Pressure Measurement in Fully Developed Turbulence

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  • 乱流中の変動圧力の計測について
  • ランリュウ チュウ ノ ヘンドウ アツリョク ノ ケイソク ニ ツイテ

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Static pressure fluctuation is an important ingredient in turbulence, however the variation of the pressure fluctuations inside turbulence has not been studied so far. One reason for this is the difficulty inherent in measuring the fluctuating pressure and, consequently, a lack of published experimental results of this quantity. In this paper, pressure fluctuation is measured in turbulence using a condenser microphone and piezoresistive transducer. We summarize the matters to be attended to careful measurements and present a new method to remove the effect of resonance and standing waves. In order to check the accuracy of measured data, turbulence energy balance in a wake of cylinder is computed. Also, the statitical quantities, such as spectra and probability density function are compared with DNS.

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