長方形噴流の拡散に関する研究 : 第4報, オリフィスおよび平行部のあるノズルからの噴流における混合層発達

概要

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The characteristics of an air jet issuing from two kinds of exit shapes with an aspect ratio of 5 were measured by using hot-wire anemomers. Emphasis was placed on the measurement of the flow field of the two bilaterally symmetric planes of the jet. The measured quantities include mean velocity, turbulence intensity, Reynolds stress and the production term of turbulence energy. It is found that the axial component of turbulence becomes larger than the other components. It is also found that the position of maximum mean velocity gradient, that of maximum Reynolds stress and that of velocity half-width differ from each other on the two symmetric planes, and that the distributions of the Reynolds stress and the production of turbulence energy show a remarkable change according to the exit shapes. In addition, it is interesting that the relative magnitude of the Reynolds stress changes in the planes for the orifice-type jet.
一般社団法人日本機械学会の論文
1991-04-25