METHOD OF MEASURING THERMAL DIFFUSIVITY AND SPECIFIC HEAT OF AN ABLATING BODY
Abstract
A method is presented for measuring thermal properties of a material as functions of temperature. The heat capacity per unit volume is determined by measuring the temperature rise of an adiabatically heated sample. Adiabatic conditions are produced by employing uniformly distributed heat sources in a model composed of the material. Thermal conductivity and thermal diffusivityARE DETERMINED BY COMBINING RESULTS OF THIS MEASUREMENT WITH AN ABLATION TEST ON A BAR OF THE MATERIAL. An oxyacetylene torch was found capable of producing a rate of ablation of 0.02 cm/sec for a melamine-bound glass-cloth laminate. A one-dimensional steady-state thermal layer is soon established. A method is also described for obtaining an effective value of the thermal diffusivity from the ablation test alone. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 11, 1961
- Accession Number
- AD0267655
Entities
People
- J.m. Kendall
Organizations
- Naval Ordnance Laboratory