Research on Optimization of the Bulb Form of the Bulb Tubular Pump Device for a Low-Head Agricultural Irrigation Pumping Station

A bulb tubular pump unit is a horizontal composed of water and with an electric motor installed. Electric motors, transmission equipment, bearings are usually placed in the bulb. The located flow channel has relatively narrow space. Therefore, shape significant influence on pattern efficiency channel. In this study, CFX 19.2 software was employed to optimize hydraulically according its geometry parameters. research results indicate that at tail elliptical better, hydraulic loss section small, device higher than tail, which round. streamlined support had small resistance, minimal loss, high head efficiency. Nine schemes were selected, geometrical characteristics parameters determined as follows: oval, ratio 0.96, parts streamlined. hold important reference significance improve broaden operating conditions devices.