Mixed convection cooling of a cylinder using slot jet impingement at different circumferential angles

被引：7

作者：

Naderipour, S. ^{[1
]}

Yousefi, T. ^{[2
,4
]}

Ashjaee, M. ^{[3
]}

Naylor, D. ^{[4
]}

机构：

[1] Univ Shahid Bahonar, Dept Mech Engn, Kerman, Iran

[2] Univ Razi, Dept Mech Engn, Kermanshah, Iran

[3] Univ Tehran, Dept Mech Engn, Tehran, Iran

[4] Ryerson Univ, Dept Mech & Ind Engn, Toronto, ON, Canada

来源：

HEAT AND MASS TRANSFER | 2016年 / 52卷 / 08期

关键词：

HEAT-TRANSFER; CIRCULAR-CYLINDER; AIR; SURFACES;

D O I：

10.1007/s00231-015-1665-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental study using Mach-Zehnder interferometer has been carried out to investigate the heat transfer from an isothermal horizontal circular cylinder, which is exposed to an air slot jet at different angles of jet impingement. A square edged nozzle is mounted parallel with the cylinder axis and jet flow impinges on the side of the cylinder at angles I similar to = 0A degrees, 30A degrees, 60A degrees and 90A degrees. The Reynolds number varied from 240 to 1900 while the Grashof number and slot- to cylinder-spacing is kept constant at Gr = 22,300 and H/w = 7 respectively. The Richardson number varied from 0.006 to 0.4. The flow field is greatly influenced by the slot exit velocity and the buoyancy force due to density change. The local Nusselt number around the cylinder has been calculated using the infinite fringe interferograms at 10A degrees intervals. Average Nusselt number shows that heat transfer is decreased when the angle of jet impingement is increased .

引用

页码：1443 / 1453

页数：11

共 20 条

[1] Mixed convection cooling of a heated circular cylinder by laminar upward-directed slot jet impingement [J].