Autoignition of n-decane under elevated pressure and low-to-intermediate temperature conditions

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2009.01.009· OSTI ID:21177451

Kumar, Kamal; Mittal, Gaurav; Sung, Chih-Jen ^[1]

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1. Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106 (United States)

An experimental investigation of the autoignition for various n-decane/oxidizer mixtures is conducted using a rapid compression machine, in the range of equivalence ratios of {phi}=0.5-2.2, dilution molar ratios of N{sub 2}/(O{sub 2} + N{sub 2}) = 0.79-0.95, compressed gas pressures of P{sub C}=7-30 bar, and compressed gas temperatures of T{sub C}=635-770 K. The current experiments span a temperature range not fully investigated in previous autoignition studies on n-decane. Two-stage ignition, characteristic of large hydrocarbons, is observed over the entire range of conditions investigated, as demonstrated in the plots of raw experimental pressure traces. In addition, experimental results reveal the sensitivity of the first-stage and total ignition delays to variations in fuel and oxygen mole fractions, pressure, and temperature. Predictability of two kinetic mechanisms is compared against the present data. Discrepancies are noted and discussed, which are of direct relevance for further improvement of kinetic models of n-decane at conditions of elevated pressures and low-to-intermediate temperatures. (author)

• OSTI ID: 21177451
• Journal Information: Combustion and Flame, Vol. 156, Issue 6; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DECANE
AUTOIGNITION
OXYGEN
MIXTURES
TEMPERATURE RANGE 0400-1000 K
DILUTION
FUELS
OXIDIZERS
SENSITIVITY
VARIATIONS
PRESSURE RANGE KILO PA
PRESSURE RANGE MEGA PA 01-10
TEMPERATURE DEPENDENCE
PRESSURE DEPENDENCE
TIME DELAY
Ignition delay
Two-stage ignition