21005 衝撃波による薄肉円板の動的応答(センサー・超音波,OS.12 流体計測技術の新展開,学術講演)

概要

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The new technique, which utilizes a single pressure history at the pressure transducer, is proposed to obtain a local Mach number of shock wave propagating in a pipe. In this technique, however, it is assumed that the sensitive head of the pressure transducer is infinitesimal in diameter and the head is loaded by the stepwise pressure. This assumption influences the accuracy of the scheme. In this study, in order to improve the accuracy of the scheme, the dynamic response of the thin circular plate of the sensitive head is numerically analyzed and the numerical result is compared to the pressure history by the experiment. In addition, the obvious relation is obtained between the peak value of the pressure history and the Mach number considering the magnitude and the propagating velocity of the shock wave.
2008-03-13