Dynamic Simulation and Analysis of Gas Network in Accident Condition of Large Low Gas User

Abstract:

When blast furnace gas turbine is suddenly stopped in large iron and steel enterprises due to the fault,gas pressure along the pipeline will steep rise for mutation of extra large gas flow,and this will lead to the security incident of gas leak as a result of water sealing breakdown.This paper presents a dynamic analysis of this typical malfunction condition by using compressible fluid high-order finite volume method(FVM) and its improved algorithm.The FVM method is a higher level supplement on characteristic method and finite difference method usually applied to the dynamic analysis of gas pipeline network.And the improved algorithm of semi-implicit method for pressure-linked equation(SIMPLE) which is more stable in FVM can overcome difficulties such as the great differences in the size of diameter and gas flow mutation at the joint of pipes.