The Numerical Simulation of the Shock Wave of Coal Gas Explosions in Gas Pipe*

3rd International Conference on Energy Equipment Science and Engineering

Chen, Zhenxing^1,2 ; Hou, Kepeng^1 ; Chen, Longwei^3

Faculty of Land Source Engineering, Kunming University of Science and Technology, Kunming

650092, China^1

Information School, Yunnan University of Finance and Economics, Kunming

650221, China^2

Statistical and Mathematical College, Yunnan University of Finance and Economics, Kunming

650221, China^3

关键词: Conservation equations;    Hydrodynamic equations;    Initial development;    Material transport;    Pipeline structure;    Safety precautions;    Three dimensions;    Volume of fluids;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012115/pdf
DOI  :  10.1088/1755-1315/128/1/012115

来源: IOP

【 摘 要 】

For the problem of large deformation and vortex, the method of Euler and Lagrange has both advantage and disadvantage. In this paper we adopt special fuzzy interface method(volume of fluid). Gas satisfies the conditions of conservation equations of mass, momentum, and energy. Based on explosion and three-dimension fluid dynamics theory, using unsteady, compressible, inviscid hydrodynamic equations and state equations, this paper considers pressure gradient's effects to velocity, mass and energy in Lagrange steps by the finite difference method. To minimize transport errors of material, energy and volume in Finite Difference mesh, it also considers material transport in Euler steps. Programmed with Fortran PowerStation 4.0 and visualized with the software designed independently, we design the numerical simulation of gas explosion with specific pipeline structure, check the key points of the pressure change in the flow field, reproduce the gas explosion in pipeline of shock wave propagation, from the initial development, flame and accelerate the process of shock wave. This offers beneficial reference and experience to coal gas explosion accidents or safety precautions.