The aircraft wastewater system is an important system for civil aircraft. The wastewater is transported through the pipeline under the pressure difference between the cabin and the vacuum wastewater tank, and its flow time and characteristics are crucial for the system design. In this paper, the gas–liquid–solid flow of aircraft wastewater is investigated using the Euler–Euler–Euler multiphase flow numerical simulation method. The influencing factors of wastewater flow are analyzed. Afterward, the impact of different factors on the flow time and characteristics is analyzed, such as pressure differences between the cabin and the tank, pipeline length, pipeline inner diameter, and the disturbance for a straight long pipeline. The results show that the wastewater flow time is reduced from 6.4 to 2.6 s with the increase in the pressure difference from 20 to 60 kPa and increased from 3.4 to 10.2 s with the increase in the pipeline length from 30 to 70 m. The results obtained provide a modern theoretical basis for the design of such systems of vacuum wastewater and have a wide range of applications not only in aviation but also in other modern kinds of transport (rail, shipping), contributing to reducing their negative impact on the environment.
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Investigation on gas–liquid–solid three-phase flow characteristics in aircraft wastewater pipes
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March 2024
Research Article|
March 21 2024
Investigation on gas–liquid–solid three-phase flow characteristics in aircraft wastewater pipes
Helei Zhang (张贺磊);
Helei Zhang (张贺磊)
a)
(Investigation, Writing – original draft)
1
School of Aero Engine, Zhengzhou University of Aeronautics
, Zhengzhou, China
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Xiande Fang (方贤德)
;
Xiande Fang (方贤德)
a)
(Writing – review & editing)
2
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics
, Nanjing, China
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Yuying Zhang (张玉莹);
Yuying Zhang (张玉莹)
(Resources)
3
Shanghai Aircraft Design and Research Institute of COMAC
, Shanghai, China
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Huixiang Wu (吴惠祥)
Huixiang Wu (吴惠祥)
(Formal analysis)
2
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics
, Nanjing, China
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Physics of Fluids 36, 033350 (2024)
Article history
Received:
January 20 2024
Accepted:
March 05 2024
Citation
Helei Zhang, Xiande Fang, Yuying Zhang, Huixiang Wu; Investigation on gas–liquid–solid three-phase flow characteristics in aircraft wastewater pipes. Physics of Fluids 1 March 2024; 36 (3): 033350. https://doi.org/10.1063/5.0198933
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