1. The local resistance coefficient is related to the change of fluid direction and velocity. Its specific function is to calculate the energy loss of fluid under the action of local resistance.
2. The local resistance coefficient is the ratio of the local resistance generated when the fluid flows through the equipment and pipeline accessories to the corresponding dynamic pressure, and its value is dimensionless.
Extended data:
Local resistance loss-the calculation of local resistance coefficient and equivalent length usually adopts the following approximate method.
1, it is approximately considered that the local resistance loss obeys the square law:
2, approximately think that local resistance loss can be equivalent to a certain length of straight pipe, that is
3. Local resistance loss: the mechanical energy loss caused by pipe fittings is called local resistance, and the resistance loss is manifested as the reduction of fluid potential energy. According to the mechanical energy balance formula,
References:
Baidu encyclopedia-local resistance coefficient