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Volume 16, Issue 32 (11-2020)                   Marine Engineering 2020, 16(32): 1-8 | Back to browse issues page

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Naderi-Asrami H, Bahrami Asl S, tabeshpour M, Seif M S. Experimental and Mechanical Measurement of Transverse Deflection and Comparison of Optimal Velocity for Energy Harvesting in Uniform and Tapered Cylinders from Vortex-Induced-Vibrations. Marine Engineering 2020; 16 (32) :1-8
URL: http://marine-eng.ir/article-1-813-en.html
Experimental and Mechanical Measurement of Transverse Deflection and Comparison of Optimal Velocity for Energy Harvesting in Uniform and Tapered Cylinders from Vortex-Induced-Vibrations
Hodjat Naderi-Asrami1 , Shabnam Bahrami Asl1 , Mohamadreza Tabeshpour * 1, Mohammad Saeed Seif1
1- Sharif University of Technology
Abstract:   (3652 Views)
Experimental measurements of dynamic instabilities in water environments are challenging due to their fluctuation and small amplitude. Most of studies use electrical circuits, this paper aims to use only mechanical methods to measure vortex induced vibrations. Measuring the fluctuations amplitude can help designing mechanisms for movement and for mechanical energy harvesting. This paper uses the novel particle image velocimetry method. The test comprises of a cylinder moving in water with different velocities. Uniform and tapered cylinders are used. Study of tapered cylinder is unprecedented. Output data is in the form of dimensionless amplitude-velocity graphs. From this test velocity for producing largest amplitude is obtained. It is also seen that in the efficient velocity, amplitude of uniform cylinder is larger. While tapered cylinder is suitable for using in currents with variable velocities. 
Keywords: Vortex Induced Vibrations, Experimental Test, Particle Image Velocimetry, Energy Harvesting Methods
Full-Text [PDF 711 kb]   (1401 Downloads)    
Type of Study: Technical Note | Subject: CFD
Received: 2020/03/9 | Accepted: 2020/08/6
References
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