238 集中系モデルによる水中圧力波の解析

概要

論文の詳細を見る
A pressure wave propagating in a tube often changes to a shock wave because of the nonlinear effects in the propagation medium. In the previous papers, a concentrated mass model was proposed to analyze a nonlinear pressure wave phenomenon in air. In this paper, we apply the model to pressure wave in water. When an ultrasonic pressure wave propagates in water, the wave often changes to a shock wave in shorter distance than low-frequency wave. And, when water contains air bubbles, speed of sound decrease significantly by bubbles. The purpose of this study is to establish a practical analytical model to analyze these phenomenon. To confirm the validity of the proposed the model of supersonic pressure wave, we compare the experimental result of supersonic pressure wave by Burox et al. with the numerical results obtained by the concentrated mass model. Furthermore we perform experiments of water containing air bubbles, and compare the experimental result with numerical result obtained by the concentrated mass model.
一般社団法人日本機械学会の論文
2011-09-05