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  • 1
    Electronic Resource
    Electronic Resource
    Behavior of detonation waves at low pressures (1998)
    Springer
    Shock waves 8 (1998), S. 55-61 
    Details
    ISSN: 1432-2153
    Keywords: Key words:Detonation re-initiation, Galloping detonation, Near-limit detonation, Spontaneous ignition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics , Technology
    Notes: Abstract. With respect to stability of gaseous detonations, unsteady behavior of galloping detonations and re-initiation process of hydrogen-oxygen mixtures are studied using a detonation tube of 14 m in length and 45 mm i.d. The arrival of the shock wave and the reaction front is detected individually by a double probe combining of a pressure and an ion probe. The experimental results show that there are two different types of the re-initiation mechanism. One is essentially the same as that of deflagration to detonation transition in the sense that a shock wave generated by flame acceleration causes a local explosion. From calculated values of ignition delay behind the shock wave decoupled from the reaction front, the other is found to be closely related with spontaneous ignition. In this case, the fundamental propagation mode shows a spinning detonation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001930050098
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of reflection type on detonation initiation at shock-wave focusing (2000)
    Springer
    Shock waves 10 (2000), S. 205-215 
    Details
    ISSN: 1432-2153
    Keywords: Key words: Shock-wave focusing, Detonation initiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics , Technology
    Notes: Abstract. From practical and theoretical standpoints, the initiation of combustion in gaseous media due to the shock waves focusing process at various reflectors is a subject of much current interest. The complex gas flowfield coupled with chemical kinetics provides a wide spectrum of possible regimes of combustion, such as fast flames, deflagration, detonation etc. Shock wave reflection at concave surfaces or wedges causes converging of the flow and produces local zones with extremely high pressures and temperatures. The present work deals with the initiation of detonation due to shock waves focusing at parabolic and wedge reflectors. Particular attention has been given to the determination of the critical values of the incident shock wave (ISW) Mach number, parameters of the combustible mixture, and geometrical sizes of reflector at which different combustion regimes could be generated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001930050008
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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