Numerical simulation of oscillating-wing based energy harvest mechanism using the high-order spectral difference method

摘要

A high-order spectral difference method based unsteady Navier-Stokes numerical framework is adopted to carry out simulations of oscillating-wing based energy harvest mechanism. Energy extraction with both the prescribed motion and the flow-induced motion are considered. The flow-induced motion is achieved via the fluid-structure interaction approach. Specifically, the foil dynamics is coupled into the flow solver to synchronize the flow-foil interaction. Results from both the prescribed motion approach and the flow-induced motion approach are compared. It is found that under certain conditions, the aerodynamic performances by using these two types of motions are comparable. Other aerodynamic features associated with the prescribed and the flow-induced motions are analyzed as well.