Design method of aircraft apu exhaust system in laboratory

Abstract

The invention discloses a method for designing an aircraft APU exhaust system in a laboratory, comprising the steps of: 1. determining the diameter of the initial adjustment pipe; 2. specifying the length of the initial adjustment pipe; 3. determining the diameter of the drainage pipe; Whether the gas equipment can completely store the exhaust gas; 5. Selection of the fan; 6. Determine the mass flow rate of the spray cooling water; 7. Determine the number of spray cooling mechanisms. The invention provides a basis for the selection and design of the aircraft APU exhaust system in the laboratory, saves material resources and manpower, solves the problem of APU driving in the laboratory, and lays an important foundation for the development of the climate test in the laboratory. The high-temperature and high-pressure APU exhaust gas is completely discharged, which ensures the stability of the temperature and pressure in the laboratory, and the safety of the aircraft and test personnel. The high-temperature exhaust gas is cooled to ensure that the exhaust gas outside the laboratory will not be harmful to personnel outside the laboratory. cause harm.

Description

technical field [0001] The invention belongs to the technical field of APU drainage and exhaust system design during the opening process of an aircraft APU in a closed laboratory, and in particular relates to a design method for an aircraft APU exhaust system in a laboratory. Background technique [0002] To carry out climate experiments in the full-aircraft climate laboratory, it is necessary to turn on the aircraft APU to provide power for the aircraft. If the high-temperature and high-pressure exhaust gas discharged by the APU is directly discharged into the laboratory, it will not only destroy the temperature and pressure environment in the laboratory, but also accumulate in the laboratory, which will also pose a threat to the safety of the laboratory, the aircraft and even the test personnel. Therefore, when the aircraft APU is turned on in the laboratory, the exhaust gas needs to be discharged outside the laboratory. The aircraft APU exhaust equipment in the laborator...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a design method for the aircraft APU exhaust system in the laboratory to provide a basis for the selection and design of the aircraft APU exhaust system in the laboratory, and save material resources at the same time. It solves the problem of APU driving in the laboratory and lays an important foundation for the development of climate tests in the laboratory. It can completely discharge the high-temperature and high-pressure APU exhaust, ensuring the stability of the temperature and pressure in the laboratory. To ensure the safety of aircraft and test personnel, the high-temperature exhaust gas has been cooled to ensure that the exhaust gas outside the laboratory will not cause harm to personnel outside the laboratory, which is convenient for popularization and use

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