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泥石流固液分相流速是泥石流对岸坡、防治结构冲击、磨损机理的核心问题.将泥石流体简化为具有相同粒径的固相和具有相同力学性质的液相,基于泥石流体为沿流动方向的一维两相流体,运用两相流理论建立了泥石流固液分相流速控制方程.构建了泥石流平均压力、彻体力及平均表面力的计算方法,尤其通过浆体的Binhanm体流变方程、Bagnold颗粒相互作用试验成果建立了控制体平均表面力计算方法;建立了固液两相流速比例系数,以及理论固相流速与实际流速的比例系数.据此求解控制方程得到了固液分相流速计算方法,该方法既可同时适用于粘性泥石流和稀性泥石流,也可在泥石流爆发以后通过现场采集沉积物分析反求泥石流爆发期间的分相流速.工程实例分析显示,该方法计算结果与实测结果吻合较好.
Debris Flow The solid-liquid phase velocity of debris flow is the core issue of the debris flow on the bank slope, the mechanism of impact and wear of prevention and control structure.The debris flow fluid is simplified as the solid phase with the same particle size and the liquid phase with the same mechanical properties, One-dimensional two-phase fluid, the use of two-phase flow theory established the flow rate of solid-liquid phase flow debris flow control equations.Establish the debris flow average pressure, the total body force and the average surface force of the calculation method, especially through the slurry Binhanm body rheological equations, Bagnold Particle interaction test results were established control body average surface force calculation method; established the solid-liquid two-phase flow rate coefficient, and the theoretical solid-phase flow rate and the actual flow rate coefficient. Solve the governing equations obtained solid-liquid phase velocity calculation The method can be applied to viscous debris flow and dilute debris flow simultaneously, and also can be used to analyze the phase separation flow rate during the debris flow outbreak after the debris flow bursts outbreak.The engineering example shows that the calculated results are in good agreement with the measured results Good agreement.