing to the existence of adjacent jets. The multi-slot nozzles experiment was carried out under the specified conditions. The heat transfer uniformity of multi-slot nozzles jet heat transfer was improved compared with that of a single-nozzle jet heat transfer. Moreover, the closer the Reynolds number of the adjacent jets, the better the heat transfer uniformity. The existence of adjacent jets would relatively inhibit the heat transfer capacity. Through a single-slot nozzle experiment, an empirical formula for heat transfer characteristics of a single-nozzle jet on this experimental platform is obtained. The empirical formula of multi-slot nozzles is obtained by extending the empirical formula of single nozzle. The accuracy of multi-slot nozzles empirical formula is verified through a multi-nozzle confirmatory experiment, and the application scope of the empirical formula is relatively widened.