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Title: Estimation of breakout sound power level due to turbulence caused by an in-duct element
Other Titles: 管道内部湍流所引起的泄漏噪声之声强级估算 (英文)
Authors: Han, N
Mak, CM 
Keywords: Drag pressure
Turbulent flow
Breakout noise
Issue Date: 2007
Publisher: 中国学术期刊(光盘版)电子杂志社
Source: 声学技术 (Technical acoustics), Dec. 2007, v. 25, no. 6, p. 653-657 How to cite?
Journal: 声学技术 (Technical acoustics) 
Abstract: 在管道通风系统中的湍流区内,震荡波动的阻力气压与推力气压之间的关系已被阐述。根据Nelson与Morfey的设定,在流体质元所受波动阻力和稳态阻力之比恒定的条件下,文中推广了一种基于气压值的计算方法,用来推算由管道内部因素与湍流作用所引起的管道壁泄漏噪声之声强级。
The relationship between the fluctuating drag and lift pressures in the turbulent area within a flow duct is given. Based on the assumption of Nelson and Morfey that there is a constant of proportionality between the fluctuating drag force and the steady state drag force acting on an in-duct element, a pressure-based technique is proposed for estimating the breakout noise due to the vibration of the duct wall caused by the interaction of the turbulent flow and the in-duct elements.
ISSN: 1000-3630
Rights: © 2007 中国学术期刊电子杂志出版社。本内容的使用仅限于教育、科研之目的。
© 2007 China Academic Journal Electronic Publishing House. It is to be used strictly for educational and research purposes.
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