ROCKET HEAT TRANSFER MEASURING DEVICES AND TECHNIQUES
ARO INC ARNOLD AFS TN
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An investigation was conducted to find suitable devices and techniques for measuring heat transfer rates in the base areas of rocket-powered missiles. A slug mass calorimeter was selected to measure total convective and radiant heat rates, and a black-body cavity was selected to measure radiant heat rates. Similar instruments have been used in past test programs however, the simplifying methods of analysis as used in the past with these instruments may result in considerable errors. The approach taken in this report was to determine the source heat rate by writing a general heat balance equation as a function of time about the heat sensing unit. An experimental program utilizing a box-type muffle furnace to achieve a known source heat rate, was conducted to determine the accuracy of the mathematical analysis used herein. The results of the experimental program illustrated that heat transfer rates may be measured with reasonable accuracy providing basic fundamentals are adhered to and good engineering practices are utilized in the instrument design. In addition, the instruments and techniques as presented in this report should, in general, apply to other testing applications.
- Fluid Mechanics