Abstract
A swirling impinging jet results in a more uniform distribution of heat transfer coefficient compared to that of the conventional impinging jet. In this study, the flow structure of the stagnation region near the wall was investigated by 3D-Particle Image Velocimetry(PIV), and PIV measurements were also compared with LDV data. In PIV measurement, in addition to 2 velocity components, we obtained out-of-plane velocity component by overlapping the laser light sheets of two kinds of wavelength and calculating their cross correlation coefficient.
