直交リブ付き矩形直管流路における熱流動現象の計測とLES解析(熱工学,内燃機関,動力など)  [in Japanese] LES Analysis and Measurement of Fully Developed Transverse Ribbed Channel Flows and Heat Transfer  [in Japanese]

A variety of kinds of ribbed channel flow is adopted for the internal cooling structure of 1 300℃ class gas turbine first stage rotor blade. A characteristic of heat transfer of periodic ribbed channel flow was examined by the numerical analysis and the experiment. The Reynolds number of the flow was examined over 100 000 that is assumed with an actual machine. The numerical analysis was done by LES, and examined both of the Smagorinsky model and the Dynamic model as LES turbulence model. On the other hand, flow field was measured by hot wire anemometer in the experiment. The distributions of temperature and heat transfer coefficient were clarified by measuring by thermocouples and thermovision. The numerical analysis results were good agreement with the experiment results, and it was confirmed to such a complex field that LES was an effective means.