Numerical Simulation of Weld Leakage Signal in High Pressure Industrial Pipelines
High-precision numerical simulation of weld leakage signal of high-pressure industrial pipelines can help both design and research of related signal sensors in the later stage,and ensure the safety of in-dustrial site.Through establishing conservation equations of mass,momentum and energy in the leakage process respectively,making use of the turbulent kinetic energy and dissipation rate and the roughness of the wall to describe wind field environment and analyze roughness of the wall,as well as describe turbulent formation process,the weld leakage model was established.In addition,the above model was coupled to FLUENT software and the simulation area was established,including reasonably dividing both line grid and surface grid,setting boundary conditions for the wind speed inlet,leakage inlet,outlet and the surface to improve rationality of the simulation results.Simulating the high-pressure industrial pipeline of natural gas shows that,when the leakage speed at leakage location becomes faster and the scope of turbulent diffusion is larger,the leakage material's concentration at the site closer to the leakage point becomes higher,and the error between simulation results and measured results is smaller.This simulation method can provide a reasonable basis for solving leakage accidents.
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