Adjoint-Based Design Software Using Adaptive Finite Element Methods

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NAS4-02041
Agency Tracking Number: 012089
Amount: $600,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
ResearchSouth, Inc.
555 Sparkman Dr. Suite 1612, Huntsville, AL, 35816
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Lawrence Spradley
 Principal Investigator
 (256) 721-1769
Business Contact
 Lawrence Spradley
Title: Business Official
Phone: (256) 721-1769
Research Institution
ResearchSouth has developed a powerful design optimization algorithm using an adjoint-based methodology for advanced aerospace vehicles including the airframe aerodynamic shape and the integrated propulsion system. The significance is that this algorithm separates the geometric entities from the optimization process allowing an independent linkage with many CAD packages and at much lower cost. All objectives have been met for the Phase I project. A computer software package, termed SAMdesign, now has the capability to solve the three-dimensional Euler equations, solve the adjoint of the Euler equations, and change the vehicle shape subject to constraints. All of these solutions are performed on unstructured tetrahedral meshes using a Finite Element based numerical algorithm. Four test cases have been successfully computed including a generic aerospace vehicle. Phase II will include multi-disciplinary effects, coupled physics for aerodynamics / propulsion / structures, fast finite element meshing methods, and will develop the software into a production package. Extensive verification and validation will be done on NASA configurations. The product will be documented, delivered and installed at NASA with a user-training course given. This will provide NASA with a powerful software tool to perform very efficient and rapid design assessment of evolving next generation space vehicles.

* information listed above is at the time of submission.

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