Flow in a Poppet Valve : Computation of Pressure Distribution using a Streamline Coordinate System

抄録

The steady axisymmetric laminar flow in a poppet valve is analyzed by means of a conventional finite difference method (ψ-ω method) . After obtaining the numerical results for stream functionψ and vorticity ω in the cylindrical coordinate system, a streamline coordinate system (φ, ψ) is applied to compute pressure distributions, because good pressure distributions cannot be obtained using the cylindrical coordinates. The pressure on the valve body surface is experimentally measured. The numerical results for pressure are in good agreement with the experimental ones.