Physics-Based Pneumatic Hammer Instability Model

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNM06AA61C
Agency Tracking Number: 053964
Amount: $69,974.00
Phase: Phase I
Program: SBIR
Awards Year: 2006
Solicitation Year: 2005
Solicitation Topic Code: X7.02
Solicitation Number: N/A
Small Business Information
140 Intracoastal Pointe, Suite 301, Jupiter, FL, 33477-5094
DUNS: 04815
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Philip Pelfrey
 Principal Investigator
 (561) 746-3317
Business Contact
 James Brostmeyer
Title: Operations Chief
Phone: (561) 746-3317
Research Institution
Florida Turbine Technologies (FTT) proposes to conduct research necessary to develop a physics-based pneumatic hammer instability model for hydrostatic bearings operating in a compressible fluid. The innovation of the resulting model is to account for the extreme density, compressibility, and non-uniform pressure variations found in highly turbulent rocket engine liquid hydrogen turbopump hydrostatic bearings as well as the variations resulting from 3-D effects such as tangential and/or axial injection, which are ignored in the pneumatic hammer instability criteria currently used throughout industry. The ability to accurately predict the stability of highly turbulent, highly compressible liquid hydrogen hydrostatic bearings incorporating 3-D effects is essential for NASA to achieve IHPRPT objectives through the use of smaller, faster turbopumps. This project will enable the accurate prediction of bearing stability, resulting in higher performing bearings that enable smaller operating clearances for improved turbopump and system-level performance.

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

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