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Journal articles on the topic 'Natural gas-oxidizer; Laminar burning velocity'

Author: Grafiati

Published: 6 September 2023

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1

Han, Zhiqiang, Zhennan Zhu, Peng Wang, Kun Liang, Zinong Zuo, and Dongjian Zeng. "The Effect of Initial Conditions on the Laminar Burning Characteristics of Natural Gas Diluted by CO2." Energies 12, no. 15 (2019): 2892. http://dx.doi.org/10.3390/en12152892.

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The initial conditions such as temperature, pressure and dilution rate can have an effect on the laminar burning velocity of natural gas. It is acknowledged that there is an equivalent effect on the laminar burning velocity between any two initial conditions. The effects of initial temperatures (323 K–423 K), initial pressures (0.1 MPa–0.3 MPa) and dilution rate (0–16%, CO2 as diluent gas) on the laminar burning velocity and the flame instability were investigated at a series of equivalence ratios (0.7–1.2) in a constant volume chamber. A chemical kinetic simulation was also conducted to calcu

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2

Wu, Xueshun, Peng Wang, Zhennan Zhu, Yunshou Qian, Wenbin Yu, and Zhiqiang Han. "The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2." Energies 14, no. 4 (2021): 809. http://dx.doi.org/10.3390/en14040809.

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Initial temperature has a promoting effect on laminar burning velocity, while initial pressure and dilution rate have an inhibitory effect on laminar burning velocity. Equal laminar burning velocities can be obtained by initial condition coupling with different temperatures, pressures and dilution rates. This paper analysed the equivalent distribution pattern of laminar burning velocity and the variation pattern of an equal weight curve using the coupling effect of the initial pressure (0.1–0.3 MPa), initial temperature (323–423 K) and dilution rate (0–16%). The results show that, as the initi

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3

Jones, A. L., and R. L. Evans. "Comparison of Burning Rates in a Natural-Gas-Fueled Spark Ignition Engine." Journal of Engineering for Gas Turbines and Power 107, no. 4 (1985): 908–13. http://dx.doi.org/10.1115/1.3239835.

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A series of tests was conducted on a Toyota, four-cylinder, spark ignition engine which was modified to run on either gasoline or natural gas. The aim of the experiment was to investigate the performance and combustion behavior of natural gas, with particular emphasis on its low burning velocity. A pressure transducer installed in the cylinder head was used to obtain pressure versus crank angle curves from which mass burn rates and burning velocities were calculated, using a heat release analysis program. Results indicate that the low laminar burning velocity of natural gas extends its ignitio

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4

Cardona Vargas, Arley, Carlos E. Arrieta, Hernando Alexander Yepes Tumay, Camilo Echeverri-Uribe, and Andrés Amell. "Determination of laminar burning velocity of methane/air flames in sub atmospheric environments." EUREKA: Physics and Engineering, no. 4 (July 23, 2021): 50–62. http://dx.doi.org/10.21303/2461-4262.2021.001775.

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The global energy demand enhances the environmental and operational benefits of natural gas as an energy alternative, due to its composition, mainly methane (CH4), it has low polluting emissions and benefits in energy and combustion systems. In the present work, the laminar burning velocity of methane was determined numerically and experimentally at two pressure conditions, 0.85 atm and 0.98 atm, corresponding to the city of Medellín and Caucasia, respectively, located in Colombia. The environmental conditions were 0.85 atm, 0.98 atm, and 295±1 K. The simulations and experimental measurements

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5

Zhang, Ziyue, Runfan Zhu, Yanqun Zhu, Wubin Weng, Yong He, and Zhihua Wang. "Experimental and Kinetic Study on Laminar Burning Velocities of High Ratio Hydrogen Addition to CH4+O2+N2 and NG+O2+N2 Flames." Energies 16, no. 14 (2023): 5265. http://dx.doi.org/10.3390/en16145265.

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In 2020, energy-related CO2 emissions reached 31.5 Gt, leading to an unprecedented atmospheric CO2 level of 412.5 ppm. Hydrogen blending in natural gas (NG) is a solution for maximizing clean energy utilization and enabling long-distance H2 transport through pipelines. However, insufficient comprehension concerning the combustion characteristics of NG, specifically when blended with a high proportion of hydrogen up to 80%, particularly with minority species, persists. Utilizing the heat flux method at room temperature and 1 atm, this experiment investigated the laminar burning velocities of CH

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6

Sanmiguel, Javier E., S. A. (Raj) Mehta, and R. Gordon Moore. "An Experimental Study of Controlled Gas-Phase Combustion in Porous Media for Enhanced Recovery of Oil and Gas." Journal of Energy Resources Technology 125, no. 1 (2003): 64–71. http://dx.doi.org/10.1115/1.1510522.

