Performance prediction of automotive centrifugal coolant pumps

Automotive coolant pumps conform to none of the traditional criteria necessary for predicting centrifugal pump performance. Mast methods rely upon calculating how throughput using Euler's theory of vortices. Empirical formulae for incurred energy losses, modify Euler`s calculations, thereby estimating actual performance. The technique has limitations, suited only to large capacity pumps, operating at constant speed, with zero friction head.. This approach in predicting performance of small capacity, variable speed applications, with a large friction head, is questionable. The paper highlights predictive modelling techniques, and considers the relationship between geometry and optimal performance in small centrical pumps, incorporating related energy losses.