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.
|Number of pages||10|
|Journal||Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C|
|Publication status||Published - 2011|
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering