Science objectives and performance of a radiometer and window design for atmospheric entry experiments

Details Science objectives and performance of a radiometer and window design for atmospheric entry experiments Science objectives and performance of a radiometer and window design for atmospheric entry experiments

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9512190c&link_type=abstract

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Computer Science

Performance

Aerodynamic Heating, Atmospheric Entry, Heat Measurement, Radiative Heat Transfer, Radiometers, Stagnation Point, Windows (Apertures), Aeroassist, Far Ultraviolet Radiation, Nonequilibrium Radiation, Reentry Vehicles, Shock Layers

Scientific paper

This paper describes the techniques developed for measuring stagnation-point radiation in NASA's cancelled Aeroassist Flight Experiment (AFE). It specifies the need for such a measurement; the types and requirements for the needed instruments; the Radiative Heating Experiment (RHE) developed for the AFE; the requirements, design parameters, and performance of the window developed for the RHE; the procedures and summary of the technique; and results of the arc-jet wind tunnel experiment conducted to demonstrate the overall concept. Subjects emphasized are the commercial implications of the knowledge to be gained by this experiment in connection with the Aeroassisted Space Transfer Vehicle (ASTV), the nonequilibrium nature of the radiation, concerns over the contribution of vacuum-ultraviolet radiation to the overall radiation, and the limit on the flight environment of the vehicle imposed by the limitations on the window material. Results show that a technique exists with which the stagnation-point radiation can be measured in flight in an environment of interest to commercial ASTV applications.

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