Improved Heat Release Model for Augmentor Screech Characterization

The Air Force has identified a need for improved design tools for augmentor performance. In the near term, it is apparent that reduced order models are needed in order to assist in the design process. One key area that requires effort is the area of screech modeling. A critical aspect of any model that attempts to predict screech is the correct representation of the dynamic heat release rate. In this Phase I SBIR, Energy Research Consultants and its partner, Georgia Institute of Technology will join together to 1) develop a formulation for a reduced order heat release model, and 2) conduct experiments in augmentor like conditions to validate the model. Georgia Tech’s experience with combustion oscillations combined with unique experimental facilities at ERC will provide the right combination of resources to efficiently develop the design tool needed. In Phase I, the effort will be limited to homogeneous mixtures for validation, but the model formulation will be general enough to allow variation in fuel/air ratio and variation in the average mixture temperature to be evaluated.