Shear and Stress Sensitive Films for Near Wall Skin Friction Measurements

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-07-M-0090
Agency Tracking Number: N062-165-0849
Amount: $99,893.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: N06-165
Solicitation Number: 2006.2
Small Business Information
2766 Indian Ripple Rd, Dayton, OH, 45440
DUNS: 884812025
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jim Crafton
 Senior Engineer
 (937) 429-4980
Business Contact
 Larry Goss
Title: President
Phone: (937) 429-4980
Research Institution
The measurement of skin friction on hydrodynamic surfaces at high Reynolds numbers is essential for the design of advanced Naval technology. Knowledge of the mean and fluctuating pressure distribution and wall skin friction is essential to the design of advanced propulsion systems and evaluation of drag reduction techniques. Unfortunately, the accurate measurement of wall skin friction on complex surfaces under high Reynolds number continues to be problematic. In this proposal we introduce a new sensor for measurements of skin friction and pressure that operates in water. This sensor is based an elastic polymer film which deforms under the action of the applied normal and tangential loads. Skin friction and pressure gradients are determined by monitoring these deformations and applying a finite element model to the elastic film. Preliminary tests using this sensor at low Reynolds numbers have proven promising and therefore, the development a skin friction sensor for use on seafaring vessels is recognized. In the Phase I effort, a series of sensors will be manufactured and tested on a flat plate in the Penn State University water tunnel at Reynolds numbers of up to 9-million. Skin friction results from the new sensor will be compared to established techniques.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government