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Weapons System Flow Separation

Award Information

Department of Defense
Award ID:
Program Year/Program:
2011 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Combustion Research and Flow Technology, Inc.
6210 Kellers Church Road Pipersville, PA 18947-1020
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2011
Title: Weapons System Flow Separation
Agency: DOD
Contract: W31P4Q-11-C-0191
Award Amount: $69,992.00


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.

Principal Investigator:

Sanford M. Dash
President&Chief Scientist
(215) 766-1520

Business Contact:

Brian J. York
Treasurer&Principal Scientist
(215) 766-1520
Small Business Information at Submission:

Combustion Research and Flow Technology, Inc.
6210 Kellers Church Road Pipersville, PA -

EIN/Tax ID: 232759059
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No