PETR SOBOLIK, JAROSLAV HEMRLE, SADANARI MOCHIZUKI, AKIRA MURATA AND JIRI NOZICKA

The results of an experimental investigation of the effects of Görtler vortices on heat transfer from a uniformly heated concave wall of a rectangular duct to the air flow are reported. The experiments were performed in the range of Reynolds number based on the duct hydraulic diameter of 5x103<Re_H<25x103. A hot wire anemometer and a thermocouple were used to scan the velocity and temperature distributions in planes perpendicular to the main flow. The wall temperature distribution was measured using embedded thermocouples and visualized with a thermochromic liquid crystal foil. Development of the Görtler vortices and their influence on local heat transfer characteristics and overall heat transfer enhancement are discussed.