安全弁を有する複合管路内流体過渡現象の"SMA"法に基づくシミュレーション技術の開発(流体工学,流体機械)

概要

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A new simulation technique called the "System Modal Approximation" method (SMA method for short) for fluid transients in compound pipeline systems has been proposed by the authors, which is able to predict fast and accurately, and superiority of this technique to other existing methods has been verified. There, however, detailed considerations have been limited to the cases where either of the pressure or flow-rate is, known at every boundary. This paper presents the case study for enhancement of the analytical functions of the SMA method so as to be widely applicable to compound pipeline systems with various kinds of boundary conditions. Specifically, the calculation methods of time response of the wanted output variables at any points are newly proposed for the case whose boundary conditions are given by the time-variant non-linear relationship between pressure and flow-rate like a safety valve used for controlling fluid transients. For fluid transients produced in three kinds of compound pipeline systems with safety valve by the instantaneous valve closure, simulation results are compared with experimental results and then the usefulness of the generalized SMA method is verified.
社団法人日本機械学会の論文
2006-09-25