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在作者前期研究及相关学者的研究成果的基础上,推导出了基于两层模型的滑动床上方水沙浆体浓度分布计算模型,进一步结合剪切层浓度线性分布特点,给出了考虑剪切层的三层浓度分布计算模型。通过粒径为1.71 mm的粗砂颗粒高浓度管道流动试验,测定了水平管道和倾斜管道中不同条件下若干组大颗粒浓度分布随倾角变化的试验数据。浓度分布实测值与作者浓度分布模型计算值对比分析表明,三层浓度计算模型较两层浓度模型,能够较为准确预测滑动床上方的粗颗粒浓度分布情况。
Based on the previous studies of the author and the research results of related scholars, the calculation model of the concentration distribution of the slurry on the sliding bed is deduced based on the two-layer model. Combining with the linear distribution of the shear layer concentration, The three-layer concentration distribution calculation model. The test data of the variation of several large particle concentration distributions with different angles in horizontal and inclined pipelines were measured by high-concentration grit flow test with a particle size of 1.71 mm. The comparison between the measured data of concentration distribution and the calculated values of the authors’ concentration distribution model shows that the three-layer concentration model can predict the coarse particle concentration distribution above the sliding bed more accurately than the two-layer concentration model.