熱線流速計による測定値の数値実験 : 正規分布高強度乱流の平均速度

概要

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The domains of the spatial distribution of the turbulence velocity for the convergence of the series equation, obtained from a general hot-wire response equation and generally used in a high turbulence intensity flow, are shown by using a computer graphics technique for the case of an 1-probe. The turbulence velocity of an actual circular free jet was experimentally confirmed to exceed the domain of the convergence. Based on the normal distribution of the turbulence velocity, numerical experiments were carried out on the output from a hot-wire 1-probe and on the accuracy of the corrected mean velocity. The results show that the magnitude of the mean effective cooling velocity is always larger than the true mean velocity and dependent on spatial distribution and intensity of turbulence velocity as well as the yaw and pitch factors, and that there is an optimum number of terms of the series equation to obtain the most accurate mean velocity.
一般社団法人日本機械学会の論文
1990-05-25