高温吸声结构的声学性能研究
COUSTICAL PROPERTIES OF SOUND ABSORBING STRUCTURES AT HIGH TEMPERATURE
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摘要: 本文从分析温度对多孔材料的性能影响入手,对燃气轮机排气装置中常用的有限厚度吸声层在高温及存在温度梯度时的声学性能进行了理论分析,并通过高温试验验证,证明理论分析与实际是一致的。Abstract: The acoustical properties of sound absorbing layers used in gas turbine exhaust silencing component at hi gh temperature with temperature gradient were investigated by analysing the effect of temperature on t he acoustical properties of porous materials.Some experimental results are given and a good agreement is found between theoretical prediction and measurements of acoustical properties at various temperatures up to 500℃.
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