Atmospheric re-entry capsules suffer dynamic instabilities, resulting in undamped aerodynamic pitching oscillations. The aim of this work is the characterization of the dynamic stability of a capsule with a 45° sphere-cone deployable heat shield by applying the forced-oscillation method through Computational Fluid Dynamics. Results have been analysed to investigate the influence of Mach number and oscillation amplitude, revealing a peak of instability in the transonic regime, enhanced at low amplitude. The predicted pitching behaviour has been compared with the available data of similar shape capsules in literature, showing a reasonably good agreement.
Study on Aerodynamic Stability of a Deployable Aerobraking Re-entry Capsule / Zamprotta, Alessandro; Fedele, Alberto; Mungiguerra, Stefano; Savino, Raffaele. - (2019). (Intervento presentato al convegno EUCASS 2019 tenutosi a Madrid, Spain nel 1-4 July 2019).
Study on Aerodynamic Stability of a Deployable Aerobraking Re-entry Capsule
Stefano Mungiguerra;Raffaele Savino
2019
Abstract
Atmospheric re-entry capsules suffer dynamic instabilities, resulting in undamped aerodynamic pitching oscillations. The aim of this work is the characterization of the dynamic stability of a capsule with a 45° sphere-cone deployable heat shield by applying the forced-oscillation method through Computational Fluid Dynamics. Results have been analysed to investigate the influence of Mach number and oscillation amplitude, revealing a peak of instability in the transonic regime, enhanced at low amplitude. The predicted pitching behaviour has been compared with the available data of similar shape capsules in literature, showing a reasonably good agreement.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
