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A Mathematical Model for Simulation of Flow Rate and Chamber Pressures in Spool Valves.
- Source :
-
Journal of Dynamic Systems, Measurement, & Control . Feb2019, Vol. 141 Issue 2, p1-9. 9p. - Publication Year :
- 2019
-
Abstract
- In this paper, a mathematical model to simulate the pressure and flow rate characteristics of a spool valve is derived. To improve the simulation accuracy, the discharge coefficient through the spool valve ports is assumed to be a function of both the Reynolds number and the orifice geometry rather than treating it as a constant. Parameters of the model are determined using the data obtained by computational fluid dynamics (CFD) analyses conducted on two-dimensional axisymmetric domains using ANSYS Fluent 15® commercial software. For turbulence modeling, shear stress transport (SST) k-ω model is preferred after a comparison of performance with the other available turbulence model options. The resulting model provides consistent pressure and flow rate estimations with CFD analyses and a smooth transition between different geometrical conditions. The ultimate aim of this study is to fulfill the need for a model to precisely determine the geometrical tolerances of spool valve components for optimum performance. Estimations of the developed model is compared with the experimental data of a spool valve, and the model is proved to be able to accurately estimate the maximum leakage flow rate, the pressure sensitivity, and the shapes of leakage flow/load pressure curves. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MATHEMATICAL models
*VALVES
*FLUID flow
Subjects
Details
- Language :
- English
- ISSN :
- 00220434
- Volume :
- 141
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Dynamic Systems, Measurement, & Control
- Publication Type :
- Academic Journal
- Accession number :
- 134438561
- Full Text :
- https://doi.org/10.1115/1.4041300