Turbine Burners: Flameholding in Accelerating Flow

A review of turbine-burner research and some relevant background issues is presented. Previous work on thermal cycle analysis for augmentative combustion in the passages of the turbine on a turbojet or turbofan engine is discussed, identifying the potential for improvement in performance. Previous researches on reacting mixing layers in accelerating flows, flameholding in high-speed flows, and various types of compact combustors are reviewed. An overview is given of experimental and computational research at UCI on the use of cavities to stabilize flames in accelerating and turning flows. Some indications for optimizing the cavity design are presented. Effects of the cavity length and depth, injection orientation for fuel and air into the cavity, and Reynolds number magnitude are discussed. The needs for future work are identified.

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