Abstract
The time and spatial temperature profiles on the impingement plate were measured by using an infrared radiometer with a two-dimensional array of Indium-Antimony (In Sb) sensors for various nozzle exit-to-plate separations, when the jet being issued from an elliptic nozzle impinges to the target plate. The isotherms of infrared images, as well as the heat transfer coefficients were obtained. The heat transfer coefficients were also measured by using of thermocouples. The flows on the plate were visualized by the oil-film method to compare the isotherms or the heat transfer contours. Furthermore, the velocity and the turbulence intensity were measured by a hot wire anemometer. It was found that the phenomena of axes switching, which is caused by the differences in the selfinduced velocity in the non-circular vortices, was observed and the heat transfer characteristics well corresponds to the flow patterns.
