Modern helicopter rotor aerodynamics |
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| Institution: | 1. CFD Laboratory, School of Engineering, University of Glasgow, Glasgow, G12 8QQ, Scotland, UK;2. National Key Laboratory of Rotorcraft Aeromechanics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;1. Department of Mechanical Systems Engineering, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, 184-8588, Tokyo, Japan;2. The Aviation Technology Directorate, Japan Aerospace Exploration Agency, Osawa 6-13-1, Mitaka, 181-0015, Tokyo, Japan;1. National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. School of Engineering, University of Liverpool, L69 3GH, UK;3. School of Engineering, University of Glasgow, Glasgow, G128QQ, Scotland UK |
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| Abstract: | The helicopter rotor wake is among the most complex fluid dynamic structures being three dimensional and in many cases unsteady. The wake begins at the blade(s) where the flow can be transonic near the blade tip and undergo compressible dynamic stall. Farther down in the wake, the flow is essentially incompressible. Moreover, the rotor blades undergo complex unsteady motions because of the necessity to balance moments; they are elastic as well. In this paper, the fundamental aeromechanics of the wake and the flow on the blade is discussed and the primary methods of analysis, computation, and experiment employed to uncover the physics of the rotor wake are described. |
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