HEAT TRANSFER IN HONEYCOMB SANDWICH PANELS
GENERAL DYNAMICS CORP FORT WORTH TX
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Accurate analytical methods are presented for predicting the heat transfer and resulting temperature distribution in both brazed and bonded honeycomb sandwich panels during transient and steady state conditions. This analysis includes the heat transfer due to conduction through the cell walls as well as the heat exchange due to radiation within the cell. Heat transfer by convection is neglible. An experimental investigation was conducted in which one surface of a honeycomb sandwich panel was heated by means of quartz radiant heaters and resulting transient temperatures of the panel skins were measured and recorded. The test specimens consisted of brazed steel, brazed titanium and bonded aluminum panels, each having a thickness of approximately 12 inch. Excellent agreement between the experimental measurements and the analytical predictions have been obtained. The results of the analytical and experimental investigations show that the heat transfer in the brazed panels is largely dependent on the thickness of brazing alloy which has accumulated on the cell walls during fabrication.
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