动力设备中蒸汽喷注噪声的研究  

A Study on the Hissing Noise of Injecting Steam in Steam Power Equipments

作　　者：马宪国[1] 陈之航[1] 赵在三[1] 

机构地区：[1]上海理工大学

出　　处：《动力工程》1998年第2期60-64,共5页Power Engineering

摘　　要：探索了动力设备中蒸汽在水下有限空间内喷注时喷注噪声的声源与辐射规律，发现蒸汽喷注噪声声压级及频谱和水的过冷度有直接关系；喷头孔径对最大喷注噪声声压级的影响不大；但较大的孔径可以使最大声压级出现的位置向低温处移动，而较小的孔间距可降低喷注噪声。同时发现蒸汽水下喷注噪声的产生机理和空气动力性噪声的产生机理是不完全相同的，因此蒸汽或空气在大气中喷注噪声的研究结果不能直接应用于蒸汽水下喷注噪声。Abstract The noise source and its law of propagation,when steam is ejected below water surfaces in a limited space,is being examined,and it has been detected that the sound pressure level and its frequency spectrum is directly connected with the water's degree of supercooling;the nozzle diameter of the ejector having only a minor inffuence on the magnitude of the highest sound pressure level of the steam ejection,but would cause it to appear at locations of lower temperature,while smaller orifice pitches would reduce the ejection voise.Simultaneously,it was found that the mechanism of sound development of steam injection in water is not quite the same as that of aerodynamic noise and therefore study results of noise caused by steam or air ejections in the atmosphere can not be directly transferred to cases of steam ejection below water surfaces.

关 键 词：动力设备 蒸汽喷注噪声 噪声控制 

分 类 号：TK05[动力工程及工程热物理] TB53[理学—物理]