THE HEAT BARRIER,
Abstract
In a discussion of the heat barrier, the author first explains how this heat is produced. He notes that the problem was first discovered by the Germans in their experiments with V-2 rockets. He then describes the methods used to solve the problem. There are essentially two approaches to carry away the heat: by absorption and by radiation. The absorption techniques include: (1) Cooling by convection; the aircraft or rocket has a double wall with a gas or a liquid cooling agent in between to absorb the heat; (2) Cooling by evaporation; liquid is ejected from tiny holes punched in the wall of the aircraft; (3) Cooling by conduction; a thick shield is used and the heat is conducted away; (4) The burnout device; a protective layer is mounted on the craft; high temperature melts and burns this layer or starts a chemical reaction which absorbs large quantities of heat. The radiation technique uses an insulator which has a high radiation power. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 21, 1967
- Accession Number
- AD0674396
Entities
People
- Wei Yeh
Organizations
- National Air and Space Intelligence Center