ISSN:
1432-2153
Schlagwort(e):
Galloping and unstable detonation
;
Near-limit detonation
;
Doppler interferometry technique
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
,
Technik allgemein
Notizen:
Abstract Near-limit detonations are highly unstable and characterized by very large longitudinal velocity fluctuations that can range from 0.4 to 1.8 times the normal Chapman-Jouguet value. The period of the fluctuations also varies over a wide range from a few to a hundred tube diameters. In an attempt to establish a criterion for detonation limits, the velocity fluctuations of near-limit detonations are studied. A novel microwave Doppler technique based on a single coaxial mode has been developed for this purpose to give an unambiguous quasi-continuous velocity measurement of the detonation wave over the entire length of its travel. The near-limit unstable behavior in the detonable stoichiometric mixtures of hydrocarbons (C2H2, C2H4, C2H6, C3H8) with O2, air or N2O, tested in this work, have been characterized by four distinct modes of unstable behavior. This classification allows a qualitative description of the wide range of velocity fluctuations occurring near the detonation limit, including galloping waves.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01435525
Permalink
