Numerical Simulation of Helicopter Rotor Performance Degradation in Natural Rain Encounter

Figure 16

The lift-to-drag ratio distribution of the rotor disk at velocities of (a) 0 knots, (b) 40 knots, (c) 80 knots, (d) 120 knots, and (e) 160 knots.

(a)

(b)

(c)

(d)

(e)