Influences of Lorentz force on the hydrofoil lift

In this paper, Lorentz forces are proved to be able to suppress separation in flows over hydrofoils. Furthermore, a differential equation of pressure distributions on the hydrofoil surface is derived, from which it is found that BVF (boundary vortex flux) σ is a suitable criterion for describing the lift coefficient variations during the electromagnetic control process. According to our numerical results, the periodic variations of lift for a hydrofoil at an attack angle of 17 ^? are analyzed and its inherent mechanism is discussed in detail with the concept of BVF. On the other hand, the effects of Lorentz force on the hydrofoil’s lift are investigated both experimentally and numerically for different magnitudes and locations.