平面壁面噴流の組織構造に関する研究 : VITA法およびTD法による解析

概要

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Conditional averages of longitudinal, normal velocity and of their products have been obtained in a fully developed plane turbulent wall jet. For detecting the coherent structure, the VITA technique and TD method were utilized in the inner and the outer region of the wall jet respectively. It was inferred from the ensemble averaged patterns of u- and v- fluctuating velocities that the existence of a pair of counter-rotating spanwise vortices was supported through most of the present wall jet. The strong outflow events found near the location of a detective probe correspond to the trunk of a pair of spanwise vortices, where the ensemble averaged Reynolds shear stress takes a peak value. These events were at an oblique angle of about 25 deg. to the wall.
社団法人日本機械学会の論文
1986-11-25