بررسی تجربی استحصال انرژی الکتریکی به کمک ایجاد گردابه از اندرکنش سیال و سیلندر مربعی در زاویه های مختلف حمله
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نویسندگان
1گروه آموزشی مکانیک
2گروه مکانیک دانشگاه خیام
چکیده
A recent study has developed an electromagnetic energy harvester that can harvest energy from flow-induced vibrations in real-time by using a magnet in translation within a coil. As part of this system, a flow channel is connected to a flow source by a flexible diaphragm, and a square cylinder acts as a bluff body, oscillating the diaphragm with an attached permanent magnet surrounded by a coil, thereby generating electrical energy. Using electromagnetic induction and fluid flow, it converts flow energy into electrical energy. The influences of the Reynolds number (Re = 3000, 4000, and 5000) and the position of square cylinder (X*=X/D) on the dynamic characteristics are considered. In light of the results, it becomes clear that the Reynolds number and incidence angle play an influential role in the amount of energy harvested from the interaction between fluid and a square cylinder. The higher Reynold number prescribes, the higher voltage can be obtained. Furthermore, an experiment has shown that an output voltage of 0.03 V can be generated when a diamond configuration is employed. Having employed three typical incidence angles of α = 0○, 22.5○, and 45○, overly, α = 45○ is the most suitable arrangement for the conversion of power.
کلیدواژه ها
 
Title
energy harvesting; electromagnetic energy; Reynolds number; square cylinder
Authors
Ebrahim Barati, Amir Sarviha, Mehdi Rafati
Abstract
A recent study has developed an electromagnetic energy harvester that can harvest energy from flow-induced vibrations in real-time by using a magnet in translation within a coil. As part of this system, a flow channel is connected to a flow source by a flexible diaphragm, and a square cylinder acts as a bluff body, oscillating the diaphragm with an attached permanent magnet surrounded by a coil, thereby generating electrical energy. Using electromagnetic induction and fluid flow, it converts flow energy into electrical energy. The influences of the Reynolds number (Re = 3000, 4000, and 5000) and the position of square cylinder (X*=X/D) on the dynamic characteristics are considered. In light of the results, it becomes clear that the Reynolds number and incidence angle play an influential role in the amount of energy harvested from the interaction between fluid and a square cylinder. The higher Reynold number prescribes, the higher voltage can be obtained. Furthermore, an experiment has shown that an output voltage of 0.03 V can be generated when a diamond configuration is employed. Having employed three typical incidence angles of α = 0○, 22.5○, and 45○, overly, α = 45○ is the most suitable arrangement for the conversion of power.
Keywords
Energy harvesting, electromagnetic energy, Reynolds number, square cylinder