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Open AccessArticle

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

1
Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610039, China
2
Department of Engineering and Design, University of Sussex, Brighton BN1 9QT, UK
*
Author to whom correspondence should be addressed.
Energies 2019, 12(15), 2892; https://doi.org/10.3390/en12152892
Received: 17 May 2019 / Revised: 14 July 2019 / Accepted: 17 July 2019 / Published: 27 July 2019
(This article belongs to the Special Issue Experimental and Numerical Analysis of Fuel Spray in Engines)
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 calculate the laminar burning velocity and essential radicals’ concentrations under the same initial conditions. The results show that the laminar burning velocity of natural gas increases with initial temperature but decreases with initial pressure and dilution rate. The maximum concentrations of H, O and OH increase with initial temperature but decrease with initial pressure and dilution rate. Laminar burning velocity is highly correlated with the sum of the maximum concentration of H and OH. View Full-Text
Keywords: natural gas; diluent gas; laminar burning velocity; flame instability; concentration of radicals natural gas; diluent gas; laminar burning velocity; flame instability; concentration of radicals
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MDPI and ACS Style

Han, Z.; Zhu, Z.; Wang, P.; Liang, K.; Zuo, Z.; Zeng, D. The Effect of Initial Conditions on the Laminar Burning Characteristics of Natural Gas Diluted by CO2. Energies 2019, 12, 2892.

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