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Erschienen in:
2013 | OriginalPaper | Buchkapitel
3. Bluff Body Aerodynamics
verfasst von : Richard G. J. Flay
Erschienen in: Advanced Structural Wind Engineering
Verlag: Springer Japan
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Abstract
The aerodynamic characteristics of bluff bodies differ substantially from streamlined bodies, and an understanding of bluff body aerodynamics is essential to make progress in understanding wind engineering. Streamlined bodies like aircraft wings have a rounded nose, a thin profile, and a sharp trailing edge. Their wakes are small and for small angles of attack, the lift force developed is considerably greater than the drag force. On the other hand, bluff bodies have a large separated wake, with unsteady flow, and the drag force is comparable with the lift force. It is necessary to understand the size and nature of these forces to ensure that engineered designs are fit for purpose under wind action.