スリットから吹出し・吸込みを伴う乱流境界層のバースト現象

概要

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Organized structures to make clear bursting phenomenon of turbulent boundary layers with injection and suction through a slit have been investigated experimentally. Conditional sampling with VITA and quadrant analysis have been applied and space-time correlation has been measured. Moreover, the relationship between bursting phenomenon and wall pressure has been investigated. These results show that the contribution from ejection of bursting phenomenon to mean Reynolds stress - <uv>^^- near the wall decreases by injection through the slit and increases by suction through the slit. This in the reason that mean Reynolds stress near the wall decreases by injection and increases by suction. Space-time correlation of velocities indicates that coherent structure with oblique angle to the wall exists in boundary layer. The oblique angle to the wall becomes larger with injection.
一般社団法人日本機械学会の論文
1984-12-25