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Pintle injector tip with active cooling

  • US 7,503,511 B2
  • Filed: 08/04/2005
  • Issued: 03/17/2009
  • Est. Priority Date: 09/08/2004
  • Status: Active Grant
First Claim
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1. A pintle tip comprising:

  • a central chamber having a first wall thickness and a first plurality of apertures there through so that a first portion of the first liquid exits the central chamber to mix with the second liquid at right angles therewith;

    a secondary chamber downstream of the central chamber having a second wall thickness and a second plurality of apertures there through so that a second portion of the first liquid exits the central chamber to mix with the second liquid at right angles therewith; and

    an end wall downstream of the secondary chamber having a non-ablative tip face adjacent combustion of the mixed first and second liquid propellants,wherein the second wall thickness is greater than the first wall thickness so that the portion of the first liquid exiting through the second plurality of apertures cools the non-ablative tip face.

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