Numerical investigation of flow characteristics in twin-screw pump under cavitating conditions

Yan, D., Kovacevic, A., Tang, Q. & Rane, S. (2017). Numerical investigation of flow characteristics in twin-screw pump under cavitating conditions. IOP Conference Series: Materials Science and Engineering, 232(012026), doi: 10.1088/1757-899X/232/1/012026

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Abstract

In order to investigate the flow characteristics and the formation process of cavitation in twin-screw pumps, three-dimensional CFD (Computational Fluid Dynamics) numerical analysis has been carried out. A conformal structured moving mesh generated by an in-house code SCORG was applied for the rotor domain. The VOF (Volume of Fluid) Method has been adopted for dealing with the liquid-gas two-phase flow, while the bubble dynamics was handled by a homogenous cavitation model. By changing the rotation speed and discharge pressure, the intensity, distribution area and variation of cavitation at different rotor angle were obtained. The effects of rotation speed and discharge pressure on cavitation characteristics have been analysed. Calculation results with cavitation model are compared with the results without cavitation and the experimentally obtained values. The influence of cavitation on the performance of a screw pump in terms of the mass flow rate, pressure distribution, rotor torque and the shaft power have been analysed and discussed.

Item Type: Article
Additional Information: This is an author-created, un-copyedited version of an article published in IOP Conference Series: Materials Science and Engineering. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This article is published under a CC BY licence. The Version of Record is available online at https://doi.org/10.1088/1757-899X/232/1/012026.
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/18564

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