삼차원 와선의 비정상 거동에 의한 원거리 음압의 수치해석Numerical Calculation of the Far Field Acoustic Pressure from the Unsteady Motion of the Three-dimensional Vortex Filament

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Far field acoustic pressure from the evolution and interaction of three-dimensional vortex filament is calculated numerically. A vortex ring is a typical example of the three-dimensional vortex filament. An elliptic vortex ring emits a strong sound signal due to significant distortion and stretching of the vortec filament. The far field acoustic pressure is linearly dependent on the third time derivatives of the vortex positions. A numerical scheme of high resolution is employed to describe in detail the elliptic vortex ring motions which ar highly nonlinear. Descretized vortex filaments are interpolated by using a parametric blending function to remove a possible numerical instability. The distorted vortex filament, owing to the self-induced and the induced velocity from the other vortex segments, is redistributed at each time step. The accuracy and efficiency of the scheme are validated by comparisons with the analytic solution of circular vortex ring interaction.
Publisher
대한기계학회
Issue Date
1997-01
Language
Korean
Citation

대한기계학회논문집 A, v.21, no.6, pp.942 - 950

ISSN
1226-4873
URI
http://hdl.handle.net/10203/69456
Appears in Collection
AE-Journal Papers(저널논문)
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