Volume 27 Issue 3
Mar.  2012
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MU Zhong-qiang, QIAO Wei-yang, ZHAO Lei. Investigation of tonal noise in high pressure turbine stage due to non-uniform inlet entropy of inflow[J]. Journal of Aerospace Power, 2012, 27(3): 666-673.
Citation: MU Zhong-qiang, QIAO Wei-yang, ZHAO Lei. Investigation of tonal noise in high pressure turbine stage due to non-uniform inlet entropy of inflow[J]. Journal of Aerospace Power, 2012, 27(3): 666-673.

Investigation of tonal noise in high pressure turbine stage due to non-uniform inlet entropy of inflow

  • Received Date: 2011-04-24
  • Rev Recd Date: 2011-07-11
  • Publish Date: 2012-03-28
  • Through using the flow solver which activated phase-lag method,got the three-dimensional(3-D) unsteady flow field in a high pressure turbine stage which had hot spots in inlet,and then by using the mode matching method in the duct of downstream rotor,the rotor-stator interaction discrete noise which propagated downstream was obtained.After compared with the case without hot spots in turbine inlet,the results show that the total acoustic power level of rotor-stator interaction discrete noise emitted in the downstream direction is increased by 5.9dB at the blade-passing frequency and by remarkably 11.6dB at the first harmonic of the blade-passing frequency.

     

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