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Numerical analysis of hydraulic oil flow through channels and chambers of the cylindrical piston valve

Recent developments in Computational fluid dynamics (CFD) have enabled accurate and reliable calculations of pressure, velocity and temperature field, during the fluid through different technical parts and systems. This paper presents the application of numerical analysis based on the FiniteVolume Method (FVM) for the analysis of hydraulic oil stationary flow through the channels and chambers of the cylindrical piston valve. By means of the software COMET and numerical simulation, Dp-Q characteristic for 3D model of the distributing valve with cylindrical piston were defined and compared to experimentally obtained characteristics. The applied mathematical model is established on the basic fluid mechanics equations given in integral form. The equations of the mass, momentum, energy and space conservation that define mathematical model were closed with appropriate constitutive relations. Basic equations were discretized and transformed into the subsystem of nonlinear algebraic relations with unknown variables ac components of velocity, pressure, temperature, kinetic energy of turbulence and its dissipation rate. Due to nonlinearity, these subsystems were solved by iterative method based on the algorithm with segregated solution strategy. Verification of the application of numerical analysis, based on FVM for the analysis of hydraulic oil stationary flow through 3D model of channels and chambers of distributing cylindrical piston valve, was performed by comparing the numerical and experimental results.

numerical analysis; numerical simulation; finite volume elements; distributing cylindrical piston valve; hydraulic oil

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