Pressure Drop Calculator

Calculates pressure drop (head loss) of a fluid, in straight circular pipes due to friction. Input parameters for this app is pipe diameter, lenght of pipe, pipe roughness (app includes default values for widely used pipes), flow rate in several expressions, and physical properties of the flow medium). At first the Darcy friction factor f,is calculated depending upon the type of flow that exist in the pipe. So, if Reynolds number is less than 2000 (laminar flow), the f=64/Re formula is used to calculate the friction factor f. If Reynolds number is more than 2000 (transition or turbulent flow), an approximation of the Colebrook equation (Swamee-Jain equation) is used in order to calculate friction factor f. Then Darcy-Weisbach equation is used finally to calculate the pressure loss.

计算流体的压力降（水头损失），在由于摩擦直圆管。输入参数为这个应用程序是管道直径，管道长度，管道粗糙度（应用程序包括广泛用于管道的默认值），在几个表达式流速和流动介质的物理性质）。在第一达西摩擦系数f，是根据流中存在的管的类型来计算。所以，如果雷诺数小于2000（层流）时，F = 64/Re公式用于计算的摩擦系数f。如果雷诺数超过2000（过渡或紊流），在科尔布鲁克公式（Swamee-耆那方程）的近似被用来以计算摩擦系数f。然后达西 - 魏斯巴赫公式用于最终计算出的压力损失。