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Novel Fragment Aerodynamic Models over Entire Velocity and Altitude Range

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: W91260-09-C-0020
Agency Tracking Number: B073-016-0189
Amount: $489,995.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: MDA07-016
Solicitation Number: 2007.3
Solicitation Year: 2007
Award Year: 2009
Award Start Date (Proposal Award Date): 2009-06-03
Award End Date (Contract End Date): 2011-06-03
Small Business Information
20 New England Business Center
Andover, MA 01810
United States
DUNS: 073800062
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Hartmut Legner
 Principal Research Scient
 (978) 689-0003
Business Contact
 B. David Green
Title: President & CEO
Phone: (978) 689-0003
Research Institution

A novel methodology has been developed to predict both the steady and unsteady aerodynamic characteristics of complex fragment shapes resulting from the impact of Missile Defense Agency (MDA) interceptors with target vehicles. The particularly innovative unsteady force coefficient model provides for the calculation of fluttering, tumbling, and chaotic tumbling of fragments utilizing a rotational lift term in the aerodynamics model. This capability satisfies an important requirement of dispersion analysis: to understand the tumbling behavior that most fragments undergo. The steady flow model combines free molecular flow modeling with continuum models using flight-data derived bridging functions. The tumbling and steady descent models are being organized into a software package that will be seamlessly implemented into the Kinetic Impact Debris Distribution (KIDD) code. Model validation will be acquired using fragment drop tests and actual flight-test data.

* Information listed above is at the time of submission. *

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