812 乱流中の変動圧力の測定について(OS8-3 複雑乱流の計測と制御(計測),OS8 複雑乱流の計測と制御,オーガナイズドセッション)

概要

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Static pressure fluctuations are an important ingredient in turbulence, but little is known about it. In this study, static pressure is measured by using small transducer and microphone. On the centerline of jet, both the probability density function of static pressure and the Reynolds number dependence of spectral shapes match that of DNS in homogeneous isotropic turbulence. Also the turbulence energy balance is checked in the wake of tow-dimensional cylinder. These results encourage us to investigate the pressure statistics in fully developed turbulent boundary layer. Results on mean and fluctuation distributions, spectra, Reynolds number dependence, and correlation functions are reported. Also, the first attempt is made to verify Kolmogorov's -7/3 power-law scaling of the pressure spectrum in the limit of high Reynolds numbers in a turbulent boundary layer.
社団法人日本機械学会の論文
2005-10-28