HAO Yu,LEI Fulin,ZHANG Zhedian.Effect of tube structure on methane micro-mixing combustion characteristics[J].Thermal Power Generation,2023,52(01):26-35.[doi:10.19666/j.rlfd.202206114]
喷管结构对甲烷微混燃烧特性的影响研究
- Title:
- Effect of tube structure on methane micro-mixing combustion characteristics
- 摘要:
- 微混燃烧是一种具有潜力的低污染燃烧技术，而作为基础单元的微管结构对燃烧特性有显著的影响。以单元微管模型燃烧器为对象，在空气预热加压和常温常压2组工况下，使用计算流体力学方法分析了不同微管直径、微管后段长度、火焰筒微管面积比时的甲烷微混燃烧特性。数值模拟结果表明：常温工况的火焰长度明显增长，并且增幅受到微管直径和面积比的影响较大；随着微管直径增大，火焰筒内流场和温度场基本相似，无量纲火焰长度变化不大，但是微管直径更小时2组工况的火焰长度变化更小，具有更好的适应性；随着微管后段长度增加，微管出口湍流强度大幅降低，火焰长度明显增加，2组工况下火焰长度的变化趋势较为一致；随着火焰筒与微管面积比增加，火焰长度有先缩短后增长的趋势，而面积比在4.0~9.0时火焰长度较短，燃烧性能较好。研究结果对燃气轮机燃烧室具有参考价值，对自由射流火焰也有一定的参考意义。
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（责任编辑 刘永强）
备注/Memo
蒿宇（1997），男，硕士研究生，主要研究方向为燃气轮机燃烧室，haoyu@iet.cn。
