锅炉过热器泄漏声波声谱特性的实验研究

Experimental Study on Leakage Acoustic Wave in Boiler Superheater

通过搭建管阵列实验平台,对过热器的泄露声波进行实验研究。以通过管阵列的泄漏声波信号为对象,分析其经过管阵列传播后的频谱特性,得到声波的变化规律:泄露压力越大,声压衰减的越快;泄露孔越大,声波禁带宽度越大,声波禁带中心频率越低。

According building the tube rows experimental platform, the leakage acoustic wave in the superheater was studied in this paper. Taking the signal of the leakage acoustic wave as the investigative object, which pass the tube rows, the spectrum characteristic after propagation was analyzed. It is concluded that： one, the bigger leakage pressure, the faster sound pressure decay, and two, the bigger leakage aperture, the bigger breadth of acoustic band-gap, the lower center frequency of acoustic band-gap.