Research on Aerodynamics and Aeroacoustics of Duct Fan based on Panel-Vortex Particle Method

With the urge requirement of high-performance aircraft electric propulsor, duct fan is expected to work in different operation conditions efficiently and satisfying multiple targets constraint. However, the putting up of higher design standards means FEM or FVM will be unsuitable because of the high computational cost. To achieve a balance between computational cost and accuracy, especially an unsteady aerodynamic problem e.g. aeroacoustics/aeroelasticity, the highefficiency Panel-Vortex Particle Method (PVM) is developed to predict the aerodynamic performance of a duct fan. Then, the duct acoustic model is developed to complete the acoustics prediction of duct fan. The hybrid method, consisting PVM and duct acoustic model, can be used to get a similar thrust with error of 0.93% when the span ratio of mesh is less than 91.6%, when comparing with FVM results. But the thrust of blade tip is over-predicted, which causes a total error of 5.36%, and the SPL is in a relative error of 4.16% under 1BPF and 11.55% under 2BPF.