In this study, homogeneous hydrogen-air mixture is numerically investigated in a tube of 1 m length and 50 mm diameter with obstacles by solving two-dimensional compressible Reynolds averaged Navier–Stokes equation with reaction modelling of hydrogen-air combustion, using open-source deflagration to detonation solver ‘ddtFoam’ at OpenFoam platform. Deflagration to detonation transition is observed in the tube at various time and locations depending on obstacle configuration namely the blockage ratio and pitch. Turbulence offered by obstacles result in faster transition from deflagration to detonation. Suitable boundary conditions are assigned, and 2D and axisymmetric numerical simulations are performed and compared. Pressure, temperature, and flame tip location vs. time plots are plotted, and it has been observed that in 2D simulations, lower pitch of the obstacle system results in earlier deflagration to detonation transition, and detonation occurs earlier in axisymmetric simulations than 2D simulations for same configuration of blockages.
Numerical Study of Deflagration to Detonation Transition in 2D and Axisymmetric Detonation Tube with Obstacles Using OpenFOAM
Lect.Notes Mechanical Engineering
National Conference on IC Engines and Combustion ; 2019 ; Kurukshetra, India November 01, 2019 - November 04, 2019
2020-08-19
14 pages
Article/Chapter (Book)
Electronic Resource
English