Turbine stator vane segments having combined air and steam cooling circuits

US5634766A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• Francisco J. Cunha · Avon, US
• David DeAngelis · Voorheesville, US
• Theresa A. Brown · Ballston Lake, US
• Sanjay Chopra · Schenectady, US
• Victor Hugo Silva Correia · Cincinnati, US
• Daniel Ross Predmore · Clifton Park, US

Key dates

• Filing date: Mar 31, 1995
• Grant date: Jun 3, 1997
• Expiry date: Mar 31, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/60
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Turbine stator vane segments have inner and outer walls with vanes extending therebetween. The inner and outer walls are compartmentalized and have impingement plates. Steam flowing into the outer wall passes through the impingement plate for impingement cooling of the outer wall surface. The spent impingement steam flows into cavities of the vane having inserts for impingement cooling the walls of the vane. The steam passes into the inner wall and through the impingement plate for impingement cooling of the inner wall surface and for return through return cavities having inserts for impingement cooling of the vane surfaces. The trailing edge is air-cooled.