Large eddy simulation of plasma-assisted ignition and combustion in a coaxial jet combustor

Dong, Ming; Cui, Jinglong; Shang, Yan; Li, Sufen

doi:10.1016/j.energy.2020.117463

Cited by 12 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[17][18][19][20] In nonequilibrium plasmas, the electron temperature is significantly higher and the plasma is kinetically active due to new reaction pathways enabled by electron collisions. 21 Consequently, non-equilibrium plasmas are superior for some combustion applications in various ways, for example, NOx emission treatments, 13,15,16 Low Temperature Combustion (LTC), 22,23 shortening ignition time, [24][25][26] generation of volumetric ignition with increased heat release rates, [27][28][29] stabilization of lean and turbulent flames 14,30,31 and on-board fuel reforming. [32][33][34] The superiority is attributed to the new reaction pathways introduced by the energetic electrons of the nonequilibrium plasmas.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of plasma assisted ignition by multi-voltage pulse discharges: A theoretical study

Druker,

Goldwine,

Greenberg

et al. 2024

International Journal of Engine Research

View full text Add to dashboard Cite

Currently, compression ignition engine technology is becoming less competitive compared to spark ignition engine technology due to emission standards. Lean combustion strategies are preferable for spark ignition engines, but they require enhanced ignition strategies compared to current stoichiometric spark ignition engines. In this paper, we lay physical foundations for such enhanced ignition strategies that can support lean combustion strategies in spark ignition engines. In this theoretical study, we conduct a preliminary foray into the possibility of controlling the species composition of a cold-plasma kernel as a precursor for an ignition process. We consider a multi-pulse electric source system coupled to a DBD (Dielectric Barrier Discharge) electrode immersed in a dry air medium. The coupled system is designed such that the medium in the electrodes’ gap is subjected to a pulse structure which is composed of a peak voltage followed by a secondary low-voltage pulse. Use is made of a comprehensive mathematical model that includes the electric field, potential and current, with the relevant conservation equations for 24 species and 168 kinetic reactions, while considering different energy modes (rotational, vibrational, electronic excitation, dissociation, and ionization) within the electrodes’ gap. The model was validated against independent published results, and was used to understand the mechanism of energy conversion to species that play a central role in terms of the ultimate ignition dynamics. Various pulse repetition frequencies and different pulse constructions were considered. Special attention was given to the amount of deposited energy, and to the energy channeled to known ignition supportive modes and species. The present results show that the energy deposition can be divided into two main stages which are characterized by high and low voltage levels, respectively. We propose that for more successful ignition, the amount of energy deposition during the second (low voltage) stage should be higher than that during the first (high voltage) stage. During the second stage, the deposition of energy into specific modes can be fine-tuned by setting appropriate voltage levels. Based on these findings, we demonstrate how control of the sequence of voltage pulses can further increase enhancement of ignition and combustion promoting processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancement of plasma assisted ignition by multi-voltage pulse discharges: A theoretical study

Druker,

Goldwine,

Greenberg

et al. 2024

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…This code has the capability of solving a set of species balance equations along with the transient mass and momentum balances. However, while its performance for combustion phenomena has been reported extensively in the literature [29][30][31] there is still a lack of assessment for other applications, such as isothermal reaction phenomena. After verifying the CFD results against the experimental data, the study focuses on the influence of different operational conditions on the system's efficiency, which cannot be done otherwise by analytical approaches.…”

Section: Introductionmentioning

confidence: 99%

A CFD study of an annular pilot plant reactor for Paracetamol photo-Fenton degradation

Venier

Conte

Pérez-Moya

et al. 2021

Chemical Engineering Journal

View full text Add to dashboard Cite

Experimental investigation of the discharge and thermal characteristics of an alternating current dielectric-barrier discharge plasma reactor

Zhao¹,

Mao²,

Bai³

et al. 2022

Applied Thermal Engineering

View full text Add to dashboard Cite

Large eddy simulation of plasma-assisted ignition and combustion in a coaxial jet combustor

Cited by 12 publications

References 30 publications

Enhancement of plasma assisted ignition by multi-voltage pulse discharges: A theoretical study

Enhancement of plasma assisted ignition by multi-voltage pulse discharges: A theoretical study

A CFD study of an annular pilot plant reactor for Paracetamol photo-Fenton degradation

Experimental investigation of the discharge and thermal characteristics of an alternating current dielectric-barrier discharge plasma reactor

Contact Info

Product

Resources

About