Hybrid Computational Model for High-Altitude Aeroassist Vehicles

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,961.00
Award Year:
2007
Program:
SBIR
Phase:
Phase II
Contract:
NNL07AA15C
Award Id:
77550
Agency Tracking Number:
053951
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
6210 Kellers Church Road, Pipersville, PA, 18947
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
929950012
Principal Investigator:
Richard Wilmoth
Principal Investigator
(757) 595-7315
wilmoth@craft-tech.com
Business Contact:
Paula Schachter
Business Official
(215) 766-1520
schachte@craft-tech.com
Research Institute:
n/a
Abstract
The proposed effort addresses a need for accurate computational models to support aeroassist and entry vehicle system design over a broad range of flight conditions including direct entry and aerocapture trajectories for manned and unmanned earth return and planetary exploration. These models are critical for assessing aerodynamic characteristics including reaction control systems (RCS) influences and for designing thermal protection systems involving both ablating and non-ablating materials. A hybrid approach unifying continuum CFD and rarefied DSMC flow solvers will be developed that can handle both higher altitude continuum flows, i.e. 60~85km, with embedded rarefied zones such as the base/near-wake region as well as higher altitude rarefied flows with embedded continuum zones such as RCS jet plumes. The proposed model will automatically separate continuum and rarefied regions into distinct computational domains employing a unique methodology demonstrated in Phase I to construct hybrid interface surfaces for complex three-dimensional geometries. The model will incorporate RCS jet and advanced ablative models and will provide consistent nonequilibrium thermochemical modeling between the CFD and DSMC solutions. This methodology provides a more efficient and accurate tool than provided by continuum CFD or DSMC alone and provides the flexibility to address a wide range of vehicle and system designs.

* information listed above is at the time of submission.

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