Detonation waves in plain gas and gas trapped in a light water based foam, were compared to find out if there is a connection between the detonation velocity achieved in the foam, to the size of the foam bubbles, and if such a connection can give an indication of the size of the ...
Open cell foamDetonation shock dynamicsStress-strain responseWe report results of Eulerian hydrodynamic simulations of detonation shock waves propagating through open cell foams constructed of aluminum, polymethylmethacrylate, and lead at approximately 20 % relative density in nitromethane. By varying pore ...
The soot pattern indicates that the onset of detonation is achieved via the interaction between shock waves and wall, and fast turbulence mixing. For the case of the 10-mm foam plate, the single-headed mode can be observed. Generally, the re-initiation distance increases with the cell size....
Based on experimental data, we show that pulsating precursors, which are induced by gasification of the polystyrene foam, are present in the explosive mixture in front of the detonation wave. Detonation itself takes place in the gas-phase products of thermal decomposition of the mixture components ...
Advanced numerical methods are essential for enhancing the understanding of the flow field structure and combustion mechanism of detonation. In this study, a density-based compressible reactive flow solver called CDSFoam is developed for simulating gas-droplet two-phase detonation combustion based on ...
The simulation of LX-17 detonation using the ERI developed code was carried out. The simulated data was in good agreement with experiment's data. This implies that the code is applicable for the investigation of high explosive detonation. In the future work, the code is revised to ensure the...
The two-dimensional compressible Reynolds Averaged Navier Stokes equation is solved using open source deflagration to detonation solver 'ddtFoam' at OpenFoam platform. The obstacles here are the obstructions in the flow for turbulence enhancement which results in earlier transition of DDT. Seven ...
Inert material for controlling detonation wave direction consists of foam glass, sinter glass, light ceramic or organic rigid foam. Foam glass esp. consists of B silicate glass and can have density down to 0.125 g/cc. Sinter glass has density at least 1 g/cc and heat expansion coefft. 0-...
However, simulation of combustion, such as what occurs in detonation will require far more complex chemistry and high temperature kinetics models. In this paper we simulate premixed hydrogen combsution importing the entire reaction mechanisms from Cantera in OpenFOAM. We compare Brayton cycle and ...
For the numerical model, two different solution approaches, i.e., the pressure-based and density-based methods, have been adopted using the OpenFOAM~? CFD toolbox. A reactive density-based solver using the Harten-Lax-van Leer-contact (HLLC) scheme has been developed within the frame of ...