An experimental and kinetic modeling study on the low-temperature oxidation, ignition delay time, and laminar flame speed of a surrogate fuel for RP-3 kerosene

2022 ◽  
Vol 237 ◽  
pp. 111821
Author(s):  
Jing Liu ◽  
Erjiang Hu ◽  
Geyuan Yin ◽  
Zuohua Huang ◽  
Wen Zeng
Keyword(s):  
Low Temperature ◽  
Kinetic Modeling ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Laminar Flame Speed ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Surrogate Fuel

scholarly journals An experimental and chemical kinetic modeling study of 1,3-butadiene combustion: Ignition delay time and laminar flame speed measurements

2018 ◽  
Vol 197 ◽  
pp. 423-438 ◽  
Author(s):  
Chong-Wen Zhou ◽  
Yang Li ◽  
Ultan Burke ◽  
Colin Banyon ◽  
Kieran P. Somers ◽  
...  
Keyword(s):  
Kinetic Modeling ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Chemical Kinetic ◽  
Flame Speed ◽  
Laminar Flame Speed ◽  
Modeling Study

Ignition delay time and laminar flame speed measurements of ammonia blended with dimethyl ether: A promising low carbon fuel blend

2021 ◽  
Author(s):  
Gani Issayev ◽  
Binod Raj Giri ◽  
Ayman M. Elbaz ◽  
Krishna P. Shrestha ◽  
Fabian Mauss ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Flame Speed ◽  
Laminar Flame Speed ◽  
Low Carbon ◽  
Fuel Blend

Ignition delay time and laminar flame speed measurements of mixtures containing diisopropyl-methylphosphonate (DIMP)

2020 ◽  
Vol 215 ◽  
pp. 66-77
Author(s):  
Olivier Mathieu ◽  
Travis Sikes ◽  
Waruna D. Kulatilaka ◽  
Eric L. Petersen
Keyword(s):  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Flame Speed ◽  
Laminar Flame Speed

Experimental study of the effect of CF3I addition on the ignition delay time and laminar flame speed of methane, ethylene, and propane

2015 ◽  
Vol 35 (3) ◽  
pp. 2731-2739 ◽  
Author(s):  
O. Mathieu ◽  
J. Goulier ◽  
F. Gourmel ◽  
M.S. Mannan ◽  
N. Chaumeix ◽  
...  
Keyword(s):  
Experimental Study ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Flame Speed ◽  
Laminar Flame Speed

Numerical Study on the Effect of Real Syngas Compositions on Ignition Delay Times and Laminar Flame Speeds at Gas Turbine Conditions

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Olivier Mathieu ◽  
Eric L. Petersen ◽  
Alexander Heufer ◽  
Nicola Donohoe ◽  
Wayne Metcalfe ◽  
...  
Keyword(s):  
Ignition Delay ◽  
Delay Time ◽  
Gas Turbines ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Flame Speed ◽  
Operating Conditions ◽  
Laminar Flame Speed ◽  
Ignition Delay Times ◽  
Delay Times

Depending on the feedstock and the production method, the composition of syngas can include (in addition to H2 and CO) small hydrocarbons, diluents (CO2, water, and N2), and impurities (H2S, NH3, NOx, etc.). Despite this fact, most of the studies on syngas combustion do not include hydrocarbons or impurities and in some cases not even diluents in the fuel mixture composition. Hence, studies with realistic syngas composition are necessary to help in designing gas turbines. The aim of this work was to investigate numerically the effect of the variation in the syngas composition on some fundamental combustion properties of premixed systems such as laminar flame speed and ignition delay time at realistic engine operating conditions. Several pressures, temperatures, and equivalence ratios were investigated for the ignition delay times, namely 1, 10, and 35 atm, 900–1400 K, and ϕ = 0.5 and 1.0. For laminar flame speed, temperatures of 300 and 500 K were studied at pressures of 1 atm and 15 atm. Results showed that the addition of hydrocarbons generally reduces the reactivity of the mixture (longer ignition delay time, slower flame speed) due to chemical kinetic effects. The amplitude of this effect is, however, dependent on the nature and concentration of the hydrocarbon as well as the initial condition (pressure, temperature, and equivalence ratio).

scholarly journals Research on Combustion Characteristics of Air–Light Hydrocarbon Mixing Gas

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 730 ◽  
Author(s):  
Zhiqun Meng ◽  
Jinggang Wang ◽  
Chuchao Xiong ◽  
Jiawen Qi ◽  
Liquan Hou
Keyword(s):  
Residence Time ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Combustion Characteristics ◽  
Light Hydrocarbon ◽  
Laminar Flame Speed ◽  
Emission Index ◽  
Co Emission

