Gaseous hydrocarbon-air detonations

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6773079

Tieszen, S R; Stamps, D W; Westbrook, C K; Pitz, W J

Detonation cell width measurements are made on mixtures of air and methane, ethane, dimethyl-ether, nitroethane, ethylene, acetylene, propane, 1,2-epoxypropane, n-hexane, 1-nitrohexane, mixed primary hexylnitrate, n-octane, 2,2,4-trimethylpentane, cyclooctane, 1-octene, cis-cyclooctene, 1-7-octadiene, 1-octyne, n-decane, 1,2-epoxydecane, pentyl-ether, and JP4. There is a slight decrease in detonation cell width that is within the uncertainty of the data for stoichiometric alkanes, alkenes, and alkynes with increasing temperature between 25 and 100/degree/C. Also there appears to be no effect of molecular weight from ethane to decane, on detonation cell width for stoichiometric alkanes. Molecular structure is found to affect detonability for C/sub 8/ hydrocarbons, where the saturated ring structure is more sensitive than the straight-chain alkane. Unsaturated alkenes and alkynes are more sensitive to detonation than saturated alkanes. However, the degree of sensitization decreases with increasing molecular weight. Addition of functional groups such as nitro, nitrate, epoxy, and ethers are found to significantly reduce the detonation cell width from the parent n-alkane. Nitrated n-alkanes can be more sensitive than hydrogen-air mixtures. The increase in sensitivity of epoxy groups appears to be related to the oxygen to carbon ratio of the molecule. Good results are obtained between the data and predictions from a ZND model with detailed chemical kinetics. 46 refs., 8 figs., 4 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6773079
• Report Number(s): SAND-88-1925C; CONF-8810103-1; ON: DE89001042
• Resource Relation: Conference: Fall meeting of the Western State Section of The Combustion Institute, Laguna Beach, CA, USA, 17 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALKANES
DETONATIONS
ALKENES
ALKYNES
AIR
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
EPOXIDES
ETHERS
HYDROCARBONS
MIXTURES
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
NITRATES
NITROGEN COMPOUNDS
STOICHIOMETRY
TEMPERATURE EFFECTS
DISPERSIONS
FLUIDS
GASES
KINETICS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
400201 - Chemical & Physicochemical Properties