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树优与长春工程大学联合研究成果《基于LBM-LES的汽车尾气CO排放研究》获ELSEVIER发表

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ELSEVIER 《Transporation and Environment》 正式发表树优与长春工程大学合作完成的《基于LBM-LES方法的汽车尾气CO排放研究》报告。本文着眼于汽车尾气对雾霾和环境污染的影响,首次运用LBM-LES相结合的CFD数值模拟方法,开展汽车怠速和行驶等多工况下CO扩散机制分析和实证研究,汽车尾气污染治理注入了新的研究思路本文一经发表,即得到来自法国相关风洞研究机构的高度重视,并受邀作为2017年10月西班牙NextLimit(达索旗下公司)第二届全球用户年会的主题发言,获得良好的反响。


Article title:

Research on CO dispersion of a vehicular exhaust plume using Lattice Boltzmann Method and Large Eddy Simulation

Article reference: TRD1470

Journal title: Transportation Research Part D

Final version published online: 19-Mar-2017

DOI information: 10.1016/j.trd.2017.03.012


Highlights

•A numerical approach has been developed for studying vehicle exhaust emission in urban road condition.

•Lattice Boltzmann Method and Large Eddy Turbulence model have been used for simulation.

•CO concentration and velocity distribution behind the exhaust plume has been investigated.

•The effectiveness of 3D simulation has been discussed in order to offer a better choice for engineer and architects.


Abstract

The exhaust gas dispersion from the vehicles has a direct impact on human health, particularly on vehicle drivers, passengers, and people nearby. Because of the numerical implementation simplicity and well captured solution for fluid dynamics around multiple bodies, Lattice Boltzmann Method (LBM) has been adopted in lots of domains during the last two decades. This paper combines LBM together with Large Eddy Simulation (LES) turbulence model to study exhaust gas emission and dispersion characteristics. Carbon monoxide (CO) relative concentration and velocity distribution from a vehicular exhaust plume in the near-wake region is investigated for low and high idling driving conditions under different ambient wind speeds. Validation has been made to test the performance of gas simulation of the LBM-LES method in XFlow, after which 3D simulation of exhaust gas dispersion is considered, and the time-averaged CO relative concentration and velocity are analyzed. Results indicate that flow wake by ambient wind can affect the dispersion of exhaust gas. The exhaust gas moves downstream and spread to a wider range under higher ambient wind speed. While, the flow field becomes complicated due to the interflow effect when the wind speed and exhaust gas velocity are close, which enhances the dispersion characteristics of exhaust gas to a certain extent.


Keywords

  • Exhaust gas dispersion;

  • Relative concentration;

  • LBM;

  • LES;

  • Pollutant;

  • Vehicle

点击此处PDF论文下载,或者登陆树优网站,进入"资料下载-> 下载教材案例-> Xflow无网格”,如下图: