Study On Bed Quantity When Solid Partilce Is In The Middle State Between Bed And Entire Suspension Of Settling Slurry In Horizontal Pipeline

In the transport project of horizontal pipeline , the research of bed quantity ,which solid partilce is in the middle state between bed and entire suspension ,was very available for the safe function of pipeline and the decreasing friction resistance.Especially,the research of coefficient k4 which was used to describe the solid particle of bed movement state ,not only influenced the mutual effect between the solid particle in pipeline and the pipe-wall,but also influenced the waterpower slope and the velocity distribution in pipeline . The paper established the mathematics equation by the building of mathematics model which was about some influence factors including the thickness of bed load and the fluid characterics of two-phase flow ; the characterics of particle on the basis of present research achievement of professiors and schorlars.The original opinion of research came from the geometry relation.of the bed load and suspension load in the horizonal pipeline.The result of theory calculation was fit to the existent experimental data by inspection.The educed famula in this paper may take as the useful reference of desigination and fuction .