ISSN:
1572-9648
Keywords:
Flight dynamics
;
aerospace vehicles
;
aircraft dynamics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Description / Table of Contents:
Sommario Si studiano alcune questioni fondamentali della meccanica del volo di veicoli aerospaziali a quote molto elevate. Si considerano, in particolare, quei tratti delle traiettorie lungo i quali le azioni aerodinamiche si esplicano in un campo di numeri di Knudsen tra la transizione ed i flussi di molecole libere. Si adotta un recente modello fisico-matematico per calcolare i coefficienti aerodinamici e di scambio termico. Dopo aver discusso le caratteristiche di stabilit`a per due configurazioni di velivoli di riferimento, se ne calcolano le leggi orarie a partire da condizioni di equilibrio significative. Il lavoro termina con lo studio di un traferimento orbitale aeroassistito al fine di valutare i limiti a questa manovra dovuti al riscaldamento aerodinamico.
Notes:
Abstract Some basic questions of the flight mechanics of aerospace vehicles at very high altitudes are investigated and in some cases reviewed. In particular those of the spacecraft trajectories are considered along which the aerodynamic actions take place in a range of the Knudsen number between transition and free molecular flow. A recent physico-mathematical model is adopted in the evaluation of the aerodynamic and heat transfer coefficients. The stability characteristics are discussed of two reference vehicle configurations for which the time histories are also calculated relative to significant equilibrium conditions. In the final section of the paper the initial step of an aeroassisted orbit transfer is considered in order to evaluate the constraints due to the aerodynamic heating on this manoeuvre.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00989525
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