Axial Spacing Effects on Rotor-Rotor Interaction Noise and Vibration in a Contra-Rotating Fan

Figure 6

RMS pressure of two rotors at three typical spans with different axial spacing.

(a) 10% blade height of rotor 1

(b) 10% blade height of rotor 2

(c) 50% blade height of rotor 1

(d) 50% blade height of rotor 2

(e) 90% blade height of rotor 1

(f) 90% blade height of rotor 2