Accession Number : AD0851479

Title :   Development and Experimental Verification of a Computer Program for Predicting Temperature Distribution and Heat Transfer through Coated and Uncoated, Single or Multi-Glaze Window Systems.

Descriptive Note : Final technical rept. 15 Jun 66-15 Feb 69,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Korb, Gary M. ; Dayton, Ronald D. ; Sommerville, Duncan

Report Date : APR 1969

Pagination or Media Count : 201

Abstract : The severe thermal environment of future hypervelocity aerospace vehicles will place rigorous demands on direct vision window system. At the high temperatures encountered, heat will be transferred within window materials by both conduction and radiation. This report describes the development and experimental verification of a computer program for predicting the temperature distribution and heat transfer through coated and uncoated, single or multiple glaze window systems. The heat balance equations in the computer program account for emission, attentuation, and absorption of radiant energy within the glaze. Reflection and transmission of glaze surfaces having multilayer, thin-film coatings are computed. Window temperatures and heat flux can be predicted for transient conditions of individual and/or combined convective and radiative heating. The computer program was experimentally verified with heat transfer tests in which specimens of various glaze materials and thicknesses were used. Typical aerospace reflection and antireflection coatings were employed on one and/or both surfaces of the test specimens. The work was performed in three phases. In the first phase the research was applicable to single uncoated glazes. In the second phase the scope was expanded to include coated single glazes, and in the third phase coated and uncoated multiple glazes were investigated. Good agreement between the analytical and experimental results was obtained. The computer program is written in FORTRAN IV language for the IBM 7094 digital computer. (Author)

Descriptors :   *HEAT TRANSFER), (*HYPERSONIC AIRCRAFT, WINDSHIELDS), (*TRANSPARENT PANELS, COMPUTER PROGRAMMING, MANNED SPACECRAFT, COATINGS, AERODYNAMIC HEATING.

Subject Categories : Ceramics, Refractories and Glass
      Computer Programming and Software
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE