International Journal of Science, Engineering and TechnologyAuthors: Vu Van Dong, Dong Tat Dat, Truong Huu Noi
Abstract: This paper presents a simulation study of the АL-31F engine fuel system using MATLAB/Simulink with the Simscape/SimHydraulics library, focusing on the main fuel supply branch, including the centrifugal pump, the gear pump, and the potential application of an electrically driven fuel pump. The simulation results show that the centrifugal pump exhibits a noticeable variation in flow rate under throttling and changes in rotational speed, whereas the gear pump maintains an almost stable flow rate, is less dependent on outlet pressure, and is not suitable for regulation by throttling alone. On this basis, the use of an electric drive for the fuel pump, especially for the gear pump, is considered a promising approach. It enables fuel flow regulation through pump rotational speed, thereby reducing fuel recirculation, limiting hydraulic losses, and improving the controllability of the fuel system.
DOI: http://doi.org/10.5281/zenodo.21642223
