| 马建军.民用飞机实验室APU开车高温尾气排放影响因素分析[J].装备环境工程,2022,19(11):69-76. MA Jian-jun.Analysis of Influencing Factors of Discharging Civil Aircraft APU High Temperature Exhaust Gas from Climatic Laboratory[J].Equipment Environmental Engineering,2022,19(11):69-76. |
| 民用飞机实验室APU开车高温尾气排放影响因素分析 |
| Analysis of Influencing Factors of Discharging Civil Aircraft APU High Temperature Exhaust Gas from Climatic Laboratory |
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| DOI：10.7643/issn.1672-9242.2022.11.010 |
| 中文关键词: APU 高温尾气 气候实验室中图分类号:V216 文献标识码:A 文章编号:1672-9242(2022)11-0069-08 |
| 英文关键词:APU, high temperature exhaust gas, climatic environmental test chamber |
| 基金项目:国防基础科研(JCKY2020205B029) |
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| 中文摘要: |
| 目的 对民用飞机APU在气候实验室内开展极端气候环境下的起动和工作试验，建立一种APU高温尾气安全排放方法。方法 用CFD仿真手段对采用排气管道将APU高温尾气排出气候实验室的可行性及影响因素(包括管道直径、距离、背压等)进行系统性分析研究。结果 气管道入口距离APU管道出口过近时，将有利于APU排气，引射比ε与排气管道出口压力Pex及排气管道直径D线性相关，排放温度tex与管道直径D成反比。在排气管道入口设置平滑收敛段，利于消除涡流，减轻负压程度，并在一定范围内提高引射比。结论 采用管道被动排气是可行的，合适的排气管道设计为D/d=2.0，L/d=1.5，并在管道入口设置平滑收敛段。 |
| 英文摘要: |
| This research aims to carry out start-up and working tests under extreme climatic environments for civil aircraft APU in the climate laboratory, and establish a method for the safe discharge of APU high-temperature exhaust gas.CFD simulation method was used to systematically analyze and study the feasibility and influencing factors of using exhaust pipes to discharge APU high-temperature exhaust gas from the climate laboratory, including pipe diameter, distance, and back pressure.When the inlet of the exhaust pipe is too close to the outlet of the APU, it will facilitate the APU exhaust. The ejection ratio ε is linearly related to the outlet pressure Pex of the exhaust pipe and the diameter D of the exhaust pipe. The exhaust temperature tex is inversely proportional to the pipe diameter D. Furthermore, setting a smooth convergence section at the entrance of the exhaust pipe is beneficial to eliminate eddy currents, reduce the degree of negative pressure, and increase the ejection ratio within a certain range.In conclusion, it is feasible to adopt pipeline passive exhaust:A suitable exhaust pipeline design is D/d=2.0, L/d=1.5, and a smooth convergence section is set at the inlet of the pipeline. |
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