Gas turbine engine rotor or casing with high or low emissivity surface finish

Gas turbine rotors 34, 36 have high 44, 50 emissivity surface finishes on portions of their surfaces. Rotor support structures 112, 120, casings 130, casing cooling duct 134 and core casings 138 also have high emissivity surfaces, encouraging heat radiation therefrom. Bearing chamber 122 has a low e...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	ALAN RICHARD JONES
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Gas turbine rotors 34, 36 have high 44, 50 emissivity surface finishes on portions of their surfaces. Rotor support structures 112, 120, casings 130, casing cooling duct 134 and core casings 138 also have high emissivity surfaces, encouraging heat radiation therefrom. Bearing chamber 122 has a low emissivity finish to reduce heat radiation into the bearing. Temperature differentials between upper and lower engine portions are reduced, reducing rotor bowing and minimising rotor vibrations during warm engine start. Low emissivity finishes on downstream surfaces reduce axial heat transfer (Fig. 3) from hot turbine to cooler engine parts and protect joints (Fig. 4) form the effects of bowing. High emissivity finishes include: metal oxides formed on or applied to the component, carbon or paint; low emissivity surfaces: polished metal (silver, gold, chromium, nickel), oxides or machining (grinding, turning).