Multidisciplinary Optimization Design of Low-Noise Propellers

In this paper, a multidisciplinary optimization design method and its verification of low-noise aircraft propellers considering aerodynamics, noise, structural strength were carried out to further reduce the aerodynamic noise propellers. The Vortex Lattice Method-based Lift Surface Method Frequency-Domain-based Hanson deployed evaluate performance far-field propeller with validation by benchmark test result comparison, respectively. Integrating both aforementioned methods, constraints, genetic algorithm coding, joint program was successfully proposed so that could be optimized comprehensively. program, variables contain blade strength-constrained distribution patterns chord length, twist angle, dihedral angle along radius. A maximum amount reduction settled as an target. Meanwhile, it ensured no penalty for thrust efficiency. delivered performing developed program. Its structure examined tests such static load dynamic response, aeroacoustic performances tested at wind tunnel. As result, reduced emission peak 2.7 dB first BPF under typical conditions performed 4 lower-thrust operations compared baseline propeller. For latter operation, second also obviously observed.