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Structures and methods for forcing coupling of flow fields of adjacent bladed elements of turbomachines, and turbomachines incorporating the same

  • US 8,926,276 B2
  • Filed: 01/23/2014
  • Issued: 01/06/2015
  • Est. Priority Date: 01/23/2013
  • Status: Active Grant
First Claim
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1. A turbomachine, comprising:

  • a primary flow path;

    a first bladed element having a first blade region containing a plurality of first blades in said primary flow path;

    a second bladed element having a second blade region containing at least one second blade in said primary flow path, wherein said second blade region is located adjacent to and downstream from said first blade region; and

    a close-coupling flow guide (CCFG) that is designed and configured to, during use, couple a flow field of said first bladed element within said primary flow path with a flow field of said second bladed element within said primary flow path to thereby increase at least one of a work input coefficient and relative impeller diffusions;

    wherein said first bladed element has a rotational axis and at least one of said plurality of first blades has a trailing edge located at a radius, r2, from said rotational axis, said CCFG having a leading edge located at a radius, rc, from said rotational axis, and wherein rc/r2 is less than about 1.

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