Determination of explosion limits of gases and vapours

Seeing that hitherto our knowledge of the flame speeds involved in the “inflammation” and “detonation” of carbonic oxide-oxygen mixtures has been mainly confined to those of the theoretical 2CO+O 2 mixture, and that complete data over the whole “explosion range” are needed for the determination of questions relating to the combustion of carbonic oxide, we have lately carried out experiments with a view to suppyling the deficiency; and this paper embodies the results thereof. Experimental. A.-Flame Speeds in the Initial Phase of "Inflammation." It may be recalled that when a quiescent explosive mixture is ignited at the open end of a horizontal tube, the other end being closed, a slow and usually uniform flame movement is initially set up. Except in mixtures very near to one or other of the explosion limits, this initial phase is soon succeeded by an oscillatory movement during which the flame swings backwards and forwards, usually with increasing amplitude, until it is either extinguished, by swinging too far backwards into its own products of combustion, or gives rise to a must accelerated movement, may be ending up in "detonation" if sufficiently accelerated during a forward swing.

Experimental and Theoretical Methods of Lower Explosion Limit Determination in Gaseous and Liquid Fuels. A Review of the State of Knowledge

Problems of Mechatronics Armament Aviation Safety Engineering ◽

10.5604/01.3001.0009.5021 ◽

2016 ◽

Vol 7 (4) ◽

pp. 85-114 ◽

Cited By ~ 1

Author(s):

Marcin GRABARCZYK ◽

Wiesława CIESIŃSKA ◽

Rafał POROWSKI

Keyword(s):

Past Research ◽

Experimental Methods ◽

The State ◽

Liquid Fuels ◽

Theoretical Methods ◽

Explosion Limits ◽

Explosion Limit

This work is an in-depth discussion of the experimental methods of lower explosion limit (LEL) determination and estimation in gases and the vapours of liquids. The focus here includes the dependences and drawbacks of each method. The work also outlines past research and discoveries that relate to the determination of explosion limits.

Quasi-static dispersion of dusts for the determination of lower explosion limits of hybrid mixtures

Journal of Loss Prevention in the Process Industries ◽

10.1016/j.jlp.2021.104640 ◽

2021 ◽

pp. 104640

Author(s):

Zaheer Abbas ◽

Dieter Gabel ◽

Arne Krietsch ◽

Ulrich Krause

Keyword(s):

Explosion Limits ◽

Hybrid Mixtures

Determination of explosion limits – Criterion for ignition under non-atmospheric conditions

Journal of Loss Prevention in the Process Industries ◽

10.1016/j.jlp.2015.01.012 ◽

2015 ◽

Vol 36 ◽

pp. 562-568 ◽

Cited By ~ 9

Author(s):

Rico Tschirschwitz ◽

Volkmar Schröder ◽

Elisabeth Brandes ◽

Ulrich Krause

Keyword(s):

Atmospheric Conditions ◽

Explosion Limits

Determination of explosion limits of gases and vapours

10.3403/30190315 ◽

2012 ◽

Keyword(s):

Explosion Limits

Determination of explosion limits of gases and vapours

10.3403/02967727 ◽

2004 ◽

Keyword(s):

Explosion Limits

The determination of explosion limits from a unified thermal and chain theory

Symposium (International) on Combustion ◽

10.1016/s0082-0784(67)80237-6 ◽

1967 ◽

Vol 11 (1) ◽

pp. 1099-1106 ◽

Cited By ~ 9

Author(s):

C.H. Yang ◽

B.F. Gray

Keyword(s):

Explosion Limits ◽

Chain Theory

The mechanism of the hydrogen-oxygen reaction II. The reaction occurring between the second and third explosion limits

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1946.0024 ◽

1946 ◽

Vol 185 (1003) ◽

pp. 369-376 ◽

Cited By ~ 9

Keyword(s):

Preceding Paper ◽

Experimental Results ◽

New Method ◽

Chain Mechanism ◽

Experimental Conditions ◽

The Third ◽

Rate Expression ◽

Explosion Limits ◽

Explosion Limit

The equation for the rate of combination of hydrogen and oxygen, based upon the most probable chain mechanism, is very complicated and difficult to apply, without drastic approximations, to the experimental results. A new method of approach is here employed: the equation is factorized by considering first the condition for the third explosion limit (preceding paper) which allows the determination of most of the constants. With the help of these results the rate expression can be tested^ and the form of the function describing the initiating reaction examined. It is concluded that, under the experimental conditions, the chains are probably initiated by the dissociation of hydrogen: H 2 + M = 2H.