In order to optimize the application of aeroassist concepts to maneuvering re-entry vehicles, it is essential to have a scheme that can accurately and simultaneously predict the vehicle's aerodynamic forces and moments, as well as the corresponding surface heat-transfer rates. phase i of this effort… More

In recent years the projected design of advanced orbital transfer vehicles has been evolving very rapidly. these vehicles are to operate and decelerate in the low-density (high-altitude) flight regimes where the flowfield is more appropriately that of finite-rate chemically reacting air. apart from… More

Carbon, epoxy and teflon are some of the most common and frequently used materials for rv applications. under hypersonic reentry conditions at high angles of attack the ablation products from these materials may significanty affect the flowfield chemistry around the body, the electron concentration… More

Over the past several years significant interest has been generated in three-dimensional flowfield analyses of lifting reentry vehicles. the parabolized navier-stokes (pns) schemes are elliptic in the crossflow direction and can treat regions of crossflow separation. the present non-iterative afwal… More

The development of a computer code to solve for the flow over a helicopter rotor/fuselage configuration is proposed. a modular approach is to be used where two existing finite difference codes, one for the rotor, the other for the fuselage are mated. the individual modules have been previously… More

Over the past several years, it has been clearly demonstrated that development of transatmospheric vehicles, such as the national aerospace plane (nasp), will be necessary for a successful space-defense system. it is accepted that the design and analysis of such vehicles will rely heavily upon a… More

Because of a lack of adequate flight or ground test data for hypersonic reentry conditions, the design and analysis of existing and future brvs, marvs and decoys will increasingly benefit from the development of accurate and reliable numerical tools for predicting such hypersonic flowfields. to… More