ENHANCED HEAT TRANSFER UNDER VECTORED ANNULAR JET

被引：11

作者：

Pal, Tarun Kanti ^{[1
]}

Chattopadhyay, Himadri ^{[2
]}

Mandal, Dipak Kumar ^{[1
]}

机构：

[1] Coll Engn & Management, Dept Mech Engn, Kolaghat 721171, India

[2] Jadavpur Univ, Dept Mech Engn, Kolkata 700032, India

来源：

HEAT TRANSFER RESEARCH | 2021年 / 52卷 / 03期

关键词：

enhancement; annular jet; impingement; vectored jets; angled exit; TO-TURBULENT TRANSITION; MOVING SURFACE; NUMERICAL INVESTIGATIONS; FLOW; LAMINAR; IMPINGEMENT; SIMULATION;

D O I：

10.1615/HeatTransRes.2021036515

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This work concerns transport enhancement of impinging annular jets. The possibility of heat transfer enhancement on an impinging surface under annular nozzle using angled exit jet is introduced in this work. After initial studies at three levels of angles for jet exit, in the final configuration, the jet was assumed to emanate at an inclination of 60 degrees with the axis. The angled jet exit is found to bring in enhancement of heat transfer. The results for angled annular jet are benchmarked against annular as well as circular jet. The transition-SST (shear-stress transport) model is used for solving the problem, while the Reynolds numbers of jet varies from 100 to 50,000. The location of peak value for angled jet shifts further downstream compared to standard axial jet. The study reveals that heat transfer enhances by 20-30% in the case of angled exit of annular jet than that due to orthogonally impinging annular jet. Heat transfer from vectored annular jet is found to be higher even than that due to circular jet having the same mass and momentum efflux.

引用

页码：15 / 28

页数：14

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