A Study of Aeroacoustic Performance of a Contra-Rotating Axial Flow Compressor Stage

P.B. Sharma; D.S. Pundhir; K.K. Chaudhry

doi:10.14429/dsj.41.4424

P.B. Sharma Department of Mechanical Engineering, Indian Institute of Technology , New Delhi
D.S. Pundhir Department of Mechanical Engineering, Indian Institute of Technology , New Delhi
K.K. Chaudhry Department of Mechanical Engineering, Indian Institute of Technology , New Delhi

DOI: https://doi.org/10.14429/dsj.41.4424

Keywords: Contra rotating axial flow compressor, Hub tip ratio, Contra rotors, Aeroacoustic performance

Abstract

The paper reports of an experimental investigation into the aeroacoustic performance of a contra-rotating axial flow compressor stage having a hub-tip ratio of 0.66. Aerodynamic superiority of a contra-stage is examined from the point of view of higher pressure rise, increased through flow and rotating stall suppression. Measurements of sound pressure level and real-time analysis of the noise signals is reported for two axial gap between the rotors on the aeroacoustic performance is discussed. The study reveals that the axial gap between the rotors significantly affects the aeroacoustic performance of a contra-stage.

Author Biographies

P.B. Sharma, Department of Mechanical Engineering, Indian Institute of Technology , New Delhi

Department of Mechanical Engineering, Indian Institute of Technology , New Delhi

D.S. Pundhir, Department of Mechanical Engineering, Indian Institute of Technology , New Delhi

Department of Mechanical Engineering, Indian Institute of Technology , New Delhi

K.K. Chaudhry, Department of Mechanical Engineering, Indian Institute of Technology , New Delhi

Department of Mechanical Engineering, Indian Institute of Technology , New Delhi