Abstract:
Objective In order to prevent ship smoke from polluting the deck and air intake, a numerical analysis of ship smoke diffusion characteristics is carried out.
Methods First, a smoke diffusion model is established using the computational fluid dynamics (CFD) method, and statistical performance indicators are introduced to evaluate and verify the accuracy of the model. On this basis, the effect of flue gas release temperature on the ship smoke diffusion process in a calm weather environment is studied in order to understand the mechanisms of the smoke deposition and diffusion processes, and the influence of smoke on the ship's air inlet is further analyzed.
Results The results show that the release temperature determines the transition process of flue gas from a heavy gas cloud to a neutral gas cloud, thereby determining the diffusion/sedimentation effect. As flue gas diffuses vertically in calm weather, the pollution is concentrated in the middle of the ship; when the release temperature reaches 417K, the flue gas will not settle significantly but directly diffuse into the normal temperature environment.
Conclusion The results of this study can provide a theoretical basis for the design of ship exhaust parameters and air intake layout.
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