some observations on the initiation and onset of detonation by geraint thomas philosophical...
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Some observations on the initiation and onset of detonation
by Geraint Thomas
Philosophical Transactions AVolume 370(1960):715-739
February 13, 2012
©2012 by The Royal Society
Spark schlieren images of (a) a turbulent flame and (b) a detonation.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Predicted cell widths (open squares) and peak measured wavefront pressure (filled circles) versus nitrogen dilution in (a) ethylene–oxygen and (b) silane-nitrous oxide.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
(a) Smoked foil and (b) sketch of direct initiation of a hemispherical detonation.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
(a) Smoked foil of direct initiation of a cylindrical detonation.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
(a) Streak schlieren image and (b) sketch of key features observed during the direct planar shock initiation of a detonation.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Pressure records showing the temporal evolution of pressure at a number of gauge locations in a 30 m long, 0.15 m diameter pipe filled with: (a) ethylene in air and (b) hydrogen in air.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Spark schlieren images of detonation diffraction from a rectangular channel: (a) subcritical transmission, (b) critical transmission and (c) supercritical transmission.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Numerical simulations of a diffracting detonation.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Sequence of schlieren images showing the initial distortion of the flame bubble by an incident shock (mixture C2H4+3O2+4N2, incident shock Mach number 1.7, frame interval 50 μs).
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Sequence of schlieren images of shock–flame interactions for an incident shock Mach number of 2.5, mixture composition C2H4+3O2+4N2, frame interval of 10 μs.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Spark schlieren images showing the emergence of detonation in reflected shock region, gas mixture C2H4+3O2+12 Ar.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Numerical simulation output showing development of conditions conducive to onset of detonation following turbulent flame acceleration in a long pipe, open at one end.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society
Sketch illustrating different modes of high and low source energy and associated key blast or flame-acceleration processes that can lead to detonation in a reactive medium.
Geraint Thomas Phil. Trans. R. Soc. A 2012;370:715-739
©2012 by The Royal Society