ボルテックスジェネレータが矩形流路内の流動と熱伝達に及ぼす影響

－PIV 速度分布計測と CFD 数値解析－

抄録

PIV measurement and CFD numerical analysis were conducted to investigate the effect of rectangular vortex generator (VG) on flow and heat transfer in the rectangular channel, respectively. Since pressure on the lower side of VG is higher than the upper side, air flows into the side of the VG, two longitudinal vortexes of the channel central symmetry are generated. It was found that heat transfer coefficient in the wake of VG increases because the vortexes decrease viscous length over the face mounted VG. Furthermore, the vortexes transport hot gas in center of channel to the face, and the thermal boundary layer becomes thin.