TY - JOUR
TI - Comparison of cross-flow turbine performance under torque-regulated and speed-regulated control
AU - Polagye, B
AU - Strom, B
AU - Ross, H
AU - Forbush, D
AU - Cavagnaro, R
T2 - Journal of Renewable and Sustainable Energy
AB - When experimentally evaluating the performance of a wind or water current turbine, one must impose a regulating torque on the turbine rotor by electrical or mechanical means. Some options limit this controlling torque to a purely resistive quantity, while servomotors and stepper motors allow torque to be applied in the direction of turbine rotation. Any control mode that results in net positive power for a turbine may be of interest for energy harvesting, and all of these are net “fluid-driven.” Here, we present experiments that characterize the power, torque, and force coefficients of a cross-flow turbine operated at a constant rotational speed or under a constant imposed control torque. Time- and phase-average performance coefficients are largely equivalent for the two strategies although torque-regulated control is restricted to a narrower range of rotational speeds and the two strategies result in slightly different blade kinematics.
DA - 2019/07//
PY - 2019
PB - AIP Publishing
VL - 11
IS - 4
SP - 16
UR - https://aip.scitation.org/doi/full/10.1063/1.5087476
DO - 10.1063/1.5087476
LA - English
KW - Current
KW - Cross Flow Turbine
KW - Lab Data
KW - Control
KW - Performance
ER -