| Citation: | TANG Sijia, CAO Desong, YAN Wenhui, et al. Stage spacing on aerodynamic performance of a certain type of coaxial contra rotating propeller[J]. Journal of Aerospace Power, 2023, 38（3）：709-716 doi: 10.13224/j.cnki.jasp.20220464
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In order to master the law of aerodynamic interaction between stages of coaxial contra rotating propeller, reduce the intensity of aerodynamic interference between propellers and improve the aerodynamic performance of coaxial contra rotating propeller, the effects of 4 stage spaces between front and rear rows of 6×6 contra rotating propeller on aerodynamic interference were studied based on Reynolds averaged unsteady Navier-Stocks equation method and sliding mesh technique. The results showed that: the average propulsion efficiency of the coaxial contra rotating propeller was the highest when the stage spacing was 0.25 times of the propeller diameter. In addition, the efficiency fluctuation caused by aerodynamic interference was smaller. With the increase of stage spacing, the intensity of aerodynamic interference of front and rear propellers decreased. Compared with the rear propeller, the thrust pulsation of front propeller caused by aerodynamic interference was more sensitive to stage spacing. It can be seen that the stage spacing of coaxial contra rotating propeller had an obvious impact on the aerodynamic interference of propellers. Appropriate stage spacing in the design of coaxial contra rotating propeller is important to improve the aerodynamic performance of contra rotating propeller.
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