| Citation: | LI Zhida，CHEN Xiangxiang，WU Tao，et al.Flow characteristics and pitch regulation of high‑efficiency swept⁃curved counter rotating propellers［J］.Journal of Aerospace Power，2022，37（8）：1703‑1713. doi: 10.13224/j.cnki.jasp.20210278
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The flow characteristics of the swept⁃curved counter rotating propellers under high subsonic flow were analyzed by numerical calculation method，and the pitch regulation of the high efficiency counter rotating propellers under different free flow Mach numbers was studied.The results showed that in the flow field inside the swept⁃curved counter rotating propellers，the obvious shock wave structure began to form from about 30% of the relative blade span.However，when the peak Mach number was below 1.2，the shock wave intensity was relatively weak and the flow loss was acceptable.Because of significant effect of the pitch angle on the propulsion efficiency of the counter rotating propellers，a feasible and effective method to adjust the pitch of the counter rotating propellers was proposed.The numerical calculation showed that the propulsion efficiency of the counter rotating propellers was above 75%.The thrust values predicted by numerical simulation showed that the thrust of the front blade was more sensitive to the change of Mach number.
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