文章摘要
韩宁,麦卓明.管道内部湍流所引起的泄漏噪声之声强级估算[J].声学技术,2006,(6):653~657
管道内部湍流所引起的泄漏噪声之声强级估算
Estimation of breakout sound power level due to turbulence caused by an in-duct element
  
DOI:
中文关键词: 阻力压  湍流  泄漏噪声
英文关键词: drag pressure  turbulent flow  breakout noise
基金项目:
作者单位
韩宁 香港理工大学屋宇设备工程学系, 中国香港特别行政区 
麦卓明 香港理工大学屋宇设备工程学系, 中国香港特别行政区 
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中文摘要:
      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。
英文摘要:
      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 induct 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 induct elements.
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