Trans-atmospheric dynamics of an ablating hypervelocity body

Astronomy and Astrophysics – Astronomy

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Celestial Mechanics, Stellar Dynamics, Comets: General, Meteors, Meteoroids

Scientific paper

The dynamics of an ablating hypervelocity body during passage through a planetary atmosphere are investigated using the method of matched asymptotic expansions. Using this methodology, analytic solutions are obtained which uniformly represent the motion of such a body from exo-atmospheric to endo-atmospheric flight in closed form. The ablative mass loss of the body is synthesized with the Keplerian exo-atmospheric solution to produce an analysis that couples the changing body mass to its flight dynamics. As such, accurate ablative mass losses and drag-induced energy losses may be explicitly obtained from exo-atmospheric initial conditions (orbital elements).

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