| The research of acoustic propagation characteristics is a very important theoretical problem encountered in the measurement of temperature field in furnace by acoustics and the acoustic detection for tubes leakage and the monitoring state of gas-solid two-phase flow by acoustic method. Acoustic attenuation mechanism in gas-solid two-phase flow is discussed in this paper. Consulting the law of Lambert-Beer, the way to calculate acoustic attenuation coefficient is given. The experiment table has been designed and built up. In the experiment, the regulation which demonstrates the attenuation coefficient varies with the frequency, concentration and particle size in the gas-solid two-phase flow is researched. The mathematical models of acoustic attenuation coefficient varied with the concentration are deduced in different frequency by linear fitting, which set the base of the measurement of temperature field in furnace by acoustics and the acoustic detection for tubes leakage and the monitoring state of gas-solid two-phase flow by acoustic method.
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