Achieving Flight in Earth's Mesosphere and Mars

Student’s name: Adam Aharonoff Home Institution: New York University NNCI Site: MANTH @ UPenn REU Principal Investigator: Professor Igor Bargatin – Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania REU Mentor: Tom Celenza - Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania Abstract: This research focuses on the development and optimization of 3D photophoretic propulsion systems for lightflyers, aiming to improve their efficiency and performance in extraterrestrial environments. Photophoretic propulsion harnesses momentum transfer from light-induced temperature gradients on a lightflyer's surface, generating lift in low-pressure conditions (1-100 Pa). This study examines the impact of hexagonal channel dimensions—specifically hexagon diameter and channel height—on hemispherical lightflyers, to identify the optimal configuration for maximizing propulsion efficiency. Furthermore, this research experimentally investigates the jet propulsion effect induced by closing the hemispheres by 1/4π radians.