Engine inlet fuel temperature regulating system

Abstract

The invention belongs to the technical field of aviation fuel, and in particular relates to an engine inlet fuel temperature regulating system. According to the system, in a form of connecting a plurality of stages of radiators in series stage by stage on an engine oil supply pipeline, sub-systems of an electromechanical system, such as a hydraulic system, an environmental control system and an inerting system, are cooled; a heat dissipation requirement is met; an oil supply pipeline leading to an engine is connected in parallel to an oil supply pipeline on which the radiators are located; two paths of fuel are intersected through a three-position electromagnetic valve at an engine inlet; the three-position electromagnetic valve is controlled to respectively convey cold fuel, hot fuel and cold-hot mixed fuel to the engine; the fuel is utilized for heat radiation to the greatest extent on the premise of meeting a fuel temperature requirement of the engine inlet. According to the system, a requirement on heat radiation of a plurality of systems through the fuel is met, the temperature of the fuel entering the engine inlet can be controlled through operation of the three-position electromagnetic valve, the heat radiation capacity of the fuel is utilized to the greatest extent, and the energy integration of an aircraft is realized.

Description

Technical field [0001] The invention belongs to the technical field of aviation fuel, and particularly relates to a system for adjusting the fuel temperature at the inlet of an engine. Background technique [0002] Existing airplanes largely use ram bleed air to dissipate the airborne systems of the airplane. This method requires openings on the outer surface of the airplane, which destroys the shape integrity of the airplane. At the same time, ram bleed air heat dissipation consumes the effective power of the aircraft engine and reduces the performance of the aircraft. In order to overcome the aforementioned shortcomings, occasionally, the engine oil supply pipeline is connected in series with the radiator to dissipate heat for other systems, but the power of the radiator is small and the number of radiators is small. With the development of aircraft electromechanical systems, it is required to be able to cool the heat sources of radiators of multiple systems at the same time. ...

AI Technical Summary

Problems solved by technology

[0002] Existing aircraft use ram bleed air to dissipate heat from the aircraft's on-board systems. This method requires openings on the outer surface of the aircraft, which destroys the integrity of the aircraft's shape

At the same time, the ram bleed air cooling consumes the effective power of the aircraft engine and reduces the performance of the aircraft

In order to overcome the above-mentioned shortcomings, it is occasionally used to dissipate heat for other systems by connecting the engine oil supply pipeline in series with the radiator, but only if the radiator has a small power and a small number of radiators

With the development of aircraft electromechanical systems, it is required to be able to cool the radiator heat sources of multiple systems at the same time. System heat dissipation is likely to cause the fuel temperature to exceed the engine inlet temperature, causing engine failure

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