Innovative SiC-SiC Multi-Hole Cooled Liner Technology for IHPTET Trapped Vortex Combustor (TVC) Concept

The Airforce IHPTET program represents a quantum leap in the gas turbine technology such that it features truly revolutionary advances. These advances comprise increased cycle pressures and temperatures, near stoicheometric combustion, increased strengthceramic matrix composites, and the use of super alloys. In concert with these IHPTET goals, the novel approach described herein features a newly developed Trapped Vortex Combustor (TVC), and the application of a multi-hole cooled SiC-SiC Ceramic MatrixComposite (CMC) as the combustor liner material. In Phase 2 of the effort, we propose to develop an optimized liner-cooling scheme for the 12 in. TVC combustor model and test it in AFOSR, Room 20 facility. The liner will feature the, Rockwell developed,integrally woven, CMC fabric weave technology, and GEAE design practices used for effecting multi-hole cooling. In particular, the development of the weave technology will focus on salient barrier issues, as its application to IHPTET combustors isrelatively recent. After having developed the TVC specific interwoven CMC liner technology, we will fabricate an outer cavity liner of the TVC combustor that will be compatible with existing AFOSR 12 in. test rig. The testing will focus on evaluating thetemperatures, stresses and the life of the liner under stoicheometric combustion. In addition, we will also evaluate the potential of the hot walls at reducing NOX, CO, and improving combustor performance characteristics such as altitude relight andignition.