Advanced Air Data Sensing Techniques
Bogue, Rodney K. and Webb, Lannie D. (1968) Advanced Air Data Sensing Techniques. Technical Report NASA TM X-61115, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
Measurements of total air temperature on research aircraft flying at supersonic and hypersonic speeds are needed for analysis of flight data. Two types of total-temperature sensors--a resistance thermometer and a shielded thermocouple--have been flown on research aircraft by the National Aeronautics and Space Administration's Flight Research Center at Edwards, California. Total-temperature measurements made by both types of probes are subject to the following basic errors: (1) conduction, (2) radiation, and (3) recovery factor uncertainty. As the flight testing of research aircraft has progressed to higher Mach numbers, these basic errors in total-temperature measurements have also grown larger. Furthermore, the structural integrity of both types of probes becomes marginal as Mach numbers above 5 are attained in atmospheric flight. In an attempt to reduce the measurement errors in total temperature at Mach numbers greater than 1 and to improve the structural integrity of sensors at high Mach numbers, other less conventional total-temperature sensors are being investigated.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Flight tests, Fluid flow, Hypersonic aircraft, Temperature measuring instruments, X-15 aircraft |
| Subjects: | Aircraft/Project: X-15 (31 - 39) Engineering: (35) Instrumentation and Photography |
| ID Code: | 827 |
| Deposited On: | 27 March 2006 |
| Additional Information: | 33 pages. |
