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Updated: Jun 30, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
Published on: June 1, 2022
A theoretical model for predicting the startup performance of pumps as turbines
Yu-Liang Zhang1, Yan-Juan Zhao2, Zu-Chao Zhu3
1College of Mechanical Engineering, Quzhou University, Quzhou, 324000, China. zhang002@sina.com.
Abstract:
Using the unsteady Bernoulli equation for the piping system and the angular momentum equation for the rotor, derives here a theoretical model to predict the startup performance of a pump as turbine (PAT). This model is effective for predicting the instantaneous evolution characteristics of the main performance parameters of PAT during startup, and these changings are initially faster and then slowly as a whole. The effect of the rotor moment of inertia and the final stabilized rotational speed of PAT on evolution characteristics of parameters is opposite. The rotational speed, head, hydraulic power, and conversion efficiency show a upward rising trend with the startup time, whereas the flow rate and hydraulic head loss display a downward trend.
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