Developing the model of non-stationary processes of motion and discharge of single- and two-phase medium at emergency releases from pipelines

International Workshop on Physical and Chemical Processes in Atomic Systems

Sumskoi, S.I.^1 ; Sofin, A.S.^2 ; Lisanov, M.V.^2

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoye shosse 31, Moscow

115409, Russia^1

CJSC Scientific Technical Center of Industrial Safety Problems Research, Perevedenovsky Pereulok 13, Moscow

105082, Russia^2

关键词: Emergency situation;    Gas dynamic process;    Multidimensional effects;    Non-equilibrium process;    Nonstationary process;    One-dimensional approach;    Pipe-line systems;    System of equations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/751/1/012025/pdf
DOI  :  10.1088/1742-6596/751/1/012025

来源: IOP

【 摘 要 】

The system of equations describing gas dynamic processes with extremal gradients of velocity, temperature, concentration and pressure in pipeline systems is presented. The proposed model most completely takes into account the actual processes in pipeline systems transporting various media. The model is formulated in one-dimensional approach. However it takes into account the multidimensional effects affecting the flow, including the development of non-equilibrium processes. These multidimensional effects are due to the branching pipeline, diameter change, valve shut down. This model can be used for modeling an emergency situation, that includes single- and two-phase mediums release.