Ignition delay times in ethylene oxide-oxygen-argon mixtures behind a reflected shock

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(93)90160-5· OSTI ID:6439773

Yoon, Hyun-mo; Yeo, Hwan-gon; Yun, Suck Sung; Kim, Chang-sik; Kang, Jun-Gill ^[1]

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1. Chungnam National Univ., Daejeon (Korea, Republic of)

A great deal of work has been conducted on the ignition delay times of fuel-oxygen-argon mixtures in shock tubes to investigate the complex combustion processes. Recently, the authors have studied the ignition behavior of nitromethane-oxygen-argon mixtures in the region behind a reflected shock wave. It was found that increasing concentrations of CH[sub 3]NO[sub 2] inhibits detonation and that the role of O[sub 2] as a detonation promoter is reduced in the reaction of the nitromethane mixture. This result could be due to the substituted NO[sub 2] group. The present study was undertaken to investigate the kinetics of the ethylene oxide combustion process. A single-pulse shock tube with 24.3 mm i.d. was used in this study. The shock speed was measured with two Kistler 6031 pressure transducers: one was mounted at a distance of 0.233 m from the other which was flush with the inside wall of the end plate. A detailed description of the experimental apparatus has been presented in previous work. The test gases were prepared by mixing vaporized ethylene oxide with oxygen and argon manometrically and the mixture was stored in a Pyrex flask connected t the driven section of shock tube. Reflected shock temperatures were computed from the measured incident shock speed and the other input data making the assumption that the composition of the mixture is fixed in any thermodynamic process by the initial composition to be shocked. The program, originally written by Gordon and McBride, has been modified to run on an IBM/PC. Thermodynamic properties of ethylene oxide, oxygen and argon were computed from polynomial fits to JANAF thermodynamical data.

• OSTI ID: 6439773
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 92:4; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100* -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
ARGON
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL EXPLOSIVES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
COMPUTER CALCULATIONS
DATA
DETONATIONS
DISPERSIONS
ELEMENTS
EXPERIMENTAL DATA
EXPLOSIVES
FLUIDS
GASES
IGNITION
INFORMATION
KINETICS
MIXTURES
NITRO COMPOUNDS
NITROMETHANE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE GASES
REACTION KINETICS
SHOCK TUBES
THERMODYNAMIC PROPERTIES
TIME DELAY