Nonlinear pressure wave analysis by concentrated mass model (3rd report, modeling of enlargement and contraction element)

Satoshi Ishikawa, Takahiro Kondou, Kenichiro Matsuzaki

研究成果: Contribution to journalArticle査読

抄録

A pressure wave propagating in a tube often changes to a shock wave because of the nonlinear effect of the fluid it is traveling through. The purpose of this study is to establish a practical analytical model to analyze this phenomenon. In the first report, a concentrated mass model was proposed to analyze a nonlinear pressure wave phenomenon in a straight cylindrical tube. In this paper, the modeling of an enlargement and a contraction is proposed. The model at the enlargement and the contraction consists of masses, nonlinear pressure elements, base support dampers, and nonlinear dampers. The nonlinear damper is derived from pressure loss at the enlargement and the contraction. To confirm the validity of the proposed model, an experiment on a sound tube with an expansion-chamber muffler is performed and the experimental result is compared with the numerical result obtained by the concentrated mass model. The numerical computational result agrees very well with the experimental result. Therefore, it is concluded that the proposed enlargement and contraction model is valid for the numerical analysis of nonlinear pressure wave problem in a tube with an expansion-chamber muffler.

本文言語英語
ページ(範囲)800-808
ページ数9
ジャーナルNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
76
764
DOI
出版ステータス出版済み - 4 2010

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 産業および生産工学

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