Now showing items 1-10 of 69
Lambertian invariance and application to the problem of optimal fixed-time impulsive orbital transfer
(Elsevier, 1983)
To develop an efficient technique for the numerical solution of the Lambert problem, a new Lambertian invariant, the ratio of two invariable lengths, is proposed to replace the Gauss ratio of two areas as the main iterative ...
Deceleration and heating constrained footprint of shuttle vehicles
(Elsevier, 1985-10)
With increasing frequency in shuttle operation, it is of interest to have more than one or two landing fields within the boundary of the reachable area of the reentry vehicle. This boundary, called the footprint, depends ...
Optimal aeroassisted return from high earth orbit with plane change
(Elsevier, 1985-01)
This paper gives a complete analysis of the problem of aeroassisted return from a high Earth orbit to a low Earth orbit with plane change. A discussion of pure propulsive maneuver leads to the necessary change for improvement ...
A simple analysis of the blast initiation of detonations
(Elsevier, 1977)
A detonation can be initiated in a fuel-oxidizer cloud by a blast wave of sufficient strength. The Zel'dovich criterion for initiation is that the blast energy must be such that when the pressure ratio across the shock ...
A Parallel Adaptive 3D MHD Scheme for Modeling Coronal and Solar Wind Plasma Flows
(Kluwer Academic Publishers; Springer Science+Business Media, 1999-03)
A parallel adaptive mesh refinement (AMR) scheme is described for solving the governing equations of ideal magnetohydrodynamics (MHD) in three space dimensions. This solution algorithm makes use of modern finite-volume ...
Dust–Gas Interrelations In Comets: Observations And Theory
(Kluwer Academic Publishers; Springer Science+Business Media, 1997-01)
The development of the expanding atmospherefrom the evaporating cometary nucleus has traditionallyfocused on observing and modeling the separatedevelopment of two distinct components, gas and dust,which are coupled dynamically ...
The darboux point and the conjugate point on optimal deorbit for reentry trajectories
(Elsevier, 1985-10)
The concept of the Darboux point at which an extremal loses its global optimality is extended to the case of discontinuous control. Using Contensou's domain of maneuverability, the condition for optimal switching at a ...
Minimum-fuel, power-limited transfers between coplanar elliptical orbits
(Elsevier, 1993-01)
Two methods of computing coplanar, minimum-fuel, power-limited transfers are developed, based on approximate solutions obtained by the averaging method. In the first method, the average solution provides estimates of the ...
Optimal multiple-pass aeroassisted plane change
(Elsevier, 1990)
This paper presents the exact dimensionless equations of motion and the necessary conditions for the computation of the optimal trajectories of a hypervelocity vehicle flying through a non-rotating spherical planetary ...
The ground impulse generated by a plane fuel-air explosion with side relief
(Elsevier, 1979)
Detonations can be initiated in unconfined fuel-oxidizer clouds by blast waves of sufficient energy. The ground impulse generated by such detonations can cause considerable damage. An analytical theory is developed in the ...