断面積変化を伴う管路内低速流に対する圧縮性方程式を用いた数値的研究

概要

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A numerical investigation of the flows in a pipe with varied area is reported. As the governing equations, the three dimensional compressible Navier-Stokes equations written in a quasi conservation law form on general curvilinear coordinates are used. The numerical method is based on the method of lines using the rational Runge-Kutta time integration scheme combined with the central finite difference approximation for the spatial discretization. In order to comfirm the reliability of the present approach, low Reynolds number flow in a sudden pipe expansion is considered as a test problem. The computed reattachment length is in good agreement with other established results. Next calculations of the flows in a pipe with a valve are carried out. The results are compared with those of Bicen's experiments. Flow coefficient and flow patterns for each valve lift are accurately obtained.
一般社団法人日本機械学会の論文
1991-05-25