The present study is aimed at the experimental investigation of the effects of wing-propeller aerodynamic interaction in a boom-mounted configuration typically used in eVTOL aircraft. The investigation was focused on the repercussions on wing and propeller performance coming from the variation of angle of attack, advance ratio and blades sense of rotation. Moreover, particular attention was devoted to the evaluation of the effect of the propeller's longitudinal offset. Results of a comprehensive wind tunnel campaign performed on a propeller-mounted wing scaled model confirmed the advantageous effects of an inboard-up rotating propeller on lift generation and drag reduction, while outlined the opposite sensitivity of wing and propeller performances when exposed to a non-zero angle of attack. Propeller's longitudinal offset instead led to slight alterations on wing and propeller aerodynamic performance, while a noteworthy sensitivity on the mounting setup was perceived by propeller aerodynamic performance. Moreover, PIV measurements allowed to evaluate quantitatively the effects of the investigated parameters on propeller slipstream behaviour and blade tip vortices pattern.

中文翻译：

---

eVTOL 配置中机翼-螺旋桨气动相互作用的实验研究


本研究旨在对电动垂直起降飞机通常使用的吊杆安装配置中机翼螺旋桨空气动力相互作用的影响进行实验研究。调查的重点是攻角、前进比和叶片旋转方向的变化对机翼和螺旋桨性能的影响。此外，还特别关注了螺旋桨纵向偏移影响的评估。在安装有螺旋桨的机翼比例模型上进行的综合风洞实验的结果证实了内侧向上旋转螺旋桨对升力产生和减阻的有利影响，同时概述了当暴露于非-零攻角。相反，螺旋桨的纵向偏移导致机翼和螺旋桨空气动力学性能发生轻微变化，而螺旋桨空气动力学性能则对安装设置产生了显着的敏感性。此外，PIV 测量可以定量评估所研究的参数对螺旋桨滑流行为和叶尖涡流模式的影响。