摘要
应用麦克风、频谱分析软件等相关工具,研究了三通道喷嘴无水条件下的噪声性能。实验结果表明随着三通道气流马赫数逐渐增大,噪声强度随之增大,峰值频率基本不变,但能量变强;随着一通道气流马赫数增大,噪声强度先减小后增大,并且频谱图上出现高频峰,该峰能量逐渐变强;改变一、三通道气体喷口流速比,噪声强度呈现减小、增大、减小的非均匀变化趋势,峰值频率逐渐变大。
The noise characteristics of 3-channelusing microphone and spectrum analysis software.nozzle were investigated, in the absence of water,When Ma in channel 3 increased, noise intensity increased monotonously; frequency of the peak remained the same, but its power became stronger. When Ma in channel 1 increased, noise intensity decreased initially but then increased; the high frequency peak appeared, and its power became stronger. Changing the ratio of air velocity in nozzle of channel 1 to channel 3, the noise intensity decreased, then increased, and decreased again~ frequency of peak increased.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第4期524-527,共4页
Journal of East China University of Science and Technology
基金
国家重点基础研究发展规划资助项目(G1999022103)
关键词
喷嘴
噪声分析
噪声强度
峰值频率
nozzle
noise analysis
noise intensity
frequency of peak
