This article presents a literature review about the physical analysis of the loss models, which are used in offdesign procedure for high-pressure turbines.
A high-pressure turbine is designed to have maximum performance at design point. However, engines are operating
in different conditions, and the comprehension of off-design conditions is very important. The loss mechanisms are very
complex and predictions considering empirical methods are a good approach to have preliminary results. Based on
these results, different researches have proposed theories about the loss mechanisms, and over the time, these models
have been modified to describe better the phenomena involved between blades and flow. Once the physical mechanisms
behind the loss models are known, it is possible to compare them and understand the reason why the results given for
some methods present a higher agreement to experimental or numerical data.
In this framework, 2D numerical simulations of the flow around the blades of an axial high pressure turbine with
different off design conditions have been realized, by using ANSYS FLUENT® code, to show the losses described by
some of these models. Using these simulations a loss model has been selected and implemented in Matlab® to compare
its results with the experimental data found in literature.
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