公开(公告)号：US20170122564A1

公开(公告)日：2017-05-04

申请号：US14926333

申请日：2015-10-29

Applicant: General Electric Company

Inventor： John Michael Cadman ,  Ronald D. Redden ,  Brian Matthias Schaldach ,  Randy Joseph Tobe

IPC: F23R3/28 ,  F02C3/04

CPC classification number: F23R3/28 ,  F23R3/283

Abstract: A fuel nozzle configured to channel fluid towards a combustion chamber defined within a gas turbine engine is provided. The fuel nozzle includes a first hollow tube and a second hollow tube concentrically aligned with the first hollow tube and defining a gap therebetween. The first hollow tube has a central passageway configured to channel fuel therethrough. The second hollow tube is typically in contact with compressor discharge gases and is therefore at a higher temperature than the first hollow tube. Thus, the fuel nozzle includes at least one detached or free spacer retained within the gap so as to minimize heat transfer between the first and second hollow tubes. Accordingly, the detached spacer(s) is un-joined or free within the gap where thermal energy transfer is disadvantageous.