Entry Radiative Transfer

Moore, F. K.

doi:10.1007/978-3-642-48927-3_5

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…A strong function of orbital velocity, radiative heat flux starts to dominate stagnation heat flux for re-entry velocities approaching that of approximately 11.2 km∕s for a parabolic orbit [34]. Since orbital velocities associated with skip entry maneuvers are less than this threshold, then the convective mode of heat flux is considered to be the dominant form of energy transfer, with all radiative heat flux assumed to be negligible [35,36]. From this assumption, an estimate of convective, stagnation heat flux as a function of atmospheric density and orbital velocity is given by Eq.…”

Section: Deceleration and Heat Fluxmentioning

confidence: 99%

Design of Experiment Approach to Atmospheric Skip Entry Maneuver Optimization

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Black

Agte

2015

Journal of Spacecraft and Rockets

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An optimal trans-atmospheric vehicle and trajectory design are presented to simultaneously maximize the change in inclination angle and minimize total ΔV for an atmospheric skip entry maneuver. As an alternative to contemporary optimization techniques such as pseudospectral methods, a Design of Experiments approach featuring orthogonal arrays of experiments is implemented to solve the multi-objective maneuver optimization problem of atmospheric reentry. Conducting both Pareto front and main effects analysis, the optimal solution is determined by evaluating the relative performance of six design variables, to include mass, planform area, aerodynamic coefficients, perigee altitude, and bank angle. Depending on the chosen re-circularization altitude, the optimal design performing an out-of-plane skip entry maneuver can achieve an inclination change of 19.91 deg with 50-85% less ΔV than a simple plane change. Nomenclature a = semi-major axis, m C D , C L = drag and lift coefficients, respectively D = aerodynamic drag force, N g = gravitational acceleration, m∕s 2 h = altitude, m i = inclination angle, deg L = aerodynamic lift force, N m = vehicle mass, kg _ Q = heat flux, kW∕m 2 r = geocentric radial distance, m S = planform area, m 2 V = velocity, m∕s β = inverse scale height, 1∕m γ = flight-path angle, deg θ = longitude, deg μ = gravitational parameter, m 3 ∕s 2 ρ = atmospheric density, kg∕m 3 σ = bank angle, deg ϕ = latitude, deg ψ = heading angle, deg ω· = planetary rotation rate, rad∕s Subscripts f = final condition i = initial condition I = measured with respect to an inertial frame R = measured with respect to a rotating frame SL = sea-level condition = conditions for the Earth

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Section: Deceleration and Heat Fluxmentioning

confidence: 99%

Design of Experiment Approach to Atmospheric Skip Entry Maneuver Optimization

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Black

Agte

2015

Journal of Spacecraft and Rockets

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Comparative Study of Phasing, Atmospheric Skip Entry, and Simple Plane Change Maneuvers

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2014

Journal of Spacecraft and Rockets

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A suite of maneuvers comprising planar phasing, out-of-plane skip entry, and simple plane changes is simulated for a notional transatmospheric, lifting reentry vehicle with lift-to-drag ratio of six. By comparing the relative performance of each maneuver by overflying geographically diverse sample ground targets, it is demonstrated that skip entry maneuvers require a total [Formula: see text] less than [Formula: see text]. For select targets and a single initial reference orbit, simulation results demonstrate a significant savings in [Formula: see text] expenditure for skip entry compared with the simple plane change alternative. Overall, the simulated skip entry maneuvers consistently provide responsive mission execution in terms of ground target time of arrival, with maximum deceleration and stagnation heat flux less than [Formula: see text] and [Formula: see text], respectively.

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Entry Radiative Transfer

Cited by 2 publications

References 17 publications

Design of Experiment Approach to Atmospheric Skip Entry Maneuver Optimization

Design of Experiment Approach to Atmospheric Skip Entry Maneuver Optimization

Comparative Study of Phasing, Atmospheric Skip Entry, and Simple Plane Change Maneuvers

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