SYSTEM FOR COOLING A FUEL INJECTOR EXTENDING INTO A COMBUSTION GAS FLOW FIELD AND METHOD FOR MANUFACTURE

摘要

A system for cooling a fuel injector extending into a combustion gas flow field includes a liner that defines a combustion gas flow path within a combustor and a fuel injector that extends through the liner. The fuel injector includes a main body having an annular first portion that extends outward from the liner and a second portion that extends from the first portion inward into the combustion gas flow path. The main body defines a cooling channel that is fully circumscribed within the main body and that extends between the first portion and the second portion. A cooling air inlet is defined within the annular first portion and is in fluid communication with the cooling channel. A cooling air outlet is in fluid communication with the cooling channel and is defined within the second portion downstream from the cooling air inlet.

主权项

1. A system for cooling a fuel injector extending into a combustion gas flow field, comprising:
a liner defining a combustion gas flow path; a fuel injector opening extending through the liner; a fuel injector having a main body extending through the fuel injector opening, the main body having an annular first portion partially disposed within the opening and extending outward from the liner, a second portion that extends from the first portion inward into the combustion gas flow path; and wherein the main body further defines:
a cooling channel fully circumscribed within the main body and extending between the first portion and the second portion;a cooling air inlet defined within the annular first portion, the cooling air inlet being in fluid communication with the cooling channel; anda cooling air outlet in fluid communication with the cooling channel downstream from the cooling air inlet.