Numerical study of the transient processes in a long pipeline caused by its depressurization

Fìz.-mat. model. ìnf. tehnol. 2017, 26:100-111

Abstract

A mathematical model for mass and momentum transfer in a long gas pipeline under its depressurization has been constructed. Nonlinear problems for transient processes in the pipeline under a local depressurization have been formulated. With the use of finite difference method, the nonstationary distributions of pressure and flow rate in the pipeline have been studied for various regimes of compressors operation. The obtained results can be used for modeling gas-dynamic processes in main gas pipelines during their accidental depressurization, forecasting of possible losses, and decision making on how to cure the accident and minimize its consequences.

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