한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2005년도 춘계 학술대회논문집
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- Pages.159-168
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- 2005
탄성 날개 끝단의 공력 소음에 관한 전산해석 연구
Computational Study on Aeroacoustics of an Elastic Cantilevered Trailing-Edge
초록
Noise generated by the blunt trailing edge of lifting surfaces is investigated in this study using fluid structure interaction theory. First, through the eddy modeling, noise generation doe to the flow instability on the rigid trailing edge is surveyed. Then the behavior of elastic cantileverd beam is investigated. Parametric study based on various material properties is employed to analyze the motion of the beam. Moreover, each eigenmode approach of cantilevered beam is used to find when flow induced vibration is resonant. To analyze elastic behavior of cantilever beam efficiently, moving grid generation technique based on non-conservative form of Navier-Stokes equation is used. Equation of the motion associated with the cantilever beam is discretized by the Galerkin procedure with forced vibration. As a consequence, behavior of the elastic cantilevered beam is stable when the first mode natural frequency of the material is relatively higher than that of flow induced pressure fluctuation.
키워드