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首页> 外文期刊>The Transactions of the Royal Institution of Naval Architects >COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF NO_x AND OTHER POLLUTANTS IN THE MAN B&W 7S50MC MARINE ENGINE AND EFFECT OF EGR AND WATER ADDITION
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COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF NO_x AND OTHER POLLUTANTS IN THE MAN B&W 7S50MC MARINE ENGINE AND EFFECT OF EGR AND WATER ADDITION

机译：MAN B＆W 7S50MC海洋发动机中NO_x和其他污染物的计算流体动力学分析以及EGR和加水的影响

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摘要

Marine engines represent a significant contribution to global emissions. In order to overcome this problem, a great attention was given to reduce their exhaust emissions in the last years, and marine engines have to adapt to regional, national and international restrictions. In this regard, the purpose of this paper is to develop a numerical model to study NO_x (oxides of nitrogen) and other pollutants in engines. EGR and water addition were studied too as measures to reduce NO_x. The main advantage of this study is that it provides a cheap and fast method to analyze emissions, contrary to experimental setups which are too expensive and laborious. Particularly, a commercial marine engine was analyzed and validated with experimental data. Results showed that increasing EGR and water addition leads to reduce NO_x, but increase carbon monoxide and unburnt hydrocarbons due to an incomplete combustion.
机译：船用发动机是全球排放的重要贡献。为了克服该问题，近几年来减少废气排放受到了极大的关注，船用发动机必须适应地区，国家和国际的限制。因此，本文的目的是建立一个数值模型来研究发动机中的NO_x（氮氧化物）和其他污染物。还研究了EGR和加水作为减少NO_x的措施。这项研究的主要优点是，它提供了一种便宜而快速的方法来分析排放，这与过于昂贵和费力的实验装置相反。特别是，对商用船用发动机进行了分析并通过实验数据进行了验证。结果表明，增加EGR和加水量会降低NO_x，但由于不完全燃烧会增加一氧化碳和未燃烧的碳氢化合物。

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