Kinetic Boltzmann Turbulence Method For Improved Predictions of High Energy Beam Quality

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$100,000.00
Award Year:
2004
Program:
SBIR
Phase:
Phase I
Contract:
HQ0006-04-C-7008
Award Id:
69534
Agency Tracking Number:
B041-020-0015
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
555 Sparkman Dr., Suite 1612, Huntsville, AL, 35816
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
928516442
Principal Investigator:
LawrenceSpradley
Vice President
(256) 721-1769
lws@hiwaay.net
Business Contact:
LawrenceSpradley
Vice President
(256) 721-1769
lws@hiwaay.net
Research Institute:
n/a
Abstract
ResearchSouth will develop a software product for predicting the effects of turbulent boundary layers and separated regions for analysis and design of defensive missile systems. The basis of the predictive tool is a breakthrough methodology for turbulent compressible aerodynamic flow computation using a kinetic model with the Boltzmann equation. This is an entirely new and different approach from typical Navier-Stokes methods with turbulence modeling which have difficulty producing accurate results. In our Phase I effort, we will formulate turbulence as a collision model in the Boltzmann equation using turbulent eddies as the distribution function. The collision source term will be evaluated by relaxation from an equilibrium state using a computed turbulent length scale. The solution of this model will be the number density distribution of the turbulent eddies. By taking moments of the Boltzmann solutions - the macroscopic flow field quantities, velocity, density, pressure, temperature, and the turbulent viscosity, and length scales are obtained. We will use existing ResearchSouth software for geometry definition, spatial meshing and equation solution. We will then link the turbulent flow results to relevant BMD design issues, such as nozzle flow, external aerodynamic coefficients, and aero-optics effects relevant to airborne lasers and endo-atmospheric interceptors.

* information listed above is at the time of submission.

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