Effect of transverse jet position on flame propagation regime
Wandong Zhao, Jianhan Liang, Ralf Deiterding, Xiaodong Cai, Xinxin Wang
Abstract
We studied the mechanisms of flame acceleration (FA) and deflagration to detonation transition (DDT) triggered by a combination of solid and jet obstacles. The Navier–Stokes equations with a detailed hydrogen–air kinetics model were utilized. Vast Kelvin–Helmholtz instabilities generate intensive turbulence–flame interactions, leading to an increase in surface area and high propagation velocity. The jet position has a significant effect on the FA and DDT. A choking flame and detonation flame are obtained by the transverse jet with different positions and mixing times even though in a lower blockage ratio.
Topics & Concepts
PhysicsDetonationMechanicsTransverse planeJet (fluid)TurbulenceDeflagration to detonation transitionMixing (physics)AccelerationDeflagrationThermodynamicsClassical mechanicsExplosive materialChemistryQuantum mechanicsStructural engineeringOrganic chemistryEngineeringCombustion and Detonation ProcessesFire dynamics and safety researchEnergetic Materials and Combustion