A three-dimensional Eulerian analysis has been developed for modeling droplet impingement on lifting bodes. The Eulerian model solves the conservation equations of mass and momentum to obtain the droplet flow field properties on the same mesh used in CFD simulations. For complex configurations such as a full rotorcraft, the Eulerian approach is more efficient because the Lagrangian approach would require a significant amount of seeding for accurate estimates of collection efficiency. Simulations are done for various benchmark cases such as NACA0012 airfoil, MS317 airfoil and oscillating SC2110 airfoil to illustrate its use. The present results are compared with results from the Lagrangian approach used in an industry standard analysis called LEWICE.

Improving efficiency of wind turbines is a prevalent subject of research in current wind energy community. Most wind turbines are designed to operate at a prevailing wind speed, and the RPM, chord, and the twist distribution are optimized achieve maximum efficiency at this speed. Under off-design conditions, the efficiency of the rotor inevitably suffers. Circulation Control Wing (CCW) technology effectively modifies the lift and drag forces, and the zero lift angle of attack of the airfoil sections, allowing the wind turbines to operate efficiently at low to moderate wind speeds. At high wind speeds, circulation control may be used to alleviate excessive wind loads acting on the blades. Preliminary results are presented for a representative wind turbine rated at 100kW to demonstrate these benefits.

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