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| Numerical Analysis of Exhaust Diffusion Characteristics for Civil Aircraft |
| Received:December 25, 2024 Revised:February 17, 2025 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2025.04.007 |
| KeyWord:CFD engine emissions buoyancy effect Coanda effect air pollution dispersion |
| Author | Institution |
| LUO Dingfa |
Xinjiang Airport Group Co., Urumqi , China |
| LI Likun |
School of Flight Technology, Civil Aviation Flight University of China, Sichuan Guanghan , China |
| WANG Bo |
Xinjiang Airport Group Co., Urumqi , China |
| YANG Junli |
School of Flight Technology, Civil Aviation Flight University of China, Sichuan Guanghan , China |
| XIAO Yi |
School of Flight Technology, Civil Aviation Flight University of China, Sichuan Guanghan , China |
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| Abstract: |
| The work aims to have an in-depth analysis on characteristics of the exhaust diffusion from an aircraft engine by means of Computational Fluid Dynamics (CFD) methods. Fluid dynamics control equations such as Navier-Stokes equations were utilized, and appropriate boundary conditions and initial conditions were set to establish the geometric model of the engine exhaust diffusion. The numerical simulation results of the exhaust under different wind speed conditions were analyzed, and the diffusion behaviors of the two main harmful gas components in the exhaust were also analyzed. The numerical simulation results showed the basic mechanism of diffusion behavior, where the exhaust was mainly close to the ground in the initial stage of development, and gradually lifted up and mixed with the air in the subsequent stages due to the temperature effect, and the effect of wind speed on the lifting behavior of the exhaust was demonstrated. The behavior of the engine exhaust diffusion is affected by a combination of wall and temperature effects, and the ambient wind speed affects the lift height of the jet. Under the experimental conditions, the wind speed increased from 2 m/s to 5 m/s and the lift height decreased by about 3 m. Ambient temperature has less effect on tailpipe dispersion. |
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