A New Method For Computing Minimum Flow
Appropriate specification of minimum flows is important to avert pump reliability problems. A method is presented for the calculation of minimum flow by allowing a satisfactory margin below the onset of flow recirculation in the impeller. A semi-analytical method is proposed for the calculation of recirculation onset. The margins depend upon size, speed, specific gravity of pumped fluid, NPSH available, intermittence of operation and mechanical design. Empirical charts are provided for estimating these margins.
Gopalakrishnan, S. (1988). A New Method For Computing Minimum Flow. Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University. Available electronically from