G122 逆圧力こう配乱流における速度と温度乱れの高次スペクトル

概要

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Characteristics of turbulent boundary layer flows with adverse pressure gradients (APG) differ significantly from those of canonical boundary layers. We have investigated the effects of APG on the higher-order moments and spectra of velocity and temperature fluctuations in a thermal boundary layer developing on the uniformly heated plate. It is found that, in the APG boundary layer, the momentum and heat transfers occur in the direction toward the wall from the region away from the wall. The structural change in APG flow causes the non-local interactions between the temperature fluctuations and the wall-normal motions. However, the situation is fairly complex because the heat transport is mainly determined by the ejection motions, which are not significant contributors to the momentum transport in the APG flow.
一般社団法人日本機械学会の論文
2003-11-10