Non-local Electron Kinetic Fluid Models for Development of Predictive Tools for Plasma Assisted Combustion/Ignition
Abstract
The last two decades has seen the emergence of non-equilibrium plasma as a viable mechanism for combustion ignition, reducing the ignition delay, and improving the flame stability and flammability limits at various fuel-air mixture flows including supersonic and fuel composition including hydrocarbons and hydrogen. Advanced engines and new engine technology with low emission requiring mild combustion and cool flames are being investigated both for environmental and national security reasons. The plasma discharge impacts combustion in several ways including thermal enhancement, kinetic enhancement, and transport enhancement. The prediction of ignition by non-thermal plasma requires a quantitative understanding of the electrical energy partitioning to heat, excitation, and dissociation and ionization of air and fuel by electron impact ionization. An important component that is lacking in current models is the accurate description of electric discharge phase which determines the energy partitioning into vibrational, electronic, dissociation, and ionization states. The main objectives of this project are to develop a robust non-local electron kinetics model of the radical production phase (discharge phase) and integrate it into existing plasma chemistry and combustion models. The radical production phase model will be validated using existing experimental and simulation data. For quantitative evaluation, we will determine the number of radicals produced per 100 eV of electrical energy for various types of discharge configuration and fuel/oxidizer composition. Although the project will investigate a set of very specific combustion processes, we will also develop a framework for a quantitative predictive model for plasma-assisted combustion in general. A novel plasma excitation method using rotating electric fields will be developed that is attractive for advanced engine concepts. This project will strengthen the infrastructure and capability of Old Dominion University to compete for DoD funding in combustion research related to propulsion. The project provides an excellent opportunity to train both graduate and undergraduate students in the interdisciplinary field of non-thermal plasma and plasma chemistry. Students with knowledge in this field will be able to contribute to basic science, manufacturing, and defense sectors.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 24, 2023
- Source ID
- W911NF2310173
Entities
People
- Shirshak Dhali
Organizations
- Army Contracting Command
- Office of the Secretary of Defense
- Old Dominion University