HEAT TRANSFER CONSIDERATIONS IN THE TEMPERATURE CONTROL OF INSTRUMENTATION PACKAGES AT HIGH ALTITUDES.
AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
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A theoretical method for designing thermal packages used to house instrumentation carried aloft by high-altitude balloon vehicles was developed. Because of the odd package shapes and the constantly varying boundary conditions, a numerical method of analysis was employed for the solution of the heat transfer equations. This approach allows the consideration of all pertinent variables, but its complexity requires a large number of computations. Accordingly, the problem was programmed for solution on a high-speed electronic digital computer. The computer program was initially written for a rectangular parallel package. Temperature distributions calculated from the flight-simulation program were compared to temperature distributions measured on actual balloon flights. It was concluded that the method developed is a reliable one. Author