本刊今年第1期“问题与讨论”栏中的“如何设计消声器”刊出了某厂高压蒸汽排放消声器取得良好降噪效果的设计实例.编辑部要我结合此例谈谈有关排气放空消声器的设计问题.其实近年来已有不少书刊资料均有阐述,这里再谈一些初浅意见,供深入讨论参考.第1期中介绍的用于高压蒸汽排放的“综合型消声器”是一个包括变径扩容、孔板节流及通道弯折作用的耗散型消声段和后续阻性加迷路孔板管消声段所组成的复合式排气消声器.前段主要消声原理是节流减压及扩容减速,它能有效地降低高压高速排气所辐射的湍流噪声;而后续阻性段的主要原理显然是利用多孔吸声材料沿程吸收声能、降低噪声,从实测消声量(插入损失)可见此消声 This issue of the first issue of this year, “Problems and Discussions” column “How to design muffler” published a factory high-pressure steam discharge muffler to achieve good noise reduction effect design examples Editorial Department I have to combine this case to talk about the exhaust vent In fact, there have been many books and periodicals have elaborated in recent years, here to talk about some preliminary comments for in-depth discussion and reference .In the first phase for high-pressure steam emissions “comprehensive muffler” is a Reducing expansion, orifice throttling and channel bending dissipative muffler segment and follow-up of resistive plus obtuse orifice plate muffler composed of composite exhaust muffler. The main front anechoic principle is the throttle Pressure and expansion deceleration, which can effectively reduce the turbulent noise emitted by high-pressure high-speed exhaust; and the main principle of the subsequent resistive section is obviously the use of porous sound absorption material to absorb sound energy along the process to reduce noise, measured from the actual volume Loss) visible this silencer