Abstract
For their low-radar signature, diamond-wing configurations with blunt leading edges recently attract attention for unmanned applications. For this purpose, the AVT-183 generic configuration is investigated both experimentally and numerically. The flow field is complex, exhibiting both vortical structures and attached flow regions. Despite numerous investigations of the fully turbulent case, little research focuses on the naturally transitioning boundary layer. This paper discusses the transitional and fully turbulent case comparatively. In addition, transient and steady flow-field measurements and oil-flow visualization complete the aerodynamic data set of the AVT-183 diamond-wing model. The separation phenomenon is discussed in detail for both laminar and turbulent leading-edge separation. Low and high frequency fluctuations correlate with the primary and the secondary separation processes, respectively, which are also analyzed.
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