Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2004.04a
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- Pages.1672-1677
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- 2004
A Study on the Unsteady Flow Characteristics of a Delta Wing by 3-D Stereo PIV
3-D Stereo PIV에 의한 비정상 델타윙 유동특성에 대한 연구
- Published : 2004.04.28
Abstract
Leading edge extension(LEX) in a highly swept shape applied to a delta wing features the modem air-fighters. The LEX vortices generated upon the upper surface of the wing at high angle of attack enhance the lift force of the delta wing by way of increased negative suction pressure over the surfaces. The present 3-D stereo PIV includes the Identification of 2-D cross-correlation equation, stereo matching of 2-D velocity vectors of two cameras, accurate calculation of 3-D velocity vectors by homogeneous coordinate system, removal of error vectors by a statistical method followed by a continuity equation criterion and so on. A delta wing model with or without LEX was immersed in a circulating water channel. Two high-resolution, high-speed digital cameras(