Physics-Based Pneumatic Hammer Instability Model

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNM07AA21C
Agency Tracking Number: 053964
Amount: $599,763.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
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
 PPelfrey@fttinc.com
Business Contact
 Lloyd Mazer
Title: Business Official
Phone: (561) 746-3317
Email: lmazer@fttinc.com
Research Institution
N/A
Abstract
The objective of this project is to develop a physics-based pneumatic hammer instability model that accurately predicts the stability of hydrostatic bearings operating in a turbulent, compressible fluid. In phase 2, the rig will be fabricated and assembled, design of experiment will be executed. The empirical data will be used to determine if a particular variable, or input parameter, was a contributor to pneumatic hammer instability. If not, the variable is eliminated. If the variable is determined to be a contributor, it is non-dimensionalized and included in the equations of motion to develop a physics-based stability criteria. The resulting criteria will then be validated using test data. If the criteria is not validated, a gap assessment will be completed and the process is repeated. Once the criteria is validated, it is implemented.

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

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