Theoretical and Experimental Investigation of Explosion Characteristics of Hydrogen Explosion in a Closed Vessel

Abstract

A simplified model that calculates the deflagration pressure–time curves of a hydrogen explosion was proposed. The deflagration parameters (pressure peak, duration, deflagration index, and impulse) of hydrogen–air mixtures with different hydrogen concentrations were experimentally investigated. The results show that the pressure curves calculated by the model are consistent with experimental data pertaining to a methane and hydrogen explosion. By comparison, the pressure peak and deflagration index are found to be influenced by the aspect ratio and surface area of vessels. The impulse and explosion times at fuel-lean hydrogen concentrations are greater than those at fuel-rich concentrations. When the hydrogen concentration is between 34 vol.% and 18 vol.%, the greatest explosion damage effect is formed by both the overpressure and the impulse, which should be considered for hydrogen explosion safety design in industrial production.

Automatic Control of Chemolithotrophic Cultivation of Cupriavidus necator: Optimization of Oxygen Supply for Enhanced Bioplastic Production

“…The gaseous substrates H 2 and O 2 form explosive oxyhydrogen mixtures within wide mixing ratios (explosion limits of 4.8 and 95.2% H 2 ) and very low minimum ignition energies (MIE ≥ 0.016 mJ). Ignition of stoichiometric H 2 and O 2 mixtures (H 2 :O 2 = 2:1) leads to maximum pressure peaks and pressure rise rates [38]. From a technological point of view, it is therefore advantageous to remain as far below the stoichiometric O 2 concentration as possible-in the best case, below the lower explosion limit of 4.8% O 2 .…”

The Effect of Explosions on the Protective Wall of a Containerized Hydrogen Fuel Cell System

“…The explosive peak overpressure increased first and then decreased with the increase of the equivalence ratio [7]. The ignition location and hydrogen-volume fraction affected the overpressure from hydrogen-premixed explosions in pipelines and vessels [8][9][10][11][12][13][14]. Additionally, some researchers have studied hydrogen explosions in confined spaces such as skid-mounted hydrogen refueling stations, garages, and rooms.…”