G133 吹出し、吸込みによる後向きステップ乱流の伝熱促進(G-13 せん断流れ(3),一般講演)

概要

論文の詳細を見る
Experiments have been performed for a turbulent channel flow over a backward-facing step. The backward-facing step is controlled by equipping a slit at the bottom corner of the step. Low momentum fluids in the recirculating region are sucked or high momentum fluids are injected from the slit. The width of the slit is changed between 2, 3 and 5mm, and the flow ratio is varied from 0.00 to ±0.15. The wall static pressure and local heat transfer coefficient are measured behind the backward-facing step. In addition, the velocity profiles and turbulent intensities are measured by a split hot film probe. It is found that the heat transfer and pressure drop characteristics are controlled by the flow ratio. If suction is applied, the pressure loss coefficient decreases and the heat transfer coefficient increases. Enhancement of the heat transfer is related to the increase of turbulence intensity.
日本流体力学会の論文
2004-08-09