电厂锅炉设备,在点火、停炉以及遇到紧急事故时,要对空排放蒸汽,产生很强的噪声。声源,除排放蒸汽的喷流噪声外,还由于锅炉内蒸汽压力比外界大气压高得多,导致在排汽管局部范围内产生一系列的激波(冲击波),也辐射出强烈的激波噪声。这种锅炉排汽噪声强度很高,辐射的声功率级往 Power plant boiler equipment, in the ignition, shutdown, and in the event of an emergency, the steam emission to the air, have a strong noise. The sound source, in addition to the jet noise of the steam, also has a series of shock waves (shock wave) generated in the local area of ​​the steam exhaust pipe due to the steam pressure in the boiler is much higher than the outside atmospheric pressure, and also emits a strong shock wave noise. This boiler exhaust noise intensity is high, the radiation sound power level toward