Deflagration to detonation transition in mixtures of alkane LNG/LPG constituents with O/sub 2//N/sub 2/

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(88)90097-1· OSTI ID:7200346

Lindstedt, R P; Michels, H J

Deflagration to detonation transitions (DDT) of methane, methane/ethane, ethane, propane, and butane in mixtures with increasing dilution of nitrogen have been studied in a smooth 2'' id detonation tube with a length/diameter ratio of 220. The results obtained demonstrate the presence of two regimes of DDT depending on the reactivity of the mixture. The first regime displays rapid acceleration to a stable detonation, while the second regime contains a quasistable, strong deflagration of rapidly increasing duration with decreasing mixture reactivity. It is established that the order of DDT under the conditions employed follows the order of autoignition temperatures for the fuels considered. The conditional use of transition parameters for estimates of relative detonabilities based on a qualitative similarity between induction times and times to transition is demonstrated to hold only for the first transition regime.

• Research Organization: Dept. of Chemical Engineering and Chemical Technology, Imperial College, London (GB)
• OSTI ID: 7200346
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 72:1; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACTIVATION ENERGY
ALKANES
BUTANE
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DETONATIONS
ELEMENTS
ENERGY
ETHANE
HYDROCARBONS
KINETICS
METHANE
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
PROPANE
REACTION KINETICS