Author:
Liu Liang,Lyu Qiongying,Liu Guosong
Abstract
Abstract
Some unmanned aircrafts with ducted fan systems are characterized by high efficiency, structural safety and good stability. As a major part of such aircrafts, the ducted fan plays an important role in performance. However, changes in the fan blade structure will influence the fan action. First, from a manufacturing point of view, materials and gate positions were selected. The injection molding process parameters were optimized based on an orthogonal testing analysis method, and this optimization process reduced the warpage by 36.4%. Then, the flow fields of the ducted fans in the theoretical and deformed models were compared and analyzed with SolidWorks computational fluid dynamics (CFD). Finally, the wind velocity values at different distances from the nozzle outlet of the ducted fan were obtained using a wind speed measurement experiment system. The results from the model comparisons showed that fan blade deformation reduced the wind speed by approximately 5%.
Subject
General Physics and Astronomy
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