S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Others_기계항공공학부
Coupled Analysis between CFD and CSD for a Helicopter Rotor in Hover and Forward Flight
- Lee, Hyun-ku; Yoon, Sung-Hwan; Kwak, Jin Sung; Shin, SangJoon; Kim, Chongam
- Issue Date
- 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, pp.- (14pages.)
- This paper presents a combination of an analysis between a computational structural dynamics (CSD) and high fidelity unsteady computational fluid dynamics (CFD) analysis. Regarding a helicopter in hover, aerodynamic loads are computed from the three dimensional Navier-Stokes solver in overlapped grids, and blade motions are estimated from the geometrically exact rotor beam analysis. While combining those two analyses, a loosely coupled method is used and the results are validated regarding a civil transport helicopter. The next step is to analyze a periodic steady-state flight condition such as forward flight. In this paper, HART II blade flapping motion in a forward flight acted upon by periodic airloads and collective pitch angle is predicted by using a similar procedure as is used in hover. But the response phase is obtained to be different from that observed in the experiment. Thus, a further consideration upon the periodic excitation forces and the blade response will be required in the foregoing CFD and CSD computation for forward flight.
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