Accession Number:

ADA533011

Title:

Optical Measurements of Pressure and Shear on a Strut in Supersonic Flow (Postprint)

Descriptive Note:

Conference paper

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION SCIENCES BRANCH

Report Date:

2009-08-01

Pagination or Media Count:

11.0

Abstract:

To quickly vet candidate strut geometries, as well as build a database for computational validation, a series of struts was constructed and investigated with optical sensors for pressure, velocity, and skin friction. This paper reports the results of pressure and skin friction measurements on the strut surface using Pressure-Sensitive Paint PSP and Surface Stress Sensitive Films S3F. PSP is an optical sensor that provides continuous distributions of pressure on a model surface. The paint on the surface is doped with a luminescent dye that is sensitive to the partial pressure of oxygen, and thus luminescent intensity is a function of pressure. S3F is a new skin friction sensor based on an elastic polymer film that deforms under the action of applied normal and tangential loads. Skin friction is determined by monitoring these deformations, and then solving an inverse problem using a finite element model of the elastic film.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Optical Detection and Detectors
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE