沉降性浆体在水平管道内输送时的水力坡度

HYDRAULIC GRADIENT FOR SETTLING SLURRY FLOW IN HORIZONTAL PIPE

从固体颗粒加速期间清水与固体颗粒的速度变化、动量传递、相关质量等基本问题分析入手，研究了沉降性浆体在水平管道内流动时其固体颗粒在３种流动状态下的水力坡度，提出了沉降性浆体在水平管道内流动的机理模型，进而用该模型对一些输送条件下的沉降性浆体的水力坡度进行了计算。对实际问题的理论计算结果与实测结果的对比分析表明，该模型能比较精确地预计上述几种流动状态下水平管道内沉降性浆体的水力坡度。

The hydraulic gradients of settling slurry flow transported in three kinds of moving states, i. e. suspension, saltation, or partially suspension were investigated, based on analyzing the changes of solid particles and water in momentum, velocity and their mass related to momentum exchanging over the acceleration period of the solid particles. Then a new mechanism model was proposed about the hydraulic gradient of settling slurry flow in horizontal pipe and a number of hydraulic gradients of settling slurry flow were calculated, the results of the hydraulic gradient and the analyses about the comparison between the calculated and the experimental results enunciated that the hydraulic gradient of settling slurry flow flowing in these states mentioned above can be accurately expected in the new model.