Lean and sweep optimization for aero-engine fan blades and aerodynamic characteristics analyses

Abstract

Abstract: The lean and sweep on the fan rotor of one aero-engine is optimized based on numerical model to improve the total pressure ratio and isentropic efficiency and ameliorate the overall performance of the engine under design conditions. Steady numerical simulation is implemented to analyze the grid independence and verify the effectiveness of the model employing 800 000 gridding plan of fan rotor. The stacking line is fitted by Bezier curve, controlling its lean and sweep with parameters; Taking total pressure ratio and isentropic efficiency at the design point as objective functions, automatic optimization is completed using artificial neural network and genetic algorithm. Comparing with the original model, the total pressure ratio and isentropic efficiency have been increased respectively by 0.18% and 0.71%. The static pressure distribution along the span and chord direction
are adjusted, reducing the tip loss and end wall loss and improving the fan aerodynamic performance at the design point.

Key words: fan blades, lean and sweep blades, aero-engine, aeronautical performance

CLC Number:

V232.4

BAI Jie, XIONG Peng, SHI Lei. Lean and sweep optimization for aero-engine fan blades and aerodynamic characteristics analyses[J]. Journal of Civil Aviation University of China, 2020, 38(2): 7-12.

References 14

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