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首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Numerical Study of High-Temperature Air Combustion Using Different Jet Nozzle
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Numerical Study of High-Temperature Air Combustion Using Different Jet Nozzle

机译：不同喷嘴对高温空气燃烧的数值研究

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High-Temperature Air Combustion (HTAC) is an advanced combustion technology with the advantage of energy saving and low nitrogen oxide pollutant emission. A swirling burner was designed to further improve the HTAC performance and a numerical simulation was carried out based on CFD technology to investigate the combustion process of methane under different jet parameters. The RSM turbulence model was used to calculate the turbulent flow and EBU combustion model was used to calculate the combustion process of methane gas. DO radiation model was applied to simulate heat transfer between the furnace walls and the flue gas. A full mechanism of NOX production and reduction was considered, i.e. the thermal and prompt NOX, the N2O inter-media path to form NO and the NO reduction by reburning. Experimental data from published papers were used to validate the present model. Numerical results showed that a swirling burner could enhance there circulation of the flue gas in the furnace to enlarge low oxygen area, resulting in a more uniform temperature field with a lower temperature uniformity ratio, which determined the final low emission of NO.
机译：高温空气燃烧（HTAC）是一种先进的燃烧技术，具有节能，低氮氧化物排放的优点。设计了旋流燃烧器以进一步提高HTAC性能，并基于CFD技术进行了数值模拟，以研究甲烷在不同射流参数下的燃烧过程。用RSM湍流模型计算湍流，用EBU燃烧模型计算甲烷的燃烧过程。使用DO辐射模型来模拟炉壁和烟气之间的传热。考虑了NOx产生和还原的完整机制，即热NOx和即时NOX，N2O形成NO的中间介质路径和通过再燃烧还原NO的机制。来自已发表论文的实验数据用于验证该模型。数值结果表明，旋流燃烧器可以增强炉内烟气的流通，从而扩大低氧区域，从而使温度场更加均匀，温度均匀性比降低，从而最终确定了NO的低排放量。

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