Cellular pattern evolution in gaseous detonation diffraction in a 90°-branched channel

Pressure loading of detonation waves through 90-degree bend in high pressure H2–O2–N2 mixtures

“…In order to evaluate the damages, many efforts have been made to investigate the detonation wave behavior [1][2][3][4][5][6][7][8][9][10]. Especially, detonation wave propagation through various constituents of pipelines are closely related to detonation diffraction problems and has received much attention, because of its interest to researchers for both practical as well as fundamental reasons.…”

Numerical simulation of detonation failure and re-initiation in bifurcated tubes

“…The experiments were performed in a 40mm×40mm square cross section detonation tube [1,2]. The apparatus used by Wang et al includes driver sections and very long initial tube for establishing a self-sustained detonation wave, however in the numerical work a very well established and self-sustained detonation wave can be initialised in a very short distance.…”

“…Wang et al [1,2] carried out a series of experiments to study detonation propagation in bifurcated tubes filled with hydrogen-oxygen mixtures diluted with argon gas. The experiments were performed in a 40mm×40mm square cross section detonation tube [1,2].…”

“…Most studies on detonations, including their failure and re-initiation, have been carried out in 2D [1,2,[7][8][9][10] and despite that the computational times have always been high, adding the third dimension to the model would increase the number of grid points and therefore the computational cost drastically. However Houim et al [34] concluded any 3D effect should not qualitatively influence the structure of the predicted waves.…”

“…Ohyagi et al [10], studied detonation diffraction, failure and reinitiation in backwards facing step. Wang and Guo [1,2] carried out experimental and numerical studies of detonation propagation in bifurcated tubes filled with different hydrogen concentrations and pressures and demonstrated the re-initiation of detonation by the leading shock reflection in the vertical branch of the tube. Bhattacharjee et al [11], in an experimental work, studied diffraction and re-initiation of detonation around a cylindrical geometry using a high accuracy (microsecond time resolution) schlieren technique.…”