ポペット弁まわりの流れ : 流線座標を用いた圧力分布の一計算手法

抄録

The steady axisymmetric laminar flow in a poppet valve is analyzed using a conventional finite difference method (ψ-ω method). After obtaining the numerical results for stream function ψ and vorticity ω on 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 distributions are in good agreement with the experimental ones.