Fuel supply system of aircraft engine taking LNG (Liquefied Natural Gas) as fuel and working mode thereof

Abstract

The invention discloses a fuel supply system of an aircraft engine taking an LNG (Liquefied Natural Gas) as a fuel and a working mode thereof. The fuel supply system comprises an LNG storage tank, a safe valve, a check valve, a buffer tank, a machinery pressure regulating valve, an electrically-controlled throttle valve, a gasification device, a pressure sensor, a PID controller, a low-temperature pump, a flow controller, a fuel oil branch pipe, a gas fuel nozzle and a combustor. According to the working mode of an engine, when an aircraft is in different flying states, by virtue of changing a used engine, the change of thrust needed by the aircraft is realized. The fuel supply system has the beneficial effects that by virtue of the harmonizing of the gasification device and the low-temperature pump, the demand on equipment number is lowered, the total mass of a fuel system and the system complexity are reduced, meanwhile the control system complexity is reduced, and the demand of the engine for fuel flow can be met; according to the different thrust output for the power system, an alternate working mode and a simultaneous working mode, which are different, of the engine are adopted according to different thrusts output by a power system, so that the transportation cost is lowered on the premise of ensuring that the needed thrust is provided.

Description

technical field [0001] The invention relates to the technical field of aircraft engines and fuel supply, in particular to a fuel supply system and working method applied to LNG-fueled aircraft engines. Background technique [0002] In order to meet the requirements of more environmentally friendly and economical aero-engines in the future, major countries in the aviation industry have conducted extensive research on controlling aero-engine pollutant emissions and reducing aviation fuel costs as key topics. Reducing the cost of aviation fuel and reducing the excessive reliance on petroleum-based aviation fuel have become two major problems that military aviation and civil aviation transportation industries need to solve urgently. In order to reduce the cost of aviation fuel and reduce the dependence on aviation kerosene, in the next 30 to 50 years, aviation fuel will be dominated by "ready-to-use" aviation alternative fuels that will not affect aircraft and engine hardware. ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the complexity of the fuel supply, control system and combustion system when the aero-engine uses dual fuel, and to adopt part of the engines to use aviation kerosene as fuel and the remaining engines to use LNG as fuel in multi-engine aircraft aircraft power system

Images