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Numerical investigation on screw rotor deformation and influence on volumetric efficiency of the twin-screw multiphase pump

Yin, X, Cao, F, Pan, S, Song, Y, Fei, J and Wang, X ORCID: 0000-0003-4293-7523 2017 , 'Numerical investigation on screw rotor deformation and influence on volumetric efficiency of the twin-screw multiphase pump' , Applied Thermal Engineering, vol. 111 , pp. 1111-1118 , doi: 10.1016/j.applthermaleng.2016.10.027.

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Abstract

The thermal and force deformation model was established to investigate the rotor deformation and its effect on the volumetric efficiency of the twin-screw multiphase pump with high gas volume fractions (GVFs). Based on the ANSYS software, the deformations under different GVFs were calculated. The influence of the deformations on the clearance, the leakage flow rate and the volumetric efficiency was then analyzed. It was found that the largest clearance variation under the deformation was the radial clearance, followed by the circumferential clearance, and there was little change in the flank clearances. With the GVF increasing from 80% to 94%, the pump volumetric efficiency increased gradually. However, it decreased sharply when the GVF exceeded 94%. Finally, the rotor clearances were analyzed and optimized, and the recommended mounting clearances were proposed, which could decrease the leakage and prevent the rotor from being stuck when large deformations occurred.

Item Type: Article
Authors/Creators:Yin, X and Cao, F and Pan, S and Song, Y and Fei, J and Wang, X
Keywords: rotor deformation, thermal expansion, twin-screw multiphase pump, volumetric efficiency, gas volumetric fractions
Journal or Publication Title: Applied Thermal Engineering
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 1359-4311
DOI / ID Number: 10.1016/j.applthermaleng.2016.10.027
Copyright Information:

Copyright 2016 Elsevier Ltd. All rights reserved.

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