1　前言流体在运动过程中 ,克服内部切应力所作的功 ,将它的一部分机械能转化为热能 ,从而形成了能量损失。流体在散热器中流动 ,由于流动的粘滞性和惯性 ,以及散热器串片管壁面对流体的粘滞作用和扰动作用 ,使得流体经过散热器后 ,形成了能量损失 ,用压力损失来反映 ,阻力系数 1 Introduction In the course of motion, the fluid overcomes the work done by the internal shear stress and converts part of its mechanical energy into heat energy, thus forming an energy loss. The fluid flows in the radiator. Due to the viscosity and inertia of the flow, as well as the viscous and turbulent effects of the radiator string facing the fluid, the fluid passes through the radiator, forming an energy loss and using pressure loss. Reflected, resistance coefficient