Throttle Structure Of The Flow Field Numerical Simulation Analysis

The paper was supported by Tarim oil field. The throttle valves in oil fields have many failure problems, such as valve-stem fatigue fracture, valve seat washout, poor linear adjusting, and so on. Based on the many reference books, reading and investigating in the oil field, the fluid field, the coupling of fluid and solid and the optimization of structure in the throttle were analyzed and researched systemically. Finally, it provided the theoretical supports for improving the throttle valve and enhancing the life.The theoretical analytic solution of the cone valve was derived by the applications of fluid dynamic mechanics and its related equations, and the curve of the fluid rate coefficient of the cone valve with its opening was obtained. The CFD (Computed Fluid Dynamics) finite element models of the complex throttle valves that could not be solved with analytic method were established. Based on the commercial CFD software, the preprocessing program and APDL (Ansys Parameter Design Language) of the throttle valve models were redeveloped; it is convenient to analyze the fluid fields of the complex structure throttle valves.According to the CFD models of the paper, the fields of the cone valve, multi orifice valve and wedge valve as well as the coupling of the fluid and solid were studied, which included the pressure field, velocity field and streamline charts.The structures of the wedge valve used in oil field were improved in the basis of the results of the paper, the optimal structure of the wedge valve was finally presented, which was accepted by the experts of the Tarim oil field.