图书馆订购 Guest

ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Turbulent heat transfer in a crossflow cavity with inclined sidewalls

Get access (open in a dialog) DOI: 10.1615/IHTC12.1390
5 pages

摘要

In the present work, results of an experimental study of a turbulent flow over a crossflow cavity are reported. The inclination angles of cavity sidewalls φ varied in the range from 30° to 90°. The evolution of the flow has been traced in visualized flow patterns obtained by the oil-film and termography techniques. It is shown that, as the inclination angle φ increases, the vortex formation structure changes drastically. At an inclination angle of 70°, the main-vortex structure transforms from a single-cell two-dimensional to a double-cell three-dimensional one. The flow at φ=70° is highly unstable, and this instability may be classed to the so-called elliptic type. In this case, the heat-transfer coefficients averaged over the entire cavity surface are increased appreciably.