Numerical assessment of MILD combustion enhancement through plasma actuator

Amir Mardani and Andisheh Khanehzar

Energy, 2019, vol. 183, issue C, 172-184

Abstract: One promising solution to achieve moderate or intense low-oxygen dilution (MILD) combustion under lower temperatures may be using non-equilibrium plasma discharge. Plasma assisted combustion can extend the flammability limits by reducing the auto-ignition temperature of the reactants and can be a great approach to achieve steady MILD combustion under extreme conditions through decreasing ignition delay time. In particular, the influence of the outlet flows from a co-flowing cylindrical dielectric barrier discharge (DBD) on the CH4/N2 combustion under MILD combustion has been investigated numerically through some simplifications on plasma discharge. A three streams coaxial burner are modeled in a 2D-axisymmetric computational domain by a steady state approach. On the whole, different effects of simplified non-equilibrium plasma discharging, fuel dilution, and oxygen concentration of the preheated oxidizer on MILD combustion regimes are studied. It is found that applying the plasma discharge to the flame region, leads to an intensification of the reaction zone, increment of the rate of heat release by around a factor of 3, and 30% reduction of flame lift-off. Different aspects of plasma effect through chemical kinetics, mixing, and thermal heating on MILD combustion are investigated. Apart from all the benefits of plasma such as improving the mixing, it has a momentous impact on both the reaction zone length and its diameter via improving the ignition delay time.

Keywords: MILD; Non-equilibrium plasma; DBD; Dilution; Preheat (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544219312344
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:183:y:2019:i:c:p:172-184

DOI: 10.1016/j.energy.2019.06.102

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().