scholarly journals The impact of the third O2 addition reaction network on ignition delay times of neo-pentane

2020 ◽  
Author(s):  
N. Hansen ◽  
G. Kukkadapu ◽  
B. Chen ◽  
S. Dong ◽  
H.J. Curran ◽  
...  
Keyword(s):  
Ignition Delay ◽  
Addition Reaction ◽  
Reaction Network ◽  
The Third ◽  
Ignition Delay Times ◽  
Delay Times ◽  
The Impact

scholarly journals The impact of the third O2 addition reaction network on ignition delay times of neo-pentane.

2020 ◽  
Author(s):  
Nils Hansen ◽  
G. Kukkadapu ◽  
B. Chen ◽  
S. Dong ◽  
HJ Curran ◽  
...  
Keyword(s):  
Ignition Delay ◽  
Addition Reaction ◽  
Reaction Network ◽  
The Third ◽  
Ignition Delay Times ◽  
Delay Times ◽  
The Impact

CO Time-Histories During Oxy-Methane Combustion in a CO2 Environment

2019 ◽  
Author(s):  
Owen M. Pryor ◽  
Erik Ninnemann ◽  
Subith Vasu
Keyword(s):  
Carbon Monoxide ◽  
Ignition Delay ◽  
Methane Combustion ◽  
Chemical Kinetic ◽  
Tunable Diode Laser ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Kinetic Mechanisms ◽  
Time Histories ◽  
The Impact

Abstract Carbon monoxide time-histories and ignition delay times were measured in carbon dioxide diluted methane mixtures behind reflected shockwaves. Experiments were performed around 2 atm for a temperature range between 1650–2000 K. The experiments were performed for a mixture of XCH4 = 0.5%, XO2 = 1.0%, XCO2 = 8.5%, XAr = 90.0%. The mixture was chosen to minimize energy release during the experiment and a minimum of 2 ms was recorded for all experiments. The carbon monoxide time-histories were measured using a tunable diode laser absorption spectroscopy technique and measuring the absorbance at two different wavelengths to isolate the impact of carbon monoxide on the absorbance. Carbon monoxide was measured at a wavelength of 4886.94 nm while the interfering species was measured at 4891.17 nm. Each experiment was performed twice, with the pressure and temperature before combustion being matched to within the experimental uncertainty of the two experiments. The ignition delay times were measured using OH* radical emission to determine the time-scales of the experiments. All experiments were compared to detailed chemical kinetic mechanisms that can be found in the literature. The experimental results show that the detailed mechanisms from the literature were able to accurately predict the general profile of the carbon monoxide time-histories but under-predicted maximum concentration of CO being formed at these conditions.

Ignition Characteristics of a Fischer-Tropsch Synthetic Jet Fuel

2008 ◽  
Author(s):  
P. Gokulakrishnan ◽  
M. S. Klassen ◽  
R. J. Roby
Keyword(s):  
Kinetic Model ◽  
Ignition Delay ◽  
Flow Reactor ◽  
Kinetic Mechanism ◽  
Jet Fuel ◽  
Synthetic Jet ◽  
Jet Fuels ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Ignition Characteristics

Ignition delay times of a “real” synthetic jet fuel (S8) were measured using an atmospheric pressure flow reactor facility. Experiments were performed between 900 K and 1200 K at equivalence ratios from 0.5 to 1.5. Ignition delay time measurements were also performed with JP8 fuel for comparison. Liquid fuel was prevaporized to gaseous form in a preheated nitrogen environment before mixing with air in the premixing section, located at the entrance to the test section of the flow reactor. The experimental data show shorter ignition delay times for S8 fuel than for JP8 due to the absence of aromatic components in S8 fuel. However, the ignition delay time measurements indicate higher overall activation energy for S8 fuel than for JP8. A detailed surrogate kinetic model for S8 was developed by validating against the ignition delay times obtained in the present work. The chemical composition of S8 used in the experiments consisted of 99.7 vol% paraffins of which approximately 80 vol% was iso-paraffins and 20% n-paraffins. The detailed kinetic mechanism developed in the current work included n-decane and iso-octane as the surrogate components to model ignition characteristics of synthetic jet fuels. The detailed surrogate kinetic model has approximately 700 species and 2000 reactions. This kinetic mechanism represents a five-component surrogate mixture to model generic kerosene-type jets fuels, namely, n-decane (for n-paraffins), iso-octane (for iso-paraffins), n-propylcyclohexane (for naphthenes), n-propylbenzene (for aromatics) and decene (for olefins). The sensitivity of iso-paraffins on jet fuel ignition delay times was investigated using the detailed kinetic model. The amount of iso-paraffins present in the jet fuel has little effect on the ignition delay times in the high temperature oxidation regime. However, the presence of iso-paraffins in synthetic jet fuels can increase the ignition delay times by two orders of magnitude in the negative temperature (NTC) region between 700 K and 900 K, typical gas turbine conditions. This feature can have a favorable impact on preventing flashback caused by the premature autoignition of liquid fuels in lean premixed prevaporized (LPP) combustion systems.

Application of an aerosol shock tube to the measurement of diesel ignition delay times

2009 ◽  
Vol 32 (1) ◽  
pp. 477-484 ◽  
Author(s):  
D.R. Haylett ◽  
P.P. Lappas ◽  
D.F. Davidson ◽  
R.K. Hanson
Keyword(s):  
Shock Tube ◽  
Ignition Delay ◽  
Ignition Delay Times ◽  
Delay Times

Study on the Effects of Hydrogen Addition on Ignition Delay of Surrogate Fuel for RP-3 Kerosene

2014 ◽  
Vol 1070-1072 ◽  
pp. 549-552
Author(s):  
Yu Liu ◽  
Wen Zeng ◽  
Hong An Ma ◽  
Kang Yao Deng
Keyword(s):  
Ignition Delay ◽  
Alternative Fuels ◽  
Volume Fraction ◽  
Aviation Industry ◽  
Promising Alternative ◽  
The Sustainable Development ◽  
Hydrogen Addition ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Surrogate Fuel

In order to reduce the emission and realize the sustainable development in aviation industry, looking for alternative fuel as kerosene has become more and more important. Hydrogen is regarded as one of the most promising alternative fuels. In our study RP-3 kerosene with hydrogen addition is used as the alternative kerosene. A RP-3 kerosene surrogate includes n-decane, toluene and propyl cyclohexane (volume fraction is 0.65/0.1/0.25) was chosen and the ignition delay times are calculated in CHEMKIN-PRO, it is found that hydrogen addition can shorten ignition delay.

scholarly journals Shock tube ignition delay times and methane time-histories measurements during excess CO2 diluted oxy-methane combustion

2016 ◽  
Vol 164 ◽  
pp. 152-163 ◽  
Author(s):  
Batikan Koroglu ◽  
Owen M. Pryor ◽  
Joseph Lopez ◽  
Leigh Nash ◽  
Subith S. Vasu
Keyword(s):  
Shock Tube ◽  
Ignition Delay ◽  
Methane Combustion ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Time Histories
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