THICK FILM THERMOCOUPLE GAUGES FOR ROUGHENED MODEL HEAT FLUX MEASUREMENTS
Abstract
The study of wall roughness effects on model heat transfer in high Reynolds number shock tunnel flows of a few milliseconds duration requires the use of a rugged, fast-response calorimeter of known surface roughness. Models constructed of continuous thin copper sheeting over a solid insulator substrate with rear thermocouples attached were developed for this purpose. The surface of the copper can be roughened as required and thus forms both an unbroken model surface segment and a heat flux calorimeter. Conditions of heat flux and tunnel test time under which the gauge is useful are shown by analysis. Results from calibration experiments and shock tunnel tests are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1969
- Accession Number
- AD0697962
Entities
People
- Keith E. Starner
- Robert L. Varwig
Organizations
- The Aerospace Corporation