軸対称衝突噴流よどみ領域の乱流特性

概要

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Turbulence statistics in the stagnation region of an axisymmetric jet impinging vertically on a flat plate were reported. Particle tracking velocimetry was used for the measurement of highly turbulent flow near the stagnation point. The mean momentum balance was examined to clarify the effect of the turbulent normal stress on the momentum transport in the vicinity of the wall. Distributions of the turbulent stresses and the triple correlations of the velocity fluctuations were presented. The state of turbulence was studied by means of the invariant map of the turbulent stress anisotropy. The budget equation for the turbulent kinetic energy was evaluated, and it was revealed that the negative production was taking place in the vicinity of the wall. Some other features of the budget were also discussed.
社団法人日本機械学会の論文
1996-02-25