高次精度三次元数値計算によるエンジン吸気行程過渡流動の解析

概要

論文の詳細を見る
A three-dimensional flow in the intake process of a reciprocal engine is calculated numerically under such complicated boundary conditions as moving valves and arbitary intake-port and combustion chamber configurations. A finite difference method using a third-order upwind scheme for convective terms is applied to solve incompressible Navier-Stokes equations. This model enables us to simulate the occurence of small vortices near the valve and valve seat or caused by curvature of the intake port, as well as the influence on flow in a cylinder of the vortices. The difference in flow pattern between single and double intake valves is compared as an application of this model. LDV measurements at 126 points inside an engine cylinder at an engine speed of 1 400 rpm are also performed in this study to evaluate the calculation results. It is clarified that the calculation flow field agrees fairly well with the measured results.
一般社団法人日本機械学会の論文
1989-07-25