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Compressor with asymmetric stator and acoustic cutoff

  • US 8,534,991 B2
  • Filed: 11/20/2009
  • Issued: 09/17/2013
  • Est. Priority Date: 11/20/2009
  • Status: Active Grant
First Claim
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1. A method of manufacturing a compressor section comprising the steps of:

  • defining a compressor section having a first number of blades, and at least one stator section having a number of vanes, with each stator section having at least two sections wherein a spacing between the vanes in a first of the sections is not equal to a spacing between the vanes in a second of the sections;

    selecting the number of blades, and the number of vanes in at least one of the sections to achieve cutoff; and

    a minimum absolute value for a quantity m is utilized to calculate whether the compressor will achieve cutoff, and wherein m=nB−

    2 kV, wherein V is equal to the number of vanes in the one of the two subsections, n is the blade passing frequency harmonic, which is an integer, B is the number of blades, and k is a vane passing frequency harmonic order, which is an integer.

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