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《Journal of Nanjing University of Aeronautics & Astronautics》 2016-02
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Trim Characteristics and Verification of Coaxial Rigid Rotor Aircraft

Yuan Ye;Chen Renliang;Li Pan;National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,Nanjing University of Aeronautics &Astronautics;  
Aiming at the difference between the coaxial rigid rotor and the conventional rotor,the aerodynamic models of coaxial rigid rotor are built in terms of rotor flapping,pitch control and induced velocity.The flapping movement function of the coaxial rigid rotor is introduced based on the concept of equivalent flapping.The pitch control motion fitting with the flapping frequency of coaxial rigid rotor is modeled based on the concept of control phase angle.The induced inflow velocity of the coaxial rigid rotor is modeled by using the interference factor.With the flight dynamic models mentioned above,the trim characteristics of pure-helicopter mode with the example of XH-59 A helicopter are analyzed,and the models are verified by the flight test data.Comparison of the trim characteristics between coaxial rigid rotor aircraft and conventional single rotor helicopter is performed.
【Fund】: 国家自然科学基金青年科学基金(51405227)资助项目;; 航空科学基金(20145752034)资助项目;; 江苏高校优势学科建设工程资助项目
【CateGory Index】: V275.1
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