CFD technology-based simulation analysis method for aircraft air circulation refrigeration system

Abstract

The invention discloses a CFD technology-based simulation analysis method for an aircraft air circulation refrigeration system. The method comprises the following steps of establishing a geometric model of the aircraft air circulation refrigeration system; dividing and setting a control area; setting boundary conditions; dividing grids; establishing a control equation; performing numerical solution; and analyzing the simulation result, and predicting the refrigeration performance of the aircraft air circulation refrigeration system. According to the method, two-dimensional calculation simulation of the airplane air circulation refrigerating system is achieved through the commercial calculation fluid software Fluent, the refrigerating performance of the refrigerating system can be predictedwithin a short time, and the research and development cost is greatly reduced. By analyzing the temperature field, pressure field and flow field distribution in the refrigeration system, the operation mechanism and fluid characteristics in the refrigeration system are deeply understood, and the method is of great significance to design optimization of the aircraft air circulation refrigeration system.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a simulation analysis method of an aircraft air cycle refrigeration system based on CFD technology. Background technique [0002] The air conditioning system on an aircraft is divided into four subsystems: refrigeration system, temperature control system, air distribution system and pressurization control system. The most important of these is the refrigeration system, and the core of the refrigeration system is the air circulation refrigerator. At present, the two most competitive companies in aircraft manufacturing and research and development in the world are Boeing of the United States and Airbus of Europe. Table 1 summarizes the types of air-cycle refrigerators used on Boeing and Airbus aircraft. At present, the most widely used aircraft air circulation refrigerator adopts a three-wheel or four-wheel booster high-pressure water removal circulation system, which has a...

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Problems solved by technology

As for my country's first mainline civil aircraft C919 with independent intellectual property rights in accordance with the latest international airworthiness standards, its bleed air system still uses the engine bleed air method, and there is still a certain gap compared with the most advanced foreign technology.

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