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This paper describes an experimental study aimed at establishing fundamental information on the various processes and relevant controlling mechanisms associated with gas-phase combustion in porous media, especially at elevated pressures. A novel apparatus has been designed, constructed and commissioned in order to evaluate the effects of controlling parameters such as operating pressure, gas flow rate, type and size of porous media, and equivalence ratio on combustion characteristics. The results of this study, concerned with lean mixtures of natural gas and air and operational pressures from

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7

Kro¨ner, M., J. Fritz, and T. Sattelmayer. "Flashback Limits for Combustion Induced Vortex Breakdown in a Swirl Burner." Journal of Engineering for Gas Turbines and Power 125, no. 3 (2003): 693–700. http://dx.doi.org/10.1115/1.1582498.

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Flame flashback from the combustion chamber into the mixing zone limits the reliability of swirl stabilized lean premixed combustion in gas turbines. In a former study, the combustion induced vortex breakdown (CIVB) has been identified as a prevailing flashback mechanism of swirl burners. The present study has been performed to determine the flashback limits of a swirl burner with cylindrical premixing tube without centerbody at atmospheric conditions. The flashback limits, herein defined as the upstream flame propagation through the entire mixing tube, have been detected by a special optical

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8

El-Sherif, A. S. "Effects of natural gas composition on the nitrogen oxide, flame structure and burning velocity under laminar premixed flame conditions." Fuel 77, no. 14 (1998): 1539–47. http://dx.doi.org/10.1016/s0016-2361(98)00083-0.

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9

Mehra, Roopesh Kumar, Hao Duan, Sijie Luo, and Fanhua Ma. "Laminar burning velocity of hydrogen and carbon-monoxide enriched natural gas (HyCONG): An experimental and artificial neural network study." Fuel 246 (June 2019): 476–90. http://dx.doi.org/10.1016/j.fuel.2019.03.003.

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10

Mitu, Maria, Domnina Razus, and Volkmar Schroeder. "Laminar Burning Velocities of Hydrogen-Blended Methane–Air and Natural Gas–Air Mixtures, Calculated from the Early Stage of p(t) Records in a Spherical Vessel." Energies 14, no. 22 (2021): 7556. http://dx.doi.org/10.3390/en14227556.

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The flammable hydrogen-blended methane–air and natural gas–air mixtures raise specific safety and environmental issues in the industry and transportation; therefore, their explosion characteristics such as the explosion limits, explosion pressures, and rates of pressure rise have significant importance from a safety point of view. At the same time, the laminar burning velocities are the most useful parameters for practical applications and in basic studies for the validation of reaction mechanisms and modeling turbulent combustion. In the present study, an experimental and numerical study of t

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11

Miao, Haiyan, Min Ji, Qi Jiao, Qian Huang, and Zuohua Huang. "Laminar burning velocity and Markstein length of nitrogen diluted natural gas/hydrogen/air mixtures at normal, reduced and elevated pressures." International Journal of Hydrogen Energy 34, no. 7 (2009): 3145–55. http://dx.doi.org/10.1016/j.ijhydene.2009.01.059.

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12

Joo, S., S. Kwak, S. Kim, J. Lee, and Y. Yoon. "High-frequency transition characteristics of synthetic natural gas combustion in gas turbine." Aeronautical Journal 123, no. 1259 (2019): 138–56. http://dx.doi.org/10.1017/aer.2018.150.

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AbstractIn this study, the combustion instability and emission characteristics of flames of different H2/CH4 compositions were investigated in a partially premixed model gas turbine combustor. A mode shift in the frequency of instability occurred under varying experimental conditions from the first to the seventh mode of longitudinal frequency in the combustor, and a parametric study was conducted to determine the reasons for this shift by using the length of the combustor, a factor that determines the mode frequency of longitudinal instability, as the main parameter. Furthermore, heat load an

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13

Khan, A. R., M. R. Ravi, and Anjan Ray. "Experimental and Numerical Study of the Effect of Higher Hydrocarbon Content on Laminar Burning Velocity and Flame Stability of Natural Gas." Combustion Science and Technology 192, no. 2 (2019): 359–90. http://dx.doi.org/10.1080/00102202.2019.1565532.

