TY - JOUR
T1 - Energy harvesting of two inverted piezoelectric flags in tandem, side-by-side and staggered arrangements
AU - Mazharmanesh, Soudeh
AU - Young, John
AU - Tian, Fang-Bao
AU - Lai, Joseph C.S.
N1 - Funding Information:
This research was undertaken with the assistance of resources from the National Computational Infrastructure (NCI), which is supported by the Australian Government . Soudeh Mazharmanesh wishes to gratefully acknowledge the support of the University of New South Wales Tuition Fee Scholarship for the pursuit of this study. Dr. F.-B Tian is the recipient of an Australian Research Council Discovery Early Career Research Award (project number DE160101098 ).
Funding Information:
This research was undertaken with the assistance of resources from the National Computational Infrastructure (NCI), which is supported by the Australian Government. Soudeh Mazharmanesh wishes to gratefully acknowledge the support of the University of New South Wales Tuition Fee Scholarship for the pursuit of this study. Dr. F.-B Tian is the recipient of an Australian Research Council Discovery Early Career Research Award (project number DE160101098).
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/6
Y1 - 2020/6
N2 - The flow-induced vibration characteristics and energy extraction performance of flexible inverted piezoelectric flags in a uniform flow are studied by using an immersed boundary-lattice Boltzmann method for Reynolds number of 100, mass ratio of 2.9 and non-dimensional bending stiffness of 0.26 which correspond to the maximum flapping amplitude for a single inverted flag. The coupled fluid-structure-electric dynamics of two inverted piezoelectric flags in the tandem, side-by-side and staggered arrangements is investigated to determine the effects of the piezoelectric parameters (α and β) on the dynamics of the flags and to quantify the energy harvesting performance. Simulations are conducted by varying the streamwise gap distance (Gx/L) from 0.1 to 3.2 and cross-stream gap distance (Gy/L) from 0.4 to 2.5. It is found that both the flapping amplitude and the frequency of the flags reduce as the piezo-mechanical coupling parameter (α) increases due to the damping effect, particularly in the tandem arrangement. The maximum electrical power coefficient (C¯P) is produced in the staggered arrangement at α=0.5, β (piezo-electric tuning parameter) = 1.5, Gx/L=1.4 and Gy/L=2.2 where the C¯P of the downstream flag is 0.042, 16% and 12.5% higher than that of the upstream flag and that of the single flag, respectively. The improvement in C¯P of the downstream flag is attributed to the increase in the kinetic energy of the fluid flow created by the upstream flag as a bluff body.
AB - The flow-induced vibration characteristics and energy extraction performance of flexible inverted piezoelectric flags in a uniform flow are studied by using an immersed boundary-lattice Boltzmann method for Reynolds number of 100, mass ratio of 2.9 and non-dimensional bending stiffness of 0.26 which correspond to the maximum flapping amplitude for a single inverted flag. The coupled fluid-structure-electric dynamics of two inverted piezoelectric flags in the tandem, side-by-side and staggered arrangements is investigated to determine the effects of the piezoelectric parameters (α and β) on the dynamics of the flags and to quantify the energy harvesting performance. Simulations are conducted by varying the streamwise gap distance (Gx/L) from 0.1 to 3.2 and cross-stream gap distance (Gy/L) from 0.4 to 2.5. It is found that both the flapping amplitude and the frequency of the flags reduce as the piezo-mechanical coupling parameter (α) increases due to the damping effect, particularly in the tandem arrangement. The maximum electrical power coefficient (C¯P) is produced in the staggered arrangement at α=0.5, β (piezo-electric tuning parameter) = 1.5, Gx/L=1.4 and Gy/L=2.2 where the C¯P of the downstream flag is 0.042, 16% and 12.5% higher than that of the upstream flag and that of the single flag, respectively. The improvement in C¯P of the downstream flag is attributed to the increase in the kinetic energy of the fluid flow created by the upstream flag as a bluff body.
KW - Fluid-structure interaction
KW - Immersed boundary-lattice Boltzmann method
KW - Inverted piezoelectric flags
UR - http://www.scopus.com/inward/record.url?scp=85082765914&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatfluidflow.2020.108589
DO - 10.1016/j.ijheatfluidflow.2020.108589
M3 - Article
AN - SCOPUS:85082765914
SN - 0142-727X
VL - 83
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
M1 - 108589
ER -