Numerical analysis of ship flue gas diffusion characteristics and influence on air intake under calm weather

ObjectiveIn order to prevent flue gas from polluting the ship deck and air intake, a numerical analysis of flue gas diffusion characteristics is carried out. MethodsFirst, a flue gas 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 exhaust temperature on the flue gas diffusion process in a static wind environment is studied in order to understand the mechanisms of the flue gas deposition and diffusion processes, and the influence of flue gas on the ship's air intake is further analyzed. ResultsThe results show that the exhaust 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 static windy environment, the pollution is concentrated in the middle of the ship; when the exhaust temperature reaches 417 K, the flue gas will not settle significantly but directly diffuse into the normal temperature environment. ConclusionThe results of this study can provide a theoretical basis for the design of ship exhaust parameters and air intake layout.

Abstract licence: CC BY

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