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14

Yasiry, Ahmed, Jinhua Wang, Longkai Zhang, et al. "Experimental Study on the Effect of Hydrogen Addition on the Laminar Burning Velocity of Methane/Ammonia–Air Flames." Applied Sciences 13, no. 10 (2023): 5853. http://dx.doi.org/10.3390/app13105853.

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Variations in methane–ammonia blends with hydrogen enrichment can modify premixed flame behavior and play a crucial role in achieving ultra-low carbon emissions and sustainable energy consumption. Current combustion units may co-fire ammonia/methane/hydrogen, necessitating further investigation into flame characteristics to understand the behavior of multi-component fuels. This research aims to explore the potential of replacing natural gas with ammonia while making only minor adjustments to equipment and processes. The laminar burning velocity (LBV) of binary blends, such as ammonia–methane,

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15

Baumgärtner, Max H., and Thomas Sattelmayer. "Improvement of the turn-down ratio of gas turbines by autothermal on board syngas generation." Journal of the Global Power and Propulsion Society 1 (June 30, 2017): D0HPA5. http://dx.doi.org/10.22261/d0hpa5.

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Abstract The low reactivity of natural gas leads to a sudden increase of carbon monoxide (CO) and unburned hydrocarbons (UHC) emissions below a certain load level, which limits the part load operation range of current utility gas turbines in combined cycle power plants (CCPP). The feasibility of catalytic autothermal syngas generation directly upstream of gas turbine burners to improve burn-out at low flame temperatures is studied in this paper. The adiabatic reformer is supplied with a mixture of natural gas, air and water and generates syngas with high reactivity, which results in better low

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16

Khan, A. R., M. R. Ravi, and Anjan Ray. "Experimental and chemical kinetic studies of the effect of H2 enrichment on the laminar burning velocity and flame stability of various multicomponent natural gas blends." International Journal of Hydrogen Energy 44, no. 2 (2019): 1192–212. http://dx.doi.org/10.1016/j.ijhydene.2018.10.207.

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17

Morovatiyan, Mohammadrasool, Martia Shahsavan, Mammadbaghir Baghirzade, and J. Hunter Mack. "Impact of Syngas Addition to Methane On Laminar Burning Velocity." Journal of Engineering for Gas Turbines and Power, November 6, 2020. http://dx.doi.org/10.1115/1.4049012.

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Abstract Exhaust gas recirculation (EGR) in spark-ignited engines is a key technique to reduce in-cylinder NOx production by decreasing the combustion temperature. The major species of the exhaust gas in rich combustion of natural gas are hydrogen and carbon monoxide, which can subsequently be recirculated to the cylinders using EGR. In this study, the effect of hydrogen and carbon monoxide addition to methane on laminar burning velocity and flame morphological structure is investigated. Due to the broad flammability limit and high burning velocity of hydrogen compared to methane, this additio

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18

"99/01447 Effects of natural gas composition on the nitrogen oxide, flame structure and burning velocity under laminar premixed flame conditions." Fuel and Energy Abstracts 40, no. 2 (1999): 146. http://dx.doi.org/10.1016/s0140-6701(99)96628-6.

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19

Yepes, Hernando Alexander, Arley Cardona Vargas, and Andrés Amell Arrieta. "Kinetic study of the effect of sub-atmospheric conditions on the laminar burning velocity of high C₂H₆ content natural gas mixtures." Combustion Theory and Modelling, January 3, 2022, 1–27. http://dx.doi.org/10.1080/13647830.2021.2016981.

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20

Subash, Arman Ahamed, Haisol Kim, Sven-Inge Möller, et al. "Investigation of Fuel and Load Flexibility in a Siemens Gas Turbine-600/700/800 Burner Under Atmospheric Pressure Conditions Using High-Speed Hydroxyl-PLIF and Hydroxyl Radical Chemiluminescence Imaging." Journal of Engineering for Gas Turbines and Power 143, no. 8 (2021). http://dx.doi.org/10.1115/1.4049499.

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Abstract Fuel and load flexibility have been increasingly important features of industrial gas turbines in order to meet the demand for increased utilization of renewable fuels and to provide a way to balance the grid fluctuations due to the unsteady supply of wind and solar power. Experimental investigations were performed using a standard third-generation dry low emission (DLE) burner under atmospheric pressure conditions to study the effect of central and pilot fuel addition, load variations, and hydrogen (H2) enrichment in a natural gas (NG) flame. High-speed kHz planar laser-induced fluor

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