Research Center for Engineering of
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Title: Numerical Model for Cavitational Flow in Hydraulic Poppet Valves
Published In: Modelling and Simulation in Engineering, Volume (2012), Article ID 742162, 10 pages
Description: The paper presents a numerical simulation and analysis of the flow inside a poppet valve. First, the single-phase (liquid) flow is investigated, and an original model is introduced for quantitatively describing the vortex flow. Since an atmospheric outlet pressure produces large negative absolute pressure regions, a two-phase (cavitating) flow analysis is also performed. Both pressure and density distributions inside the cavity are presented, and a comparison with the liquid flow results is performed. It is found that if one defines the cavity radius such that up to this radius the pressure is no larger than the vaporization pressure, then both liquid and cavitating flow models predict the cavity extent. The current effort is based on the application of the recently developed full cavitation model that utilizes the modified Rayleigh-Plesset equations for bubble dynamics.
ISBN: 
ISSN:ISSN: 1687-5605
DOI:doi:10.1155/2012/742162
Publication year: 2012
Keywords:poppet valve, numerical simulation, cavitation
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Authors: BERNAD Sandor , SUSAN-RESIGA Romeo ,
Type: International Journal Article
Link: http://dx.doi.org/10.1155/2012/742162
Laboratory: Numerical Simulation and Parallel Computing Laboratory
Institution: ARFT