摘要
研究了影响三通道喷嘴噪声声级的相关因素。实验研究结果表明,总气体流量一定时,一通道气体流量分率的变化,可导致噪声15dB左右的变化。同时,水量加入引起的雾化,改变了喷嘴噪声产生的机理。二通道水量在一定范围内可以消减噪声,范围之外,水量增加引起噪声变大。一、三通道气体流量的增大皆导致了噪声的单调增大。
Some factors that affect the sound level of the noise emitted from a three-channels nozzle were investigated. The results show that the occupancy of gas flow in channel 1 makes noise change about 15 dB while maintaining the total gas flow unchanged, and atomization caused by water injection changes the mechanism of noise producing from nozzle. Water in channel 2 can decrease the noise in a certain range and out of this range, the rising of the water flow brings the increasing of the noise. The rising of gas flow in channel 1 or channel 3 also makes noise increase monotonically.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第6期88-90,共3页
Journal of Vibration and Shock
基金
国家重点基础研究发展规划资助项目(2004CB217703)
国家"863"计划资助项目(2003AA521021)
关键词
喷嘴
噪声
声级
雾化
Acoustic noise
Atomization
Flow of fluids
Gases
Water injection
