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

Report Date:

1977-12-01

Pagination or Media Count:

41.0

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

Subject Categories:

  • Aerodynamics
  • Research and Experimental Aircraft
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE