ISSN Online: 2377-424X
International Heat Transfer Conference 12
Turbulent heat transfer in a crossflow cavity with inclined sidewalls
要約
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.