擬似圧縮性法による薄翼周りの非定常数値解析 (<小特集>タ-ボ機械の内部流れと定常・否定常特性)

概要

論文の詳細を見る
A numerical method using the pseudocompressibility method for solving 2-dimensional incompressible Navier-Stokes equations, which maintains high accuracy in time advancement, is described in this paper. Since the pseudocompressibility method is fundamentally applied to obtain steady solutions, subiteration in pseudotime is generally introduced for time-accurate solutions. Using subiterations, the system of equations is solved through complicated treatments in pseudotime to satisfy a divergence-free condition in physical time. In this work, a simplified method to solve unsteady flow problems is proposed by setting the subiteration in pseudotime to the physical time advancement. As a numerical example, the flow around a cylinder is calculated to verify numerical accuracy. The result shows good agreement with experimental data. Next, the flow around a 2-dimensional thin arc airfoil, which is taken from the blade of a propeller fan used in outdoor units of air-conditioners, is solved. From the results, leading edge separation and reattachment can be clearly observed.
一般社団法人日本機械学会の論文
1995-11-25