Modelling the mitigation of lean hydrogen deflagrations in a vented cylindrical rig with water fog

Suppression of hydrogen–oxygen–nitrogen explosions by fine water mist: Part 2. Mitigation of vented deflagrations

“…12 e Suggested limits of flammability with varying water mist density (based on results with a 9 J exploding wire igniter in the test apparatus). i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 7 ( 2 0 1 2 ) 1 9 2 5 8 e1 9 2 6 7 It is finally worth noting that this study (along with part 1 [1]) forms part of a larger programme including the development of computer models [5]. The work is currently being extended to investigate the effectiveness of water mist with alkali metal additives.…”

“…It was also intended that the data obtained in the investigation would be of use in subsequent, separate modelling studies involving specialist explosion software such as FLACS. 1 The results of these studies have recently been reported [5].…”

“…In the majority of experiments with vented deflagrations, 0.015 mm thick foil was used but some tests were carried out employing thicker 0.025 mm foil so that the influence of different static vent rupture pressures could be determined. This was a convenient means of generating data for comparison with computer modelling [5].…”

Modeling pressure loads during a premixed hydrogen combustion in the presence of water spray

“…In [3], [4] a rather thorough analysis of main factors influencing flame evolution during spraying is presented. Early small scale experiments [5] as well as recent small and medium scale experiments using hydrogen [6], [7], [8], [9] have revealed that sprays containing small-size droplets, of the order of O(10 µm) can be effective against premixed combustion.…”

The influence of N2/CO2 blends on the explosion characteristics of stoichiometric methane–air mixture

“…Among them, adding inhibitors into the combustible mixtures is an effective way to suppress explosions. These inhibitors can be water mists and sprays , solid particles , and inert gases . The suppression mechanisms are thermal cooling, shock‐flame breaking, or specific heat changing by these nonreactive medium.…”