Thermal analysis system 1 - User's manual
J. A. Hultberg, P. F. O’Brien · NASA STI Repository (National Aeronautics and Space Administration) · 1971
A computer program (Thermal Analysis System I) was written to calculate steady-state temperatures for a radiation-conduction-coupled constant-property thermal model.A two-region spectral analysis is provided for the radiation portion of the computation.The "script 8" technique is used for infrared heat transfer and the radiosity technique is used for solar heat input.The program is designed for maximum ease of use from the user's standpoint.The rules for order and placement of user input data to the program are almost free-form.The output is formatted for ease of user understanding and diagnosis of errors.Some user control of output is provided. T 32-1476Development of a temperature control system to maintain the various subsystems of a space vehicle within the proper temperature limits requires an understanding of the thermal properties of the components, the thermal coupling between the components themselves, and the coupling from the components to the surrounding environment.The Thermal Analysis System I (TAS I) is designed as an easy-to-use digital computeT program for thermal design analysis.It fills the gap between "back of the envelope calculations" and computer codes that require complex user input and is useful in two ways: (1) it may be used when a problem does not justify, or time does not permit, an analysis requiring a complex computer program; or (2) it may serve as a stepping-stone to more complex thermal analysis programs.The thermal analyst who is accustomed to working with complex thermal analysis programs and their input formats probably would not save much time by using TAS I.It is intended mainly for use as a design tool by the temperature control engineer who performs thermal analysis for system design, and should be heIpfuI for this purpose because the program coding is simplified and the input rules are easy to use and remember.The output is formatted for ease of user understanding and diagnosis of errors.1108 (EXEC 2), UNIVAC 1108 (EXEC 3), and CDC 6400.The code is written so that no changes are necessary in the FORTRAN statements when switching from one machine to another.The executive control cards must, of course, be changed from one computer installation to another, but this should offer no difficulty because conversions from the IBM 7094 to other machines have been easily accomplished by users without the aid of the author.Although some character recognition is used in the program, it is done in such a manner that the program remains word-length-independent.The TAS I physical program has been submitted to COSMIC,* the NASA agency for general distribution.A listing of the source program is given in the Appendix.