Selective Cooling of Turbine Vanes.
Abstract
Overheating of the vanes of a gas turbine engine is normally prevented by providing cooling holes in areas of demonstrated and anticipated need. In areas where the cooling requirement is questionable, the holes are plugged with a diaphragm of material having a controlled melting point which is determined by the desired limit of temperature rise in the area. When a hot spot occurs in the area of a plugged cooling hole, the diaphragm ruptures by melting thereby allowing cooling air to flow to the overheated region. Thus, only the air which is actually needed for cooling flows through the cooling holes leaving the maximum amount of air flow available for operation of the engine. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 17, 1977
- Accession Number
- ADD003870
Entities
People
- Robert L. Memmen
Organizations
- United States Department of the Air Force