Accession Number : ADD003870

Title :   Selective Cooling of Turbine Vanes.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Memmen,Robert L

Report Date : 17 Mar 1977

Pagination or Media Count : 15

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)

Descriptors :   *Patent applications, *Gas turbine blades, *Air cooled, Selection, Vaneaxial fans, Air flow, Diaphragms, Melting point, Low temperature

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE