A CALORIMETER FOR MEASURING THE LOW TEMPERATURE HEMISPHERICAL EMISSIVITY OF METALLIC AND CERAMIC SURFACES.

Abstract

An apparatus was designed, constructed, and calibrated for the measurement of the hemispherical emissivity of metallic and ceramic surfaces at temperatures down to 60K. The technique is based upon the measurement of the rate of evaporation of liquid helium to determine the heat flux. Accuracy of the apparatus was determined to be =3 percent based upon a calibration using known heat inputs. Data are presented for an aluminum honeycomb structure and alumina. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1964
Accession Number
AD0607209

Entities

People

  • Gerard L. Haury

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Aluminum
  • Calibration
  • Calorimeters
  • Emissivity
  • Evaporation
  • Heat Energy
  • Heat Flux
  • Honeycomb Structures
  • Low Temperature
  • Measurement
  • Measuring Instruments
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Atmospheric Remote Sensing.
  • Thin Film Deposition Science.