Elastic Films for Cyrogenic Skin Friction Measurements

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,982.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
NNX09CC92P
Award Id:
90592
Agency Tracking Number:
084154
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2766 Indian Ripple Road, Dayton, OH, 45440
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
884812025
Principal Investigator:
Dr. JimCrafton
Principal Investigator
(937) 429-4980
jwcrafton@innssi.com
Business Contact:
LarryGoss
Business Official
(937) 429-4980
gosslp@innssi.com
Research Institute:
n/a
Abstract
Here we introduce a new sensor for measurement of skin friction and pressure, Surface Stress Sensitive Film (S3F). This technique can operate over a range of temperatures from cryogenic (160 K, -113ýýaC) to well above ambient (470 K, 197ýýaC). The operation of the sensor is based on the deformations of an elastic film that distorts under the action of the applied normal and tangential loads. Skin friction and pressure gradients are determined by monitoring these distortions and applying a finite element model to the film. Quantitative measurements of skin friction and pressure have been demonstrated on aerodynamic models from 10-m/s to Mach 5. Among these tests was an experiment that included S3F on one side of the model and PSP on the other side. Data from each sensor was acquired simultaneously, thus demonstrating the compatibility of the S3F with existing PSP hardware. Tunnels with existing PSP systems could be upgraded to include skin friction capability. The opportunity to develop this sensor system for measurements of skin friction in production facilities, including cryogenic tunnels as well as tunnels with operating temperatures up to 200C, is recognized and this is the focus of this proposal.

* information listed above is at the time of submission.

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