NASA STTR 2009 Solicitation


PROPOSAL NUMBER: 09-1 T8.01-9965
RESEARCH SUBTOPIC TITLE: Computational Fluid Dynamics Mesh Creation
PROPOSAL TITLE: Mesh Generation and Adaption for High Reynolds Number RANS Computations

NAME: Research South, Inc. NAME: George Mason University
STREET: 555 Sparkman Dr. Suite 1612 STREET: 4400 University Drive
CITY: Huntsville CITY: Fairfax
STATE/ZIP: AL  35816 - 3431 STATE/ZIP: VA  22030 - 4444
PHONE: (256) 721-1769 PHONE: (703) 993-9309

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Lawrence Spradley
555 Sparkman Dr. Suite 1612
Huntsville, AL 35816 - 3431
(256) 721-1769

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 5
End: 8

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
This proposal offers to provide NASA with an automatic mesh generator for the simulation of aerodynamic flows using Reynolds-Averages Navier-Stokes (RANS) models. The tools will be capable of generating high-quality, highly-stretched (anisotropic) grids in boundary layer regions and transition smoothly to inviscid flow regions even in an adaptive context. The objective of the work is to offer a unified view for generating quality and robust RANS meshes coupled naturally with anisotropic mesh adaptation. Our innovation is to view the anisotropic mesh generation within the Riemannian metric framework which thus far has been used exclusively in anisotropic mesh adaptation. Using the metric-based framework allows much easier handling of the large mesh size ratios involved in the computation, whereas traditional methods use the Euclidean framework to compute distance and volume. This innovative view to generate these meshes makes the entire procedure more generic and much more robust. The emphasis is being put on deriving a completely automatic process to generate quality and robust anisotropic meshes. Our existing and proven software package will be modified to include these innovative methods. A NASA test case will be computed for validation of the methods. The software will be delivered in Phase II.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Next generation vehicles are being designed at NASA for space travel including launch configurations and modules for entry into planetary atmospheres at extreme velocities. Analysis and design of propulsion systems will be a major requirement for this new generation aerospace flight hardware. High fidelity CFD software is needed for design of these new systems across speed ranges from subsonic to supersonic to hypersonic. Our proposed program addresses this time-critical technology development item by providing a new meshing code to address high Reynolds number viscous flow fields. Existing unstructured tetrahedral-based mesh generators cannot provide the high aspect ratio meshed needed for solvers such as our FEFLO and NASA's FUN3D. The software to be provided here is a next generation computation capability for design and analysis of these new space vehicles.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The software system resulting from this program can be applied to DoD programs involving predicting and understanding fluid dynamic environments, designing flight hardware, test planning and analyzing test data. Such an overall system can be applied to the design and development of missiles for defensive interceptor systems which involve blast dynamics, impact and fragmentation. This system can be applied in the analysis of foreign missile concepts and threats. Example commercial industries and applications are: Analysis of nuclear blast accidents from power plants: Automobile manufacturers for design of car and truck engines; Bio-Medical applications such as blood flow in elastic arteries, hearts, and air flow in lungs: Computer simulation of blast waves for use in anti-terrorists investigations: Housing design for protection from hurricanes, and tornados: Heating and air conditioning manufacturers for home units, large office complexes and automobile air conditioning systems: Solar collector systems for alternative energy development.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Simulation Modeling Environment
Structural Modeling and Tools

Form Generated on 09-18-09 10:14