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Double lobed mixer with major and minor lobes

  • US 5,638,675 A
  • Filed: 09/08/1995
  • Issued: 06/17/1997
  • Est. Priority Date: 09/08/1995
  • Status: Expired due to Term
First Claim
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1. A mixer for mixing concentric inner and outer flow streams in a turbofan engine, the mixer having a plurality of circumferentially distributed axially extending major lobes, each major lobe having a radial height which increases in the downstream direction, the major lobes defining a plurality of circumferentially distributed major chutes, the mixer characterized by:

  • a pair of minor lobes at the radially outermost periphery of each major lobe;

    each minor lobe having a radial depth which is smaller than the radial depth of the major lobes;

    each minor lobe originating aft of the upstream ends of the major lobes; and

    each pair of minor lobes defining a minor chute for directing a portion of the outer flow stream to discrete radial locations in the inner flow stream.

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