Scholte波与含泥沙两相流介质属性关系的分析及仿真验证

Analysis and experimental verification of the relation between Scholte wave velocity and sediment containing two-phase fluid properties

基于四种超声悬浮液模型Urick,Urick-Ament,HT,Mcclements分析了Scholte波在两相流体与多孔介质固体界面处的传播特性.结合各模型的复波数表达式建立含泥沙流体-多孔介质固体界面波特征方程,分析了Scholte波速与两相流体积含量、粒径等介质属性的关系.通过仿真实验获得界面波信号,运用时延估计获得Scholte波速与泥沙含量、粒径的关系,发现所得的波速与Urick-Ament和HT理论有相对好的一致性.

Based on several ultrasonic suspension models, i.e. Urick, Urick-Ament, HT and Mcclements, the Scholte wave propagation characteristics are analyzed at the interface between sediment concentration two-phase fluid and porous medium solid. The interface wave propagation characteristic equation are found using the complex wave number equation given by the aforementioned four mod-els. Relationships between Scholte velocity and the two-phase fluid properties, （e.g., dispersion, volume content, particle size） are discussed. Scholte wave propagation and signal are obtained by Comsol simulation. By using the time delay estimation method, it is found that the obtained Scholte wave velocity are in accord with that given in Urick-Ament and HT models.