对均匀空气流中微尺度甲烷扩散燃烧进行了数值模拟,重点考察微喷管内的流动和传热传质对微尺度燃烧特性的影响.研究结果表明,在保持燃料喷出速度一定的条件下,随着喷管直径的减小,喷管内与甲烷喷出速度相反方向上发生热量和质量的传递,燃料与空气的混合在喷管内已经发生,火焰的一部分热量回流到喷管内顶热了未燃混合气,同时也增加了火焰的热损失.当管径为0.15 mm时,甲烷在微喷管内就开始发生化学反应,在进行微尺度解析计算时,必须包含一定的喷管区域.
参考文献
| [1] | Spadaccini C M;Mehra A;Lee J et al.High Power Density Silicon Combustion System for Micro Gas Turbine Engines[J].Journal of Engineering for Gas Turbines and Power,Transactions of the ASME,2003,125:709-719. |
| [2] | Epstein A H.Millimeter-Scale MEMS Gas Turbine Engines[A].Atlanta,Georgia,USA,2003:1-28. |
| [3] | Ban H;Venkatesh S;Saito K .Convection-Diffusion Controlled Laminar Micro Flames[J].Journal of Heat Transfer,1994,116(04):954-959. |
| [4] | Matta L M;Neumeier Y;Lemon B et al.Characteristics of Micro Scale Diffusion Flames[J].Proceedings of the Combustion Institute,2003,29:933-939. |
| [5] | Ida T;Fuchihata M;Mizutani Y.Microscopic Diffusion Flame Structure with Micro Flames[A].Nagoya,Japan,2000 |
| [6] | Nakamura Y;Kubota A;Yamashita H.Near Extinction Flame Structure of Micro-Diffusion Flames[A].Tsukuba,Japan,2003 |
| [7] | 赵黛青,黄显峰,山下博史,张春林.微尺度甲烷扩散火焰特性的数值解析[J].燃烧科学与技术,2005(06):530-534. |
| [8] | Patanker S V.Numerical Heat Transfer and Fluid Flow[M].New York:Mcgraw-Hill Book Company Inc,1980 |
| [9] | Coffee T P;Kotlar A J;Miller M S .The Overall Reaction Concept in Premixed,Laminar,Steady-State Flame I Stoichiometries[J].Combustion and Flame,1983,54:155-169. |
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