Fabrication and Test of a Fluidic Fuel-Control and Bleed-Air-Load-Control System for Gas Turbine Engines.

This program has produced a production fluidic fuel-control and bleed-air-load-control system which consists of a fuel control, a load valve, and a temperature sensor. Three sets of hardware were produced for use in a follow-on program. This hardware will be subjected to acceptance tests on the AiResearch Model GTCP85-180 gas turbine engine. The production system improved the steady-state performance over that demonstrated on the prototype control produced under the previous program. The fluidic circuits were designed to perform within specification limits when operated at altitude as well as high and low temperature conditions. Designs and drawings were modified wherever necessary to facilitate production. The system underwent engine and fuel bench testing to confirm design improvement and performance. As part of this testing, a 50-hour endurance bench test of the fuel control was performed. This test, as well as the engine tests conducted, identified minor problems with the fuel metering valve and the speed sensor which were easily corrected. The appropriate design changes were incorporated into the production configuration. The production fluidic fuel-control and bleed-air-load-control system performed satisfactorily, meeting the program and engine requirements and is therefore recommended for follow-on program testing. Author