Seminars

This dissertation explores the microwave-excited plasma discharges within resonant structures and their potential applications in advancing the electric propulsion capabilities of CubeSats. The main goal of this study is to explore the fundamental physics of interactions between microwaves, plasma, and flow in resonant structures under high pressure, employing high-fidelity computational models for the simulation and analysis of these phenomena. Absorbed wave power into plasma discharge is found to be the main contribution to gas heating sources, which is crucial for achieving a high specific impulse of the thruster. Through systematic simulations, this research examines various resonant geometries and operational parameters to ascertain their impact on propulsion performance, thereby providing detailed insights into the enhancement of thruster efficiency. Starting with models based on previous experimental prototypes, this study utilizes a two-dimensional, self-consistent, multi-species fluid model to simulate the behavior of wave-heated plasma discharges in bulk gas flow, aiming to correlate computational findings with experimental data. It proposes modeling work of a novel all-dielectric resonators (all-DRs) based MET, focusing on plasma discharge localization to improve system efficiency and control. This comprehensive investigation of microwave and plasma interactions and their impact on gas heating and thrust generation sets the foundation for advanced electrodeless electrothermal propulsion systems, potentially extending mission durations and broadening the scope of space exploration and satellite functionality.