Noise Studies of Inlet-guide-vane: Rotor Interaction of a Single-stage Axial-flow Compressor |
Common terms and phrases
3.39-chord spacing 31 guide vanes 6.25-chord spacing 62-guide-vane assembly Airflow 80 airfoil anechoic chamber axial spacing axial-flow compressor blade loading blade passage frequency Calculated and measured calculated patterns calculated radiation patterns chord spacing Compressor Noise cut-off Mach number cut-off ratio drag coefficient Effect of rotor-inlet-guide-vane experimental data Figure 11 fundamental blade passage inlet guide vanes inlet-guide-vane configuration Jet Engine Langley Research Center M₁ measured one-third octave N₁₂ noise pressure noise radiation patterns Noise Studies number of lobes number of rotor octave at blade one-third octave band oscillograph overall noise radiation peak noise level pitot-static tubes propagation range of rotor reduction in noise rotor blades rotor shaft speed rotor speeds rotor tip Mach rotor tip speeds rotor-53-guide-vane configuration rotor-guide-vane spacing rotor-inlet-guide-vane spacing rpm rpm shown in figure Sound pressure level spacer ring spectra spinning modes stator stream velocity test setup tip Mach number turning angle velocity defect