由于管壁的摩擦阻力和管内流体速度的改变 ,多孔管内的压力沿轴向不断发生变化。就此基于水力学原理推导出多孔配水管内各种变量间的无量纲关系式 ,并给出了变孔径多孔配水管水力设计的一种简易方法 Due to the frictional resistance of the pipe wall and the change of the velocity of the fluid in the pipe, the pressure in the porous pipe changes continuously in the axial direction. Based on the principle of hydraulics, a dimensionless relation between variables in a porous distribution pipe is derived, and a simple method for designing the hydraulic design of a variable pore size distribution pipe is given