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Methods of Measurement of High Air Velocities by the Hot-wire MethodInvestigations of strengths of hot wires at high velocities were conducted with platinum, nickel, and tungsten at approximately 200 Degrees Celcius hot-wire temperature. The results appear to disqualify platinum for velocities approaching the sonic range; whereas nickel withstands sound velocity, and tungsten may be used for supersonic velocities under standard atmospheric conditions. Hot wires must be supported by rigid prolongs at high velocities to avoid wire breakage. Resting current measurements for constant temperature show agreement with King's relation.
Document ID
19930090557
Acquisition Source
Legacy CDMS
Document Type
Other - NACA Technical Note
External Source(s)
hdl:100.2/ADA800632
Authors
Weske, John R. (Case School of Applied Science)
Date Acquired
September 6, 2013
Publication Date
February 1, 1943
Subject Category
Aerodynamics
Report/Patent Number
NACA-TN-880
Accession Number
93R19847
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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