Investigation of losses prediction models in 1D for axial flow, two - stage turbine

Performance estimation of the axial flow gas turbines under variety of operating conditions like different speeds and pressure ratios has been hampered by lack of reliable experimental data and experiments cost. Simulation of gas turbine is a simple way to reduce testing costs and complexity. One-dimensional (1D) modeling is a simple, fast and accurate method for performance prediction of turbine with different geometries. In this approach, inlet flow conditions and turbine geometry are known and by considering loss model, the turbine performance characteristics are predicted. In present work, the performances of a two-stage axial-flow turbine have been predicted by using 1D modeling approach and a new suggested algorithm. Finally, in order to better understanding the loss models behavior and verify the suggested algorithm accuracy, the analytical results from modeling were compared with experimental results and comparison shows that good adaptation is obtained.

کلیدواژه ها:

Axial flow turbine ، losses coefficient ، design point ، experimental results