Influence of Coolant Flow Rate Parameters in Scaling Gas Turbine Cooling Effectiveness
Abstract
Rather than replicating engine temperature conditions, film cooling experiments often take place at room temperature. As a result, the fluid properties as well as coolant flow rate parameters cannot be simultaneously matched between the laboratory and the engine. The influence of various coolant flow rate parameters were evaluated for a simulated leading edge at Re = 60K. Both infrared thermography and pressure sensitive paint were used to evaluate the cooling flows of air, argon, carbon dioxide, and nitrogen. The momentum flux ratio was found to best scale the location and shape of the coolant effectiveness profile, while the advective capacity ratio scaled the effectiveness magnitude in thermal experiments. Furthermore, pressure sensitive paints were found to be insufficient one-to-one replacements for the thermal method.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2016
- Accession Number
- AD1054205
Entities
People
- Connor J. Wiese
Organizations
- Air Force Institute of Technology