فصلنامه
نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار مهندسی مکانیک - دانشگاه صنعتی اراک
2 گروه طراحی کاربردی، دانشکده مهندسی مکانیک، دانشگاه صنعتی اراک، اراک، ایران
3 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه خوارزمی، تهران، ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
This research explores the potential of biomimetic geometries derived from natural leaf shapes to study flow-induced vibrations (FIV) and energy harvesting through experiments in a wind tunnel. Five real tree leaves (grape, fig, silver maple, hawthorn, and Norway maple) were selected, their 2D profiles extracted, and converted into physical test models. Each model was mounted on a flexible beam inside a wind tunnel and equipped with piezoelectric strips to measure electrical signals generated from oscillations. Simultaneously, a high-speed camera tracked the transverse displacement of each model throughout the test. Among all cases, the fig leaf geometry exhibited the highest vibration amplitude and frequency stability, resulting in the maximum harvested power. The grape leaf followed in performance, combining strong vibration responses with reasonable energy output. Although the silver maple showed limited response at lower wind speeds, it performed efficiently at higher speeds. In contrast, the hawthorn and Norway maple models produced smaller vibrations and lower frequencies, resulting in lower harvested power. These findings clearly demonstrate the crucial role of geometry in optimizing vibration-based energy harvesting performance.
کلیدواژهها English
