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《Journal of Nanjing University of Aeronautics & Astronautics》 2002-01
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Application of Rotor Autoratation to Lift Transfer

Wang Huanjin Gao Zheng Key Laboratory of Helicopter Rotor Dynamics,Nanjing University of Aeronautics & Astronautics Nanjing 210016,P.R,China  
High speed helicopter is one of the goals since the helicopter was born.Recently,so many projects come out. However,every one must solve the problem related to main rotor stall and shock wave the reasons that restrict the forward speed of the helicopter.Most of the projects solve this problem by lift transfer, that is, to shift the lift from the main rotor in the helicopter model to the wing in the air plane model. In this paper, the state of rotor autorotation is introduced into lift transfer. A rotor can produce more lift in the autorotation state before stall than in the powered state.At the same time, the relationship between forward speed and the disk angle of attack is established for the autorotation rotor. The analysis shows that the wing area of the high speed rotorcraft scheme might be reduced if the autorotation state serves as the transition for lift shift. So the structure weight would be smaller and the drag as well as. It indicates that introducing rotor autorotation into the lift transfer is feasible.
【CateGory Index】: V211.52
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Chinese Journal Full-text Database 1 Hits
1 WANG Huan jin, GAO Zheng (National Key Laboratory of Rotorcraft Aeromechanics, Nanjing University of Aeronautics & Astronautics, Nanjing,210016,China);Design and Experiment of Lift Transfer in Scheme of High-Speed Helicopter[J];Journal of Nanjing University of Aeronautics & Astronautics;2003-03
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【Secondary Citations】
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1 Wang Huanjin Gao Zheng Department of Aircraft Engineering,Nanjing University of Aeronautics & Astronautics Nanjing,210016;A Method for Calculation of Unsteady Aerodynamic Loads on Rotor Blade[J];JOURNAL OF NANJING UNIVERSITY OF AERONAUTICS & ASTRONAUTICS;1999-01
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