US 11,753,994 B2
Fuel feed passages for an attritable engine
Lawrence A. Binek, Glastonbury, CT (US); and David W. Morganson, Marlborough, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Oct. 7, 2022, as Appl. No. 17/962,059.
Application 17/962,059 is a division of application No. 16/448,801, filed on Jun. 21, 2019, granted, now 11,465,247.
Prior Publication US 2023/0041714 A1, Feb. 9, 2023
Int. Cl. F28F 9/02 (2006.01); F28D 21/00 (2006.01); F02C 7/22 (2006.01); B23P 15/26 (2006.01); B33Y 80/00 (2015.01)
CPC F02C 7/222 (2013.01) [B23P 15/26 (2013.01); F28F 9/0265 (2013.01); B33Y 80/00 (2014.12); F28D 2021/0021 (2013.01); F28D 2021/0026 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of testing a fluid dispensing system in an engine that includes a fuel line and an N number of injectors, the method comprising:
applying cooling to an exterior surface adjacent each fuel feed passage for each of (N−1) injectors;
inducing a phase change to a flow test fluid in each of (N−1) fuel feed passages, preventing flow through each of (N−1) injectors; and
measuring a flow rate of the flow test fluid through a single unblocked injector.
 
10. A testing method, comprising:
providing a structure of an engine, the structure including a fuel line, a first injector, a second injector, a first fuel feed passage and a second fuel feed passage, the first fuel feed passage extending from the fuel line to the first injector, and the second fuel feed passage extending from the fuel line to the second injector;
disposing a flow test fluid in the first fuel feed passage;
cooling an exterior surface of the structure adjacent the first fuel feed passage to induce a phase change in the flow test fluid in the first fuel feed passage and thereby block fluid flow through the first injector, wherein the second injector remains unblocked; and
measuring a flow rate of the flow test fluid through the second injector.