Impacts of Rectangular Obstacle Lengths on Premixed Methane–Air Flame Propagation in a Closed Tube
Gang Luo, J.-Q. Tu, Yunlou Qian, Kaiqiang Jin, Tianqi Ye, Yiping Bai, Shuai Gao
Abstract
To investigate the mechanism of the flame–vortex interaction induced by an obstacle, a numerical research of premixed methane–air flame dynamics in an obstructed chamber is described. Numerical simulations are performed with the OpenFOAM open-source CFD code. The simulation images show that the flame propagation process can be divided into four typical stages. A series of instabilities are captured in the simulation during flame propagation. More importantly, the numerical results demonstrate that a longer obstacle allows a sufficient accelerating time, which can give rise to a higher explosion overpressure and faster flame tip speed.
Topics & Concepts
OverpressureMechanicsObstacleComputational fluid dynamicsPremixed flameComputer simulationMethaneVortexMaterials scienceTube (container)Diffusion flameFlame speedPhysicsChemistryThermodynamicsComposite materialCombustionCombustorLawOrganic chemistryPolitical scienceCombustion and Detonation ProcessesCombustion and flame dynamicsFire dynamics and safety research