从混合沙输沙率增大探究沙粒的流体起动机理——兼析混合沙输沙率增大原因

以混合沙输沙率增大为例，借助室外试验，通过混合沙超前起动探究了沙粒的流体起动机理，提出风力集中等论点。指出风力集中和扩大气流与沙粒接触面积是流体起动机理的两个有机成分。从理论和治沙实践两方面论述了流体起动的重要作用，指出混合沙输沙率增大主要是粗细沙粒相间排列有利于流体起动机理得到发挥的结果

Study on fluid impact mechanism of sandusing sand transportation rate increasement of mixed sand

Taking the increasement of sand transportion rate of mixed sand for example and on the basis of field test,fluid impact mechanism of sand particle has been researched,The results indicate that the concentration wind volecity and the increasing area in which air current can connect with sand particle are two main reasons of fluid impact of sand. Discussing on vital function of fluid impact from theory to practice,the research paper also show that sand transportation rate of mixed sand has increased as a result of gap arrangement between silt sand and coarse sand which contribute to fluid impact of sand.