Thomas Whalen
University of Maryland
Characterization of multi-body aerodynamic interactions between separating bodies in high-speed flow is critical for improving trajectory prediction capabilities of de-orbiting space debris and precluding re-contact of rocket boosters during payload ascent. State-of-the-art tools rely on unvalidated static computational fluid dynamics (CFD) databases to simulate body trajectories, and a dearth of analytical modeling prevents parametric study of the key elements governing separation events. This two-phased program seeks to remedy the current knowledge gaps with a multi-disciplinary approach involving free-flight hypersonic wind tunnel testing and dynamic CFD simulations. By first focusing on separation of agglomerated ellipsoidal geometries as space debris analogs and then models more reminiscent of realistic flight vehicles, the proposed program will provide validation data for the static CFD methodology and develop separation models based on observed aerodynamic interference effects. This research aligns with the needs specified in TABS elements 9.4.5.8, 9.4.5.9, and 9.4.5.12 of the 2015 NASA Technology Roadmap.