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Modelling and Simulation in Engineering
Volume 2017 (2017), Article ID 1015494, 9 pages
https://doi.org/10.1155/2017/1015494
Research Article

Research on Distribution of Flow Field and Simulation of Working Pulsation Based on Rotating-Sleeve Distributing-Flow System

1Mechanical and Electrical Engineering College, Qingdao University, Qingdao 266071, China
2Power Integration and Energy Storage Systems Engineering Technology Center, Qingdao University, Qingdao 266071, China

Correspondence should be addressed to Hongxin Zhang; moc.621@xhzudq and Qinghai Zhao; moc.361@tibhqz

Received 21 May 2017; Revised 2 August 2017; Accepted 9 August 2017; Published 1 November 2017

Academic Editor: Agostino Bruzzone

Copyright © 2017 Yanjun Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To solve problems of leakage, vibration, and noise caused by disorders of flow field distribution and working pulsation in the rotating-sleeve distributing-flow system, governing equations of plunger and rotating sleeve and computational fluid dynamics (CFD) model are developed through sliding mesh and dynamic mesh technology to simulate flow field and working pulsation. Simulation results show that the following issues exist: obviously periodic fluctuation and sharp corner in flow pulsation, backward flow when fluid is transformed between discharge and suction, and serious turbulence and large loss in kinetic energy around the damping groove in transitional movements. Pressure in the pump chamber rapidly rises to 2.2 MPa involving over 10% more than nominal pressure when the plunger is at the Top Dead Center (TDC) considering changes about damping groove’s position and flow area in two transitional movements. Shortly pressure overshoot gradually decreases to a normal condition with increasing flow area. Similarly, pressure in the pump chamber instantaneously drops to a saturated vapor pressure −98.9 KPa when the plunger is at the Bottom Dead Center (BDC). With increasing flow area the overshoot gradually increases to the normal condition. This research provides foundations for investigating flow field characteristic and structure optimization of rotating-sleeve distributing-flow system.