Modelling of the Entire Aircraft Fuel System Through Simulink for Accurate Performance Evaluation

Abstract

Abstract As the primary fluid system in aircraft, the fuel system plays a vital role in storing, controlling, and continuously providing a clean flow of fuel to the engine throughout all flight phases. Considering that any fuel system malfunctions can lead to decreased engine performance and increased fuel consumption, it is crucial for the system to function efficiently to ensure aircraft safety and reliability. In gas turbine engines that utilize kerosene-based fuels, such as jet fuels, the fuel system comprises several components, including fuel tanks, fuel lines, centrifugal boost pumps, filters, main fuel pumps, fuel metering units (FMUs), and fuel injector nozzles. The FMU is of utmost importance since it regulates the fuel flow rate delivered to the combustion chamber and controls the angle position of the inlet guide vanes (IGVs). In light of the current dearth of comprehensive simulation models of aircraft fuel systems in the scientific literature, the goal of this paper is to create a highly accurate numerical code that reflects the entire fuel system of a gas turbine engine for aircraft. To ensure the accuracy of the proposed model, well established and referenced equations are used. Firstly, a layout for the fuel system is introduced, followed by an assessment of the computational model created using the software Simulink. Afterwards, the simulation results obtained via closed-loop control are presented and discussed.