Ducted fan is a potential propulsion unit for flying cars in the future, and it has a wide range of application prospects. In ground effect, due to the aerodynamic interference with the ground, the ducted fan easily enters an unstable state caused by rotating stall. In this paper, a simulation platform is built based on a modified MG model, and the simulation of the ducted fan in ground effect is carried out for hovering and landing conditions. The static and dynamic effects of the ground effect are discussed in detail and the sensitivity analysis of parameters is carried out. The results showed that the instability of the ducted fan increases with the decrease in altitude or the increase in speed under hovering conditions, while it doesn’t occur under landing conditions. In addition, the study pointed out that the pressure rise characteristics and flow characteristics of the ducted fan have a significant impact on its instability. The combination of high peak pressure rise coefficient and low corresponding flow coefficient can effectively improve the stability.
Research on Instability Characteristics of Ducted Fans in Ground Effect
Lect. Notes Electrical Eng.
Society of Automotive Engineers (SAE)-China Congress ; 2022 ; Shanghai, China November 22, 2022 - November 24, 2022
2023-04-29
14 pages
Article/Chapter (Book)
Electronic Resource
English
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