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Head loss factor k of many hydraulic components is available in handbooks but for complex shapes such as headers, there is no standard value. The purpose of this study is to help hydraulic designers to predict a value for the head loss factor in headers based on their geometric parameters. The analysis is carried out solving the Navier-Stokes equations by means of numerical methods. In this study, one parameter is changed and all the others are fixed to predict the effect of that specific parameter on the head loss factor. Results show that: 1- Increasing the chamber diameter increases the head loss factor k. 2- Increasing the chamber length increases the head loss factor k until it reaches its critical value and then remains fixed. 3- Increasing the outlet diameter decreases k.

The effect of geometric parameters on the head loss factor in headers