STUDY ON THE FLOW IN A VALVE USING STREAMLINE COORDINATES

Abstract

The requirements to improve hydraulic components for higher performances are increasingly growing. and predictions of flow fields inside components are necessary for the improvement. Among hydraulic components, poppet valves are principal ones as hydraulic control valves. The present study focuses on the flow in a poppet valve and analyzes it numerically using streamline coordinates method. In order to confirm the validity of the numerical results. the pressures acting on the valve-body surface are compared with experimental results. The analyses are conducted for laminar flow and potential flow. The comparison between the two cases suggests that the internal flow in practice. which is usually turbulent flow, can be predicted to a certain extent by these analyses.