Flame front instabilities, in particular Rayleigh–Taylor instability, and rarefaction waves propagating into the enclosure after the destruction of the venting panel increase the mixing of the unburned mixture and combustion products. In partially reacted mixtures, this may create an induction time ...
Vent panelFlamePressure oscillationExperiments on explosion venting of a stoichiometric hydrogen-air mixture ignited near the top vent of a 1-m(3) rectangular vessel with a hinged aluminum vent panel were performed to investigate the effect of the panel area density on the pressure build-up and ...
The eight openings could be sealed with plastic film, perforated along the edges, or with commercial vent panels (vent area Av = 1 m2 per panel, static opening pressure Pstat = 0.10 bar). It was possible to close up to four of the eight openings. Except from test 34, the experiments ...
The vent panels were configured to release at 0.3 psig; vent panel restraint devices were not utilized. The congestion inside the rig was provided by a regular array of vertical cylinders (2-inch schedule 40 pipe and 2-inch outer diameter cylinders) giving area and volume blockage ratios (ABR...
The typical results from venting study were compared with the benchmark cases that were run in the constant volume ISO container to assess the venting efficiency. It is found that the pressure reduction can be high 97.1% with venting on the container top roof, which dramatically Declaration of ...
Fig. 15 shows selected frames from three tests: the opening of the container doors in test 09, venting through the doors in test 14, and opening of the vent panels on the roof in test 18. The vent panel opened simultaneously in most of the tests with commercial panels. The main ...
Author links open overlay panelD. Makarov, F. Verbecke, V. MolkovShow more Add to Mendeley Share Cite https://doi.org/10.1016/j.jlp.2007.04.022Get rights and content Abstract This paper presents a model and simulation results for the mitigation of a hydrogen–air deflagration by venting th...
the tests withϕin a range of 1.0–1.2 when the combustible cloud outside the venting configuration was ignited, which resulted in a pressure spike in the external pressure–time histories. The maximum overpressure outside the relief duct first increased and thereafter decreased asϕwas ...
The burn-up in the duct caused the gas mixtures to move in reverse from the duct to vessel, which consequently decreased the venting efficiency. A pressure wave caused by burn-up in the duct was observed, which resulted in a pressure peak in the external pressure–time histories after it ...
In this paper, experiments were performed to investigate the coupling effects of venting and nitrogen addition ratio (χ) on flame behavior and pressure evolution during hydrogen–air deflagration within and outside a 1-m-high vertical duct with a vent on its top. Experimental results reveal that...