SBIR-STTR Award

A model for predicting the performance impact of engine deterioration is proposed for feasibility evaluation. This model would account for rotating component deterioration such as increased tip clearances, surface roughness, leading edge bluntness and van bow and twist. The proposed approach uses a stage stacking method to allocate losses throughout the engine which are dependent on operating times and component operating parameters. These parameters are related back to engine mission profile so that all of the Navy mission profiles can be analyzed using the final model. Predicted performance using engine simulation decks will be compared with actual engine test data to verify the performance deterioration model.

A model for predicting the performance deterioration of gas turbines will be finalized and implemented in this Phase II effort. The model is based on the Phase I results and predicts performance deterioration based on the engine mission, the engine's physical and design performance characteristics, and the environmental conditions. The methodology uses a stage stacking technique combined with data correlations for the turine to determine the amount of deterioration. During Phase II, the performance deterioration methodology will be finalized and developed to include three specific engine simulation models. In addition, a generic simulation modeling capability will be developed using the NNEP simulation model. The model will be documented in a user's manual, an implementation manual, and a final technical report.

Keywords:
PERFORMANCE MODELING GAS TURBINE SIMULATION MODELING DETERIORATION MODELING