Accession Number : ADA300983

Title :   Evaluation of Three Thermal Protection Systems in a Hypersonic High-Heating-Rate Environment Induced by an Elevon Deflected 30 deg.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Taylor, Allan H. ; Jackson, L. R. ; Weinstein, Irving

PDF Url : ADA300983

Report Date : DEC 1977

Pagination or Media Count : 41

Abstract : Three thermal protection systems proposed for a hypersonic research airplane were subjected to high heating rates in the Langley 8-foot high-temperature structures tunnel. Metallic heat sink (Lockalloy), reusable surface insulation, and insulator-ablator materials were each tested under similar conditions. The specimens were tested for a 10-second exposure on the windward side of an elevon deflected 300. The metallic-heat-sink panel exhibited no damage; however, the reusable-surface-insulation tiles were debonded from the panel and the insulator-ablator panel eroded through its thickness, thus exposing the aluminum structure to the Mach 7 environment. (MM)

Descriptors :   *ALUMINUM ALLOYS, *HEAT SHIELDS, *AERODYNAMIC HEATING, *HYPERSONIC AIRCRAFT, *HEAT RESISTANT MATERIALS, *THERMAL INSULATION, HIGH TEMPERATURE, IMPACT STRENGTH, COMBUSTORS, EROSION, PAINTS, MACH NUMBER, HYPERSONIC FLIGHT, THERMOCOUPLES, HEAT SINKS, THERMAL RESISTANCE, ABLATIVE MATERIALS, PITTING.

Subject Categories : Aerodynamics
      Research and Experimental Aircraft
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE