Numerical Investigation of the Re-entry Flight of Hayabusa and Comparison to Flight Data

Abstract

This paper presents a comparison of re-entry ight data measured by the NASA/JAXA Hayabusa Observation campaign with numerical calculations and ground testing in the NASA Ames Electric Arc Shock Tube (EAST) facility and the University of Stuttgart plasma wind tunnel, Plasmawindkanal 1 (PWK1). The numerical calculations were conducted using the University of Stuttgart URANUS code including thermal and chemical non-equilibrium as well as radiation transport modeled by the programs HERTA and PARADE. The ow eld calculations were extended by an ablation calculation using FABL (Fluid Gravity Engineering Ablation code). These simulations were performed for 17 trajectory points chosen from the nominal ight trajectory provided by NASA. The ground testing in the