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Radant Heating Simulation
AVCO CORP WILMINGTON MA RESEARCH AND DEVELOPMENT DIV
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A review is presented of the radiation energy transfer rates characteristic of the environments for advanced entry missions, and of the techniques suitable for simulating these heat transfer rates in the laboratory. The most promising techniques for laboratory simulation of advanced radiation environments appear to be those associated with the continuous arc discharge. Radiation fluxes which are characteristic of advanced manned reentry environments, can be obtained by direct exposure of material specimens to an arc column. Radiation lamps can produce heat fluxes of the order of 1 to 2 kwsq cm. Outstanding problems pertain to the quantitative prediction of radiation environments, characteristic of flight speeds greater than 45,000 ftsec, determination of the effect of different spectral radiation distributions on material behavior, determination of the effect of variations in the ratio of convective to radiative heat transfer on material behavior, and the design of efficient optical systems for high power 100 kw to 1 megawatt radiation lamps.
APPROVED FOR PUBLIC RELEASE