Air–light hydrocarbon mixing gas is a new type of city gas which is composed of light hydrocarbon with the main component of n-pentane and air mixed in a certain proportion. To explore the dominant reactions for CO production of air–light hydrocarbon mixing gas with different mixing degrees at the critical equivalence ratios, a computational study was conducted on the combustion characteristics, including the ignition delay time, laminar flame speed, extinction residence time, and emission of air–light hydrocarbon mixing gas at atmospheric pressure and room temperature in the present study. The calculated results indicate that the ignition delay time of air–light hydrocarbon mixing gas at temperatures of 1000–1118 K is greater than that of n-pentane, while the opposite at temperatures of 1118–1600 K. From the study of the laminar flame speed and ignition delay time, it was found that the essence of air–light hydrocarbon mixing gas is that its attribute parameter is determined by the ratio of n-pentane to the total amount of air at the moment of combustion. The changes in the extinction residence time and the CO emission index of air–light hydrocarbon mixing gas are not synchronized, that is the CO emission index is not necessarily small for air–light hydrocarbon mixing gas with excellent extinction residence time. CO sensitivity analysis and CO rate of production identified key species and reactions that are primarily responsible for CO formation and annihilation. The mixing degree plays a key role in the CO emission index of air–light hydrocarbon mixing gas, which has a constructive opinion on the future experiment and application of air–light hydrocarbon mixing gas.

scholarly journals Investigation of the Effect of Hydrogen and Methane on Combustion of Multicomponent Syngas Mixtures using a Constructed Reduced Chemical Kinetics Mechanism

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2442 ◽  
Author(s):  
Nearchos Stylianidis ◽  
Ulugbek Azimov ◽  
Martin Birkett
Keyword(s):  
Chemical Kinetics ◽  
Ignition Delay ◽  
Delay Time ◽  
Ignition Delay Time ◽  
High Pressures ◽  
Laminar Flame ◽  
Flame Speed ◽  
Laminar Flame Speed ◽  
The Difference ◽  
Rich Mixtures

This study investigated the effects of H2 and CH4 concentrations on the ignition delay time and laminar flame speed during the combustion of CH4/H2 and multicomponent syngas mixtures using a novel constructed reduced syngas chemical kinetics mechanism. The results were compared with experiments and GRI Mech 3.0 mechanism. It was found that mixture reactivity decreases and increases when higher concentrations of CH4 and H2 were used, respectively. With higher H2 concentration in the mixture, the formation of OH is faster, leading to higher laminar flame speed and shorter ignition delay time. CH4 and H2 concentrations were calculated at different pressures and equivalence ratios, showing that at high pressures CH4 is consumed slower, and, at different equivalence ratios CH4 reacts at different temperatures. In the presence of H2, CH4 was consumed faster. In the conducted two-stage sensitivity analysis, the first analysis showed that H2/CH4/CO mixture combustion is driven by H2-based reactions related to the consumption/formation of OH and CH4 recombination reactions are responsible for CH4 oxidation. The second analysis showed that similar CH4-based and H2 -based reactions were sensitive in both, methane- and hydrogen-rich H2/CH4 mixtures. The difference was observed for reactions CH2O + OH = HCO + H2O and CH4 + HO2 = CH3 + H2O2, which were found to be important for CH4-rich mixtures, while reactions OH + HO2 = H2O + O2 and HO2 + H = OH + OH were found to be important for H2-rich mixtures.

The Effect of Impurities on Ignition Delay Times and Laminar Flame Speeds of Syngas Mixtures at Gas Turbine Conditions

2014 ◽  
Author(s):  
Olivier Mathieu ◽  
Joshua W. Hargis ◽  
Eric L. Petersen ◽  
John Bugler ◽  
Henry J. Curran ◽  
...  
Keyword(s):  
Ignition Delay ◽  
Delay Time ◽  
Gas Turbines ◽  
Ignition Delay Time ◽  
Laminar Flame ◽  
Flame Speed ◽  
Operating Conditions ◽  
Laminar Flame Speed ◽  
Ignition Delay Times ◽  
Combustion Properties

In addition to mostly H2 and CO, syngas also contains reasonable amounts of light hydrocarbons, CO2, H2O, N2, and Ar. Impurities such as NH3, HCN, COS, H2S, and NOx (NO, NO2, N2O) are also commonly found in syngas. The presence of these impurities, even in very low concentrations, can induce some large changes in combustion properties. Although they introduce potential design and operational issues for gas turbines, these changes in combustion properties due to the presence of impurities are still not well characterized. The aim of this work was therefore to investigate numerically the effect of the presence of impurities in realistic syngas compositions on some fundamental combustion properties of premixed systems such as laminar flame speed and ignition delay time, at realistic engine operating conditions. To perform this study, a state-of-the-art C0–C3 detailed kinetics mechanism was used. This mechanism was combined with recent, optimized sub-mechanisms for impurities which can impact the combustion properties of the syngas such as nitrogenous species (i.e., N2O, NO2, NH3, and HCN) and sulfur-based species such as H2S, SO2 and COS. Several temperatures, pressures, and equivalence ratios were investigated. The results of this study showed that the addition of some impurities modifies notably the reactivity of the mixture. The ignition delay time is decreased by the addition of NO2 and H2S at the temperatures and pressures for which the HO2 radical dominates the H2 combustion. However, while NO2 has no effect when OH is dominating, H2S increases the ignition delay time in such conditions for pressures above 1 atm. The amplitude of these effects is however dependent on the impurity concentration. Laminar flame speeds are not sensitive to NO2 addition but they are to NH3 and HCN, inducing a small reduction of the laminar flame speed at fuel rich conditions. H2S exhibits some inhibiting effects on the laminar flame speed but only for high concentrations. The inhibiting effects of NH3, HCN, and H2S are due to the OH radical consumption by these impurities, leading to the formation of radicals that are less reactive.

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