Multiscale Modeling of Plasma-Assisted Non-Premixed Microcombustion

Giacomo Cinieri, Ghazanfar Mehdi*, Maria Grazia De Giorgi*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

26 Downloads (Pure)

Abstract

This work explores microcombustion technologies enhanced by plasma-assisted combustion, focusing on a novel simulation model for a Y-shaped device with a non-premixed hydrogen-air mixture. The simulation integrates the ZDPlasKin toolbox to determine plasma-produced species concentrations to Particle-In-Cell with Monte Carlo Collision analysis for momentum and power density effects. The study details an FE-DBD plasma actuator operating under a sinusoidal voltage from 150 to 325 V peak-to-peak and a 162.5 V DC bias. At potentials below 250 V, no hydrogen dissociation occurs. The equivalence ratio fitting curve for radical species is incorporated into the plasma domain, ensuring local composition accuracy. Among the main radical species produced, H reaches a maximum mass fraction of 8% and OH reaches 1%. For an equivalence ratio of 0.5, the maximum temperature reached 2238 K due to kinetic and joule heating contributions. With plasma actuation with radicals in play, the temperature increased to 2832 K, and with complete plasma actuation, it further rose to 2918.45 K. Without plasma actuation, the temperature remained at 300 K, reflecting ambient conditions and no combustion phenomena. At lower equivalence ratios, temperatures in the plasma area consistently remained around 2900 K. With reduced thermal power, the flame region decreased, and at Φ = 0.1, the hot region was confined primarily to the plasma area, indicating a potential blow-off limit. The model aligns with experimental data and introduces relevant functionalities for modeling plasma interactions within microcombustors, providing a foundation for future validation and numerical models in plasma-assisted microcombustion applications.

Original languageEnglish
Article number697
Number of pages20
JournalAerospace
Volume11
Issue number9
DOIs
Publication statusPublished - Sept 2024
MoE publication typeA1 Journal article-refereed

Keywords

  • dielectric barrier discharge
  • flow control
  • microcombustor
  • plasma-assisted combustion
  • thermal performance enhancement

Fingerprint

Dive into the research topics of 'Multiscale Modeling of Plasma-Assisted Non-Premixed Microcombustion'. Together they form a unique fingerprint.

Cite this