Contraction Coefficient of a Thick Orifice for Compressible Flows

Hiroyuki Hirahara, Naohiro Nakano, Toshiyuki Aoki, Kazuyasu Matsuo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The purpose of the present is to report a contraction coefficient of a two-dimensional thick orifice for compressible flows. An experimental investigation was performed using a shock tunnel, and the orifice flow was visualized by a color schlieren method. The experimental results show that the compressible flows through an orifice can be classified into three patterns and the contraction coefficient of a thick orifice increases with increase in the length-height ratios.

Original languageEnglish
Pages (from-to)1785-1788
Number of pages4
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number515
Publication statusPublished - 1989

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering


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