Aerodynamic Heating of Miniature Bead Thermistor Thermometers in a Rarified Airstream

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  • 1 New Zealand Meteorological Service, Wellington
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Abstract

The recovery factors of miniature bead thermistors as used in meteorological rocketsondes were measured at subsonic Mach numbers using a whirling arm device inside a vacuum chamber. Measured values were near 0.75 at sea level pressure and remained relatively constant with pressure up to a pressure altitude of about 30 km. Above a pressure altitude of 40 km the recovery factors steadily increased with altitude and at 65 km values between 1.10 and 1.45 were recorded.

Abstract

The recovery factors of miniature bead thermistors as used in meteorological rocketsondes were measured at subsonic Mach numbers using a whirling arm device inside a vacuum chamber. Measured values were near 0.75 at sea level pressure and remained relatively constant with pressure up to a pressure altitude of about 30 km. Above a pressure altitude of 40 km the recovery factors steadily increased with altitude and at 65 km values between 1.10 and 1.45 were recorded.

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