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Modeling and Analysis of the Effects of Noise Barrier Shape and Inflow Conditions on Highway Automobiles Emission Dispersion

Wang, Shaoguang ; Wang, Xiuling

Fluids (Basel), 2019-08, Vol.4 (3), p.151 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
Modeling and Analysis of the Effects of Noise Barrier Shape and Inflow Conditions on Highway Automobiles Emission Dispersion
Autor: Wang, Shaoguang ; Wang, Xiuling
Assuntos: Acoustics ; Air pollution ; Automobiles ; CAD ; Carbon monoxide ; Computational fluid dynamics ; Computer aided design ; Dispersion ; Emission analysis ; emission dispersion ; Emissions ; Emissions control ; Inflow ; inflow conditions ; K-epsilon turbulence model ; Motor vehicles ; Noise ; Noise barriers ; Noise reduction ; Reynolds averaged Navier-Stokes method ; Reynolds number ; Roads & highways ; Shape effects ; Simulation ; T shape ; Turbulence models ; Turbulent flow ; Vehicle emissions ; Vehicles ; Viscosity ; Wind effects ; Wind shear
É parte de: Fluids (Basel), 2019-08, Vol.4 (3), p.151
Descrição: Recent research has suggested that noise barriers have significant impacts on near-road automobile emissions reduction. T-shaped noise barriers have better performance on reducing noise than others, however, their effects on automobile emissions reduction are not clear. In this research, commercial software ANSYS®Fluent 19.2 (Ansys Inc., Canonsburg, PA, USA) was applied to simulate the noise barrier shape and different inflow wind shear condition effects on highway automobiles emission dispersion. Various Reynolds Averaged Navier-Stokes (RANS) models were tested. The realizable k-ε turbulence model was selected to simulate the turbulent flow caused by fast moving vehicles on highway based on the comparison results. A non-reacting species transport model was applied to simulate emission dispersion. Results showed that the T-shaped barrier was able to help reduce highway automobiles emission concentration in downstream areas more than the rectangular barrier. An optimized range of the T-shape was proposed; under the inflow condition without wind shear, the noise barrier shape effects on automobiles emission reduction were not significant.
Editor: Basel: MDPI AG
Idioma: Inglês

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Modeling and Analysis of the Effects of Noise Barrier Shape and Inflow Conditions on Highway Automobiles Emission Dispersion

Wang, Shaoguang ; Wang, Xiuling

Basel: MDPI AG

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