Accession Number:

AD0720726

Title:

Velocity Distributions of Several Gases Scattered from High Temperature Surfaces,

Descriptive Note:

Corporate Author:

PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s):

Report Date:

1971-02-01

Pagination or Media Count:

19.0

Abstract:

Polycrystalline surfaces of molybdenum, tungsten and rhenium at temperatures up to 2600K were exposed to free molecule flows of hydrogen, helium, nitrogen, oxygen and argon at Mach numbers up to 4 from a room temperature source. Time-of-flight measurements were made for molecules reflected in the surface normal direction. Apparent translational accommodation coefficients ranged from .01 for hydrogen on a hot surface to nearly unity for all gases on surfaces at room temperature. Author

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE