The Effect of Initial Conditions on the Laminar Burning Characteristics of Natural Gas Diluted by CO2

Han, Zhiqiang; Zhu, Zhennan; Wang, Peng; Liang, Kun; Zuo, Zhengxing; Zeng, Dongjian

doi:10.3390/en12152892

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…Han et al [41] investigated flame instability and LBV in a constant volume chamber. The initial temperatures (323 K-423 K), initial pressures (0.1 MPa-0.3 MPa), and dilution rate (0-16%, CO2 as diluent gas) at a series of equivalency ratios (0.7-1.2) are varied.…”

Section: Laminar Flame Speed and Burning Velocitymentioning

confidence: 99%

Flame Speed and Laminar Burning Velocity in Syngas/Air Mixtures: A Review

Mahdi¹,

Al-Dulaimi²

2022

I2M

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Flame speed and laminar burning velocity (LBV) are important properties of fuel combustion. Both have an impact on how combustion systems are designed and operated. As a result, understanding how LBV and flame speed fluctuate as a function of thermodynamic conditions is critical for understanding the impact of practical applications in all combustion systems. Working pressures and temperatures are far higher than those found in the environment. Several studies on flame speed and LBV have been conducted. This study, however, includes a thorough literature analysis of approaches and procedures used to measure these two parameters, as well as the effects of operational factors for various fuels, with a focus on biofuels, for the sake of review simplicity.

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Section: Laminar Flame Speed and Burning Velocitymentioning

confidence: 99%

Flame Speed and Laminar Burning Velocity in Syngas/Air Mixtures: A Review

Mahdi¹,

Al-Dulaimi²

2022

I2M

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“…Domestic and international scholars have conducted a lot of research regarding the influence of initial pressure (Pu), initial temperature (Tu), mixed gas composition and concentration on laminar burning velocity (u L ). Han et al [7] analysed the effect of initial temperature (323-423 K) on the laminar flame of premixed natural gas through experimental studies. The results show that, with the increase in Tu, u L gradually increases.…”

Section: Introductionmentioning

confidence: 99%

The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2

Wang

Zhu

et al. 2021

Energies

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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 initial temperature increases, the initial pressure decreases and the dilution rate decreases, the rate of change in laminar burning velocity increases. The equivalent effect of initial condition coupling can obtain equal laminar burning velocity with an dilution rate increase (or decrease) of 2% and an initial temperature increase (or decrease) of 29 K. Moreover, the increase in equivalence ratio leads to the rate of change in laminar burning velocity first increasing and then decreasing, while the increases in dilution rate and initial pressure make the rate of change in laminar burning velocity gradually decrease and the increase in initial temperature makes the rate of change in laminar burning velocity gradually increase. The area of the region, where the initial temperature influence weight is larger, gradually decreases as the dilution rate increases, and the rate of decrease gradually decreases.

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“…Increasingly serious environmental pollution and energy shortage have drawn widespread concerns and are strongly require promising replacements for conventional fossil fuels [1]. Different kinds of alternative fuels are becoming growing interests including natural gas, hydrogen, and alcohols [2][3][4]. Both methanol and ethanol are being used more and more widely.…”

Section: Introductionmentioning

confidence: 99%

Laminar Flame Characteristics of Premixed Methanol–Water–Air Mixture

et al. 2020

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Methanol is hygroscopic in a gaseous state and is a promising alternative fuel for internal combustion engines. It is understood that adding water can improve the antiknock performance for spark ignition engines, but this will also affect the flame speed and stability. In this work, laminar flame characteristics of methanol/water/air mixtures were experimentally investigated at a temperature range of 380–450 K, a pressure range of 1–4 bar, and water fractions (vaporous water molar fraction in the water–methanol fuel gas) of 0–40%. The results show that laminar burning velocity increases with temperature but decreases with pressure. The burning velocity decreases linearly with water fraction at a stoichiometric ratio. For rich mixtures and high pressures, the laminar flames tend to be more sensitive to stretch and, thus, more prone to being unstable. Increasing the water fraction can slightly increase the Markstein length. Increasing the initial pressure enhances the general flame instability, while increasing the initial temperature suppresses the general flame instability. Increasing the water fraction can lead to a decreasing thermal expansion ratio and an elevated flame thickness, both of which can lead to a suppression of hydrodynamic instability. An increase in the water fraction decreases the Lewis number, resulting in preferential diffusion instability. There is no direct relationship between the onset of cellularity and general flame instability.

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The Effect of Initial Conditions on the Laminar Burning Characteristics of Natural Gas Diluted by CO2

Cited by 6 publications

References 23 publications

Flame Speed and Laminar Burning Velocity in Syngas/Air Mixtures: A Review

Flame Speed and Laminar Burning Velocity in Syngas/Air Mixtures: A Review

The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2

Laminar Flame Characteristics of Premixed Methanol–Water–Air Mixture

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