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ACCURACY AND CALCULATION TIME
FREE WAKE ANALYSIS
IMPLEMENTATION OF THE FREE WAKE MODEL
accuracy analytical approximation arc geometry arc length azimuthal location Basic Curved Vortex BCVE BCVE's Biot-Savart integration Biot-Savart law blade revolutions Boeing Vertol circular arc collocation points convection coordinate system core radius crossflow curved element method curved vortex elements displacement vector distortion downstream downwash effect element calculation element length element model errors associated find the velocity Flapping Coefficient flight free wake forward flight free free wake analysis free wake calculation free wake model free wake solution geometry Helicopter Rotor implementation interpolated point method midpoint and end nondimensional normal velocity number of elements one-bladed rotor parabolic arc point of evaluation position error quadratic radius of curvature relatively roll-up rotor blade rotor wake self-induction shows SIVE straight-line element errors straight-line segments subinterval subsection swirl velocity distribution term tip vortex turns of free velocity component velocity error velocity field velocity induced vortex core vortex filament vortex ring vortices wake shape wake turns