Novel Aerodynamic Loss Analysis Technique Based on CFD Predictions of Entropy Production 951430

A recently developed aerodynamic loss analysis tool is helping engineers better understand loss mechanisms and compare turbomachinery redesign concepts; these loss analysis calculations are based on GE-Aircraft Engine's Computational Fluid Dynamics (CFD) simulations. The loss analysis tool, ENPROD3D, computes the thermodynamic parameter “Entropy Production” based on flux balance calculations. As an example, GEAE's E3 High Pressure Turbine Stage 1 Blade, has been analyzed using ENPROD3D; nearly half the total entropy produced is a result of boundary layer shear, 1/3 of the entropy production is a result of trailing edge wake-related aerodynamic losses, and the remainder loss is charged to secondary flow.


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