ダイナミック PIV と高速赤外線カメラを用いたチャネル乱流における流れ場と温度場の非定常同時測定の試み

抄録

In this study, the oscillations of the heat transfer and flow behaviours near wall region in the channel flow were investigated. The instantaneous flow and temperature distributions are simultaneously measured by using dynamic 2D-2C PIV and the high-speed infrared thermography combined system. Using this system, the unsteady flow behaviours at the xy cross section and heat transfer on the heated wall are investigated in the Reynolds number of 920 based on the skin friction velocity and the channel half width. In order to discuss the flow and the thermal fields, the ensemble-averaged velocity and heat transfer coefficient were calculated by VITA (Variable-interval time-averaging) conditional sampling technique, and it seems that the increasing of the streamwise flow near wall region corresponds to that of the heat transfer enhancement on the heated wall.