Accession Number : AD0865531

Title :   Evolution of the NWC Thermal Standard. Part 1. Concept.

Descriptive Note : Rept. for 16 Dec 68-1 Oct 69,

Corporate Author : BRIGHAM YOUNG UNIV PROVO UT

Personal Author(s) : Ulrich, Richard D.

Report Date : FEB 1970

Pagination or Media Count : 40

Abstract : The concept for a thermal standard, which can be used to collect data on the effects of 'thermal forcing functions', has been formulated. The analytical formulation of this complex heat transfer problem is given. Ten different types of boundary conditions or 'thermal forcing functions' are considered. Parameters considered are: the time constant (an indicator of time to reach steady state), 'radiant forcing function' (an indicator of steady temperature excess above ambient), a frequency parameter (relating the cyclic nature of diurnal heating and cooling to convective heating and cooling), and effective thickness (relating actual radius to effective energy storage thickness) which allows calculation of an effective time constant for large real bodies subject to the diurnal cycle. The thermal standard should yield information necessary to predict the thermal response of ordnance placed in an environment similar to the environment experienced by the thermal standard. (Author)

Descriptors :   (*HEAT TRANSFER, STANDARDS), ORDNANCE, HEAT FLUX, HEAT TRANSFER COEFFICIENTS, PREDICTIONS, RESPONSE.

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE