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Skin Friction Measurement Technology for Underwater Applications

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
Innovative Scientific Solutions, Inc.
7610 McEwen Rd. Dayton, OH 45459-
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2011
Title: Skin Friction Measurement Technology for Underwater Applications
Agency / Branch: DOD / NAVY
Contract: N00014-11-C-0468
Award Amount: $495,290.00


The measurement of skin friction on hydrodynamic surfaces at high Reynolds numbers is essential validation of computational models and design of advanced maneuvering systems. In this proposal we introduce an optical sensor for measurements of mean skin friction on large models that operates in water. This sensor is based on the diffusion of a fluorescent dye from a polymer film into the water, a mass transfer sensor. Mass transfer is determined by monitoring the rate of dye diffusion from the film and applying a numerical model to the transient mass transfer process. This technique has been demonstrated qualitatively by detecting flow separation and reattachment on an airfoil model in the 12-inch water tunnel at Penn State University. Quantitative measurements of skin friction were conducted on a turbulent boundary layer with a Reynolds number of over 7-million. These results indicated an absolute accuracy of the system was better that 8%. In the Phase II effort, a captive model data acquisition system will be designed and tested. The focus of the program is to deploy the system in the NSWC tow tanks for testing on large models.

Principal Investigator:

Jim Crafton
Supreme Commander
(937) 429-4980

Business Contact:

Larry Goss
(937) 429-4980
Small Business Information at Submission:

Innovative Scientific Solutions, Inc.
2766 Indian Ripple Rd Dayton, OH -

EIN/Tax ID: 311437643
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No