Unstructured Fixed Grid with Moving Body, Navier-Stokes Computational Fluid Dynamic (CFD) Solver for Simulating Gas Flows

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N00178-05-C-3045
Agency Tracking Number: 044-0003
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: MDA04-136
Solicitation Number: 2004.4
Small Business Information
PRATT & MILLER ENGINEERING & FABRICATION
149 Plantation Ridge Road, Suite 170, Mooresville, NC, 28117
DUNS: 040707460
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Robinson
 President
 (704) 799-6944
 drobinson@corvidtec.com
Business Contact
 David Robinson
Title: President
Phone: (704) 799-6944
Email: drobinson@corvidtec.com
Research Institution
N/A
Abstract
The development of a generalized moving body capability for Computational Fluid Dynamics (CFD) flow simulations of highly transient flowfields is critical to system analyses of Divert and Attitude Control Systems (DACS) for Kinetic Warheads (KWs). Testing capabilities are limited in the DACS operating regime; therefore, computational tools are essential for such analyses. The flow in the DACS itself is characterized by high temperatures with extremely tight geometric clearances. These constraints make standard moving-grid techniques ineffective due to numerical stability constraints, cell collapse from body impact, cell impingement, and body pass-through difficulties. This proposal describes a novel technique that will allow for a generalized moving body capability within an unstructured fixed-grid (UFG) Navier-Stokes CFD flow solver. This approach will allow for an accurate solution on the fixed components as well as a full duty-cycle analysis of the valves. In addition, the time required for grid generation will be drastically reduced, thereby improving solution turnaround times. While the approach is directly applicable to Sea Based Midcourse ballistic missile defense, the solver developed could be widely applied to military and commercial applications where moving components or relative body motion is critical.

* information listed above is at the time of submission.

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