抄録
A pressure wave propagating in a tube often changes to a shock wave because of the nonlinear effect of the fluid it is traveling through. The purpose of this study is to establish a practical analytical model to analyze this phenomenon. In this paper, the modeling of pressure wave propagating in turbulent flow and two-phase flow is proposed. Each model consists of masses, nonlinear spring, connecting dampers, and base support nonlinear dampers. To confirm the validity of the proposed model, an experiment on an air-conditioner piping system and contractions is performed and the experimental result is compared with the numerical result obtained by the concentrated mass model. All numerical computational results agree very well with the experimental results. Therefore, it is concluded that the proposed model is valid for the numerical analysis of nonlinear pressure wave problem on real piping system in single and two-phase flow.
