Publication Date:
2019-06-27
Description:
The aerodynamic suitability of Freon-12 for general wind-tunnel testing was investigated at low and high subsonic speeds. Static aerodynamic characteristics of two transport airplane models were determined from strain gage balance measurements in both air and Freon-12 at several Reynolds numbers. A low-speed high-lift configuration was evaluated at Mach number 0.25, and a high-speed cruise wing-fuselage combination was tested at Mach numbers up to 0.825. The data obtained in air and in Freon-12 agree well, even in stalled flow, until compressibility effects evidently become significant in air and in Freon-12 agree well, even in stalled flow, until compressibility effects evidently become significant in air.
Keywords:
FACILITIES, RESEARCH, AND SUPPORT
Type:
NASA-TM-X-67417
,
AGARD Facilities and Tech. for Aerodyn. Testing at Transonic Speeds and High Reynolds Number; 8 p
Format:
text
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