Abstract
Fuel flowrate control system and fuel thermal management are very important for aeroengine and the overall aircraft, and it has been researched for several decades. This survey paper makes a comprehensive and systematic overview on the exiting fuel flowrate regulation methods, thermal load of fuel metering units, fuel-based thermal management, and the fuel tank’s thermal management topology network with drain and recirculation. This paper firstly reviews the mechanism, technical advantages, and technical challenges of the fuel metering unit with flowrate control valve and constant pressure difference valve compensator, flowrate control valve and variable displacement pump-based pressure difference compensator, and motor-based flowrate regulation. Then, the technical characteristics of above fuel flowrate control methods related to thermal management are discussed and compared. Meanwhile, the behaviors of recirculated fuel flow within single tank system and dual tank system are explored. Thirdly, the paper discusses the future directions of fuel flowrate control and thermal management. The survey is significant to the fuel flowrate control and fuel thermal management of the aircraft.
Highlights
Aeroengine is the power and heart of the aircraft
In the FADEC system, the flow area of directly driven valve (DDV), i.e., metering valve, is proportional to the linear displacement of voice coil actuator (VCA), and the pressure compensated valve can maintain the pressure-difference across DDV constant [33,34]
The pressure difference regulation principle of fuel control system (FCS) with pump-based flowrate control is as follows: the inlet pressure of FCS increases with the increasing of chambers can be closed off by the spool shoulder, and the spool of the slave piston can be maintained in a certain position, which means the displacement of the fuel pump remains unchanged
Summary
Aeroengine is the power and heart of the aircraft. Fuel is used as fuel for aeroengine to produce the power of aircraft flight and heat sink to absorb thermal load in aircraft airborne system, and fuel flowrate control and fuel thermal management are always the key technologies of the aircraft. To overview the relative technology status and development are very important. This section briefly presents the related technologies to fuel flowrate control and fuel thermal management
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