Numerical investigation into the energy harvesting from vortex-induced vibration phenomenon using piezoeletricity

• Grant number: 14/19530-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): January 01, 2015
• Effective date (End): December 31, 2015
• Field of knowledge: Engineering - Naval and Oceanic Engineering - Marine and Ocean Structures
• Principal Investigator: Guilherme Rosa Franzini
• Grantee: Lucas Oliveira Bunzel
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The flow around a cylindrical body may be subjected to separation, leading to the formation of two free shear layers and periodic vortex-shedding. In the problem of an elastic structure, the vortex-shedding frequency may be close to the one of the Eigen frequencies, defining the vortex-induced vibration (VIV) phenomenon. This phenomenon is of great interest on risers dynamics and presents maximum oscillation amplitudes close to one diameter and occurs on a specific range of free-stream velocities. Usually, it is interesting to suppress the VIV due to the structural fatigue of risers. However, the self-excited character of VIV motivated efforts aiming at the energy harvesting for low power equipment. Another source of clean energy is the use of piezoelectric materials in oscillating structures, which associate mechanical strain to voltage. The objective of this research project is to employ the phenomenological models for VIV jointly with constitutive equations of piezoelectric materials in order to simulate the energy harvesting.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FRANZINI, GUILHERME R.; BUNZEL, LUCAS O.. A numerical investigation on piezoelectric energy harvesting from Vortex-Induced Vibrations with one and two degrees of freedom. JOURNAL OF FLUIDS AND STRUCTURES, v. 77, p. 196-212, FEB 2018. (14/19530-2)