A scalable concept for micropower generation using flow-induced self-excited oscillations

Clair, Daniel St.; Bibo, Amin; Sennakesavababu, V. R.; Daqaq, Mohammed F.; Li, G.

doi:10.1063/1.3385780

Cited by 121 publications

(67 citation statements)

References 15 publications

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“…The vibration data of various bridges is summarized in Table 1. The maximum acceleration of bridge vibration reported by Sazonov et al [19] is 0.55g; however, the maximum frequency (40 Hz) is recoded for the bridge reported by [20]. Short and medium span bridges vibrate with frequency typically ranging from 2 to 8 Hz and acceleration levels less than 0.1g [21].…”

Section: Introductionmentioning

confidence: 95%

Electromagnetic Bridge Energy Harvester Utilizing Bridge’s Vibrations and Ambient Wind for Wireless Sensor Node Application

Khan

Iqbal

2018

Journal of Sensors

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This paper presents novel electromagnetic bridge energy harvesters (BEHs) utilizing bridge vibrations and ambient wind surges to power wireless sensor nodes used for bridges' health monitoring. The developed BEHs are cantilever-type and are comprised of a wound coil, permanent magnet, an airfoil, cantilever beam, and a support. Harvesters are characterized in-lab under different vibration levels and are subjected to variable speed air surges. The harvesters exhibit multiresonant frequencies; prototype I has resonant frequencies of 3.6, 14.9, and 17.6 Hz. However, 7.6, 33, and 45 Hz are the resonant frequencies for prototype II. Under vibration testing, prototype I produced a maximum voltage of 206 mV and an optimum power of 354.51 μW at a frequency of 3.6 Hz and 0.4g acceleration. However, at a frequency of 7.6 Hz and 0.6g acceleration, prototype II showed the capability of generating a maximum voltage of 430 mV and an optimum power of 2214.32 μW. Moreover, when BEHs are characterized under variable speed air surges, prototype I generated a load voltage of 19 mV and a power of 7.84 μW at an air speed of 9 m/s; however, 22 mV and 9.14 μW load voltage and power, respectively, are developed by prototype II at 6 m/s air speed.

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Section: Introductionmentioning

confidence: 95%

Electromagnetic Bridge Energy Harvester Utilizing Bridge’s Vibrations and Ambient Wind for Wireless Sensor Node Application

Khan

Iqbal

2018

Journal of Sensors

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“…A large number of papers has been published where the suitability of some specific mechanisms to efficiently harvest electric energy through different energy converters (piezoelectric, electromagnetic, etc.) are considered [7][8][9]. Therefore, a considerable effort is being devoted to analyze this wind-induced vibration and develop simple theories to evaluate the energy-harvesting capabilities of twodimensional bluff bodies.…”

Section: Introductionmentioning

confidence: 99%

Transverse galloping of two-dimensional bodies having a rhombic cross-section

Ibarra¹,

Sorribes²,

Alonso³

et al. 2014

Journal of Sound and Vibration

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a b s t r a c tTransverse galloping is a type of aeroelastic instability characterized by oscillations perpendicular to wind direction, large amplitude and low frequency, which appears in some elastic two-dimensional bluff bodies when they are subjected to an incident flow, provided that the flow velocity exceeds a threshold critical value. Understanding the galloping phenomenon of different cross-sectional geometries is important in a number of engineering applications: for energy harvesting applications the interest relies on strongly unstable configurations but in other cases the purpose is to avoid this type of aeroelastic phenomenon. In this paper the aim is to analyze the transverse galloping behavior of rhombic bodies to understand, on the one hand, the dependence of the instability with a geometrical parameter such as the relative thickness and, on the other hand, why this cross-section shape, that is generally unstable, shows a small range of relative thickness values where it is stable. Particularly, the non-galloping rhombus-shaped prism's behavior is revised through wind tunnel experiments. The bodies are allowed to freely move perpendicularly to the incoming flow and the amplitude of movement and pressure distributions on the surfaces is measured.

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“…In order to design micro-power generators (MPG), Clair, Bibo, Sennakesavababu, Daqaq, and Li (2010), Clair, Stabler, Daqaq, Luo, and Li (2009) introduced the basic physics of this concept and they proved its feasibility. They investigated the response of a self-excited piezoelectric micro-power generator (MPG).…”

Section: Other Aeroelastic Energy Harvestersmentioning

confidence: 99%