Gas Turbine Fuel System and Combustion Study with High Temperature Fuel Injection

摘要

Combustion experiments have been conducted to assess the influence of fuel temperature on emissions and performance using a Rolls-Royce 501K combustor as a platform for the study. A total of 27 tests were conducted using (Jet-A) fuel at room temperature, 250 ℉, and 450 ℉ target fuel temperatures. Fuel was sparged to remove dissolved oxygen content for the high temperature tests; typical oxygen levels in the fuel at the delivery point to the test article were 0.2% of fully saturated values. Unburned hydrocarbon, carbon monoxide and NOx emissions were recorded for all conditions and high frequency pressure measurements were included in the combustor along with conventional pressure and temperature instrumentation. Combustor operation with heated fuel seems to generate measurable changes in combustion efficiency and noise content. Additionally, these phenomena seem to relate to variations in the operational envelope of the combustor.