Исследование пульсаций давления топлива и вибрации агрегатов топливной системы авиационного двигателя

Abstract

The article studies the intensity of flow ripple in the fuel system of an aircraft engine, excited by the main gear-type fuel pumps. These pressure fluctuations are identified as a destabilizing factor affecting the performance of the engine’s automatic control system (ACS), resulting in oscillatory behavior of actuating elements such as valves and slide valves. Furthermore, such pulsations introduce additional error into the regulation of fuel delivery to the combustion chamber. It is demonstrated that the magnitude of this error is governed by the ratio of pressure fluctuation amplitude within the fuel lines to the pressure drop across the fuel injectors. It is established that such values for the studied GTE are 0,1 ... 0,3, which leads to a significant error in fuel supply at reduced pressure drops on the fuel injectors or reduced engine operating modes.