Aeroheating Flight Instrumentation
Project Title:Aeroheating Flight Instrumentation
Huntsville, AL 35805
Principal Investigator:Bancroft, S. A.
The current inventory ofinstruments to measure aerodynamic heating during supersonic
and hypersonic flight of a space vehicle is extreme limited. The evaluation of the
heat data measured by Schmidt - Boelter and Gordon calorimeters has pointed out the
large errors inherent to these instruments due to a phenomena called the temerature
mismatch error. This error is basically caused by large surface temperature gradients
between the calorimeter face and the upstream surface. An empirical method developed
in 1961 to estimate this errfor for two dimensional undisturbed low was used to correct
the Shuttle flight data. This method provides, at best, an estimate for correcfting
the flight data especially in three dimensional and highly disturbed flwo. The objective
of the Phase I study is to develop and anyalyze conceptual designs that eliminate
the temperature mismatch error. The best concept would then be designed, fabricated,
tested and verified during the Phase II study.