Integrated Component and System Analyses of Instabilities in Test Stands

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX09CF83P
Agency Tracking Number: 080055
Amount: $99,961.00
Phase: Phase I
Program: STTR
Awards Year: 2009
Solitcitation Year: 2008
Solitcitation Topic Code: T10.01
Solitcitation Number: N/A
Small Business Information
Combustion Research and Flow Technology
6210 Keller's Church Road, Pipersville, PA, 18947-1020
Duns: 929950012
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Vineet Ahuja
 Principal Investigator
 () -
 vineet@craft-tech.com
Business Contact
 Paula Schachter
Title: Business Official
Phone: (215) 766-1520
Email: schachte@craft-tech.com
Research Institution
 University of Florida
 Not Available
 339 Weil Hall
Gainesville, FL, 32611
 (352) 846-3017
 Federally funded R&D center (FFRDC)
Abstract
Instabilities associated with fluid handling and operation in liquid rocket propulsion systems and test facilities usually manifest themselves as structural vibrations and may cause structural damage such as the cracks observed in the space shuttle hydrogen feed liners. While the source of the instability is directly related to the performance of a component such as a turbopump, valve or a flow control element, the associated pressure fluctuations as they propagate through the system have the potential to amplify and resonate with natural modes of the structural elements and components of the system. The innovation described in this proposal directly relates to an innovative multi-level approach that involves integration of analysis, at both the component and systems level, into a unified simulation framework. The primary source of the unsteadiness is modeled with a high-fidelity hybrid RANS/LES based CFD methodology that has been previously used to study instabilities in feed systems. System response to the driving instability will be simulated through a lumped element modeling (LEM) technique that will approximate the behavior of all the distributed elements that constitute the system.

* information listed above is at the time of submission.

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