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Measurements of Heat-Transfer and Friction Coefficients for Helium Flowing in a Tube at Surface Temperatures up to 5900 Deg RMeasurements of average heat transfer and friction coefficients and local heat transfer coefficients were made with helium flowing through electrically heated smooth tubes with length-diameter ratios of 60 and 92 for the following range of conditions: Average surface temperature from 1457 to 4533 R, Reynolds numbe r from 3230 to 60,000, heat flux up to 583,200 Btu per hr per ft2 of heat transfer area, and exit Mach numbe r up to 1.0. The results indicate that, in the turbulent range of Reynolds number, good correlation of the local heat transfer coefficients is obtained when the physical properties and density of helium are evaluated at the surface temperature. The average heat transfer coefficients are best correlated on the basis that the coefficient varies with [1 + (L/D))(sup -0,7)] and that the physical properties and density are evaluated at the surface temperature. The average friction coefficients for the tests with no heat addition are in complete agreement with the Karman-Nikuradse line. The average friction coefficients for heat addition are in poor agreement with the accepted line.
Document ID
19660081713
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
External Source(s)
doi:10.2514/8.5244
Authors
Taylor, Maynard F. (NASA Lewis Research Center Cleveland, OH, United States)
Kirchgessner, Thomas A. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 3, 2013
Publication Date
June 8, 1959
Publication Information
Publication: American Rocket Society Journal
Volume: 30
Issue: 9
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
NASA-TM-X-57139
ARS PAPER-850-59
GRC-E-DAA-TN43549
Meeting Information
Meeting: American Rocket Society Semi-Annual Meeting
Location: San Diego, CA
Country: United States
Start Date: June 8, 1959
End Date: June 11, 1959
Sponsors: American Rocket Society
Accession Number
66N81187
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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