Volume 30 Issue 2
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TONG Fan, QIAO Wei-yang, WANG Liang-feng, JI Liang, WANG Xun-nian. Numerical calculation and analysis of fan turbulence broadband noise's characteristics[J]. Journal of Aerospace Power, 2015, 30(2): 455-462. doi: 10.13224/j.cnki.jasp.2015.02.025
Citation: TONG Fan, QIAO Wei-yang, WANG Liang-feng, JI Liang, WANG Xun-nian. Numerical calculation and analysis of fan turbulence broadband noise's characteristics[J]. Journal of Aerospace Power, 2015, 30(2): 455-462. doi: 10.13224/j.cnki.jasp.2015.02.025
shu

Numerical calculation and analysis of fan turbulence broadband noise's characteristics

doi: 10.13224/j.cnki.jasp.2015.02.025

  • 1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072;

  • 2. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

  • Received Date: 2013-09-26
  • Publish Date: 2015-02-28
    Abstract
  • Based on the fan self-noise empirical prediction model developed by Gliebe and the turbulence -blade interaction noise analytical prediction model developed by Mugridge-Morfey and using GE R4 Fan for study, a detailed analysis of fan self-noise and rotor wake turbulence-OGV (outlet guide vane) interaction broadband noise (turbulence interaction noise) characteristics is performed. Different fan design parameters and different turbulence parameters' effects on the fan self-noise and turbulence interaction noise is investigated. Calculation results show that turbulence interaction noise dominates the fan broadband noise. Turbulence interaction noise is about 6-10dB higher than rotor self-noise and about 20dB higher than outlet guide vane self-noise. In addition, the incoming flow velocity of OGV plays the most important role in turbulence interaction noise and 15% increase of the velocity can lead to an increased sound power of about 4dB. The turbulence intensity has relatively important effects on the turbulence interaction noise and 30% increase of turbulence intensity can result in about 1.5dB higher sound power.

     

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