B213 チャネル内乱流構造に及ぼす上壁面スパン方向スライドの影響に関する三次元直接数値シミュレーション

概要

論文の詳細を見る
The fluid in the field of turbomachinely receives strong sheer stress from the walls to the right angle with streamwise direction. Understanding the characteristics of this effect to the turbulent flow field is of great importance to optimize the shape of compressor and turbine for more efficient turbo machines. We performed direct numerical simmlation of the fully developed turbulent channel flow between a fixed and a sliding infinite wall at the right angle to the streamwise direction. Our results will be available to construct and evaluate models for this kind of flows. By the effect of sliding wall, mean flow becomes asymmetric and the turbulent structure changes to be complicated. Turbulent structures of mainstream become small and incline to the spanwise direction. Friction coefficients at the wall rise and mean flow rate decreases. Finer mesh is needed to calculate this kind of skewed flow field.
日本流体力学会の論文
2001-07-31