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Metering Characteristics of a Closed Center Load - Sensing Proportional Control Valve
ISSN: 1946-391X, e-ISSN: 1946-3928
Published October 06, 2009 by SAE International in United States
Citation: Bottazzi, D., Franzoni, F., Milani, M., and Montorsi, L., "Metering Characteristics of a Closed Center Load - Sensing Proportional Control Valve," SAE Int. J. Commer. Veh. 2(2):66-74, 2010, https://doi.org/10.4271/2009-01-2850.
The investigation of the flow through the metering section of hydraulic components plays a fundamental role in the design and optimization processes. In this paper the flow through a closed center directional control valve for load -sensing application is studied by means of a multidimensional CFD approach.
In the analysis, an open source fluid-dynamics code is used and both cavitation and turbulence are accounted for in the modeling. A cavitation model based on a barotropic equation of state and homogeneous equilibrium assumption, including gas absorption and dissolution in the liquid medium, is adopted and coupled to a two equation turbulence approach.
Both direct and inverse flows through the metering section of the control valve are investigated, and the differences in terms of fluid - dynamics behavior are addressed In particular, the discharge coefficient, the recirculating regions, the flow acceleration angle and the pressure and velocity fields are investigated and compared.
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