Oil transportation heat management system design method for controlling temperature rise of fuel oil of high-speed aircraft

Abstract

The invention provides an oil transportation heat management system design method for controlling the temperature rise of fuel oil of a high-speed aircraft, and the method comprises the steps: building a main oil tank heat transfer model without a built-in oil tank based on a main oil tank structure model; based on the fuel temperature rise curve of the main oil tank heat transfer model without the built-in oil tank, determining the fuel consumption at the fuel target temperature; determining the initial volume of the built-in oil tank based on the fuel consumption at the target fuel temperature; based on the main oil tank structure model and the initial volume of the built-in oil tank, establishing a main oil tank heat transfer model of the built-in oil tank; and determining the final volume of the built-in oil tank based on the highest temperature of the fuel oil temperature rise curve of the main oil tank heat transfer model with the built-in oil tank, the fuel oil target temperature and the initial volume of the built-in oil tank. The method can effectively reduce the temperature of the fuel at the flight tail section of the long-endurance high-speed aircraft, and can achieve the effects of reducing the cavitation risk of a fuel pump, reducing the pressurization pressure of a fuel tank, reducing the design difficulty of fuel passing equipment, increasing the available fuelheat sink of an engine and the like.

Description

technical field [0001] The invention relates to the technical field of high-speed aircraft fuel delivery and thermal management, in particular to a design method for a fuel delivery thermal management system for controlling the temperature rise of high-speed aircraft fuel. Background technique [0002] At present, the fuel tank body of the existing high-speed aircraft is not only used for storing fuel oil, but also plays the role of carrying the aircraft. Due to the high flight speed and severe aerodynamic heating, the temperature of the fuel in the cabin continues to rise after a long flight; especially at the end of the flight, the amount of fuel decreases and the temperature rise of the fuel accelerates. Elevated fuel temperature will make the pump inlet more prone to cavitation, and will also increase the risk of overtemperature failure of the oil passage valve. For high-speed aircraft that use fuel for active engine cooling, increased fuel temperature also increases th...

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Problems solved by technology

[0004] The present invention provides a design method for the thermal management system of fuel delivery for controlling the fuel temperature rise of high-speed aircraft, which can solve the problems of cavitation and overheating of fuel valves in high-speed aircraft fuel pumps in the prior art without reducing the fuel loading space. Technical problems of failure and engine wall overheating

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