| Citation: | NIE Bo, WANG Haifeng, DU Chenxi, et al. Impact of cross-flow on the aerodynamic load of propeller for stratospheric airship[J]. Journal of Aerospace Power, 2025, 40（2）：20230207 doi: 10.13224/j.cnki.jasp.20230207
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The validity of sliding mesh technology and detached eddy simulation (DES) with non-steady numerical methods was verified by wind tunnel tests of a scaled propeller model, and numerical calculations of aerodynamic loads under different cross-flow conditions were performed. The results showed that the instantaneous aerodynamic load coefficient of the rotating propeller exhibited periodic unsteady characteristics, and the flapping torque along the blade radius increased significantly with cross-flow angle, with an instantaneous value equivalent to the axial moment at 30°, and more than twice the axial moment at 60°. Along with an increasing number of blades, the frequency of fluctuations within one cycle increased. Compared with the two-bladed propeller, the amplitude of the thrust and torque coefficients of the four-bladed propeller relative to their mean values was reduced by 76.6% and 70.1%, respectively. Research method can provide effective input basis for the design of blade structure and related support mechanism.
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