Weapons System Flow Separation

Award Information
Agency: Department of Defense
Branch: Army
Contract: W31P4Q-11-C-0191
Agency Tracking Number: A103-149-0111
Amount: $69,992.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: A10-149
Solicitation Number: 2010.3
Small Business Information
6210 Kellers Church Road, Pipersville, PA, -
DUNS: 929950012
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Sanford Dash
 President&Chief Scientist
 (215) 766-1520
 dash@craft-tech.com
Business Contact
 Brian York
Title: Treasurer&Principal Scientist
Phone: (215) 766-1520
Email: york@craft-tech.com
Research Institution
 Stub
Abstract
This proposal deals with the extension of physics in CFD codes to permit their more accurate and reliable analysis of transient missile jet/exhaust interactions. Such interactions include those associated with divert jet firings and with stage-separation, and their analysis is complicated by the significant role played by transitional turbulence effects, which impacts both the size and the oscillatory behavior of the separation region produced by the interaction, and thus impacts stability and control. The turbulent/transitional physics varies with flight regimes and the modeling required will be scoped-out via the performance of a substantive number of numerical studies. A detailed direct simulation (DNS) study will be performed for a divert jet firing on generic missile at 45 km and Mach 8 which will directly deal with the transitional physics. An AIT missile tested in the shock tunnel facilities at CUBRC with a DAC divert motor will also be analyzed for which detailed temporal data is available. Innovative techniques to minimize the size of the separated region and the oscillatory behavior will be examined employing pulsatile concepts with prescribed frequencies. Active control concepts which have been used for related problems will be discussed but the work deferred to Phase II.

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

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