Development of the equipment to suppress low frequency nappe oscillation

Takuo Nagamine, Yuichi Minegishi, Akira Sekiya, Masahiro Goto, Kyouji Takaki, Hiroki Mori, Yuichi Sato

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This paper describes experimental study of nappe oscillation at a weir which is two meters high.Falling water sheet flowing over a weir sometimes oscillates at a low frequency.The water sheet oscillation causes low frequency sound problems.So far, spoilers are used to prevent from such vibrations. We develop the new equipment to suppress low frequency oscillation and investigate how to suppress low frequency sound from nappe oscillation. Its sound can be suppressed by setting equipment at the lower end of a falling water sheet. Experimental results show the characteristic of nappe oscillation and effectiveness of the equipment on low frequency sound.

Original languageEnglish
Pages (from-to)2211-2220
Number of pages10
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number778
Publication statusPublished - 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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