Accession Number:

AD0678095

Title:

HEAT TRANSFER RATE MEASUREMENTS IN A LOW DENSITY, HYPERVELOCITY STREAM OF ARGON.

Descriptive Note:

Technical note,

Corporate Author:

VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s):

Report Date:

1968-01-01

Pagination or Media Count:

36.0

Abstract:

Using the transient calorimeter gage technique, heat transfer rate measurements were made on small bodies immersed in a hypersonic stream of argon in the near-free-molecule flow regime. The measurements were carried out in a free-jet expansion with stagnation conditions, produced by an electrical arc heater, of up to 3000 degrees K stagnation temperature and 37 mm Hg stagnation pressure, giving free stream velocities of 1800 msec M greater than 12, and particle mean free paths of 0.4 cm and greater. Measurements made with 4 models 1 cm long by 0.1 cm in width, were compared and the results indicated a reduction in the energy accommodation coefficient of 15 when the angle of incidence of the free stream decreased from normal incidence to 15 degrees incidence. Author

Subject Categories:

  • Fluid Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE