Film Cooling in Fuel Rich Environments
Abstract
The ultra compact combustor is a high performance gas turbine design concept that portends reduced weight for future weapons platforms. A natural outcome of the design is the continual presence of fuel-rich air in the turbine component of the engine. Because modern cooling schemes for hot section turbine blades involve injecting cool, oxygen-rich air adjacent to the surface, the potential arises for reaction with the unconsumed radicals in the mainstream ow and augmented heat transfer to the blade. This outcome is contrary to the purpose of lm cooling, and can lead to early life-cycle turbine failure. This study examined the e ects of multiple cooling hole geometries on downstream heat transfer. It demonstrated schemes that allow reactions to take place at a stando distance from the wall being cooled and provide e ective downstream cooling. Additionally, the research characterized the time scales involved in the reactions through temperature measurements and imaging.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 27, 2013
- Accession Number
- ADA584267
Entities
People
- Jacob J. Robertson
Organizations
- Air Force Institute of Technology