低热值气体旋流燃烧器燃烧特性的数值研究  

Numerical Study of Combustion Characteristics of Low-calorific Value Gas Cyclone Burner

作　　者：钱叶剑 宫好奇 孟顺 张宇 葛鑫斌 刘博 QIAN Yejian;GONG Haoqi;MENG Shun;ZHANG Yu;GE Xinbin;LIU Bo(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Huaxia Blue Sky Mechanical and Electrical Equipment Co.,Ltd.,Chizhou 242800,Anhui Province,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009 [2]安徽华夏蓝天机电设备有限公司,安徽池州242800

出　　处：《动力工程学报》2024年第7期1019-1025,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(52274184);安徽省自然科学基金资助项目(1808085QE134);合肥市关键技术研究资助项目(J2020G33)。

摘　　要：针对我国低热值气体产量大、热值低、着火难、火焰稳定性差的问题,基于分级燃烧的思想设计了一款低热值气体燃烧器,其中心形成富燃的稳燃火焰,外围产生旋流燃烧火焰,在燃烧器出口设计了稳燃扩口,实现了低热值气体单燃烧器稳定燃烧。采用数值计算方法,建立了燃烧器计算模型,研究了预热温度对低热值气体燃烧器燃烧特性和污染物排放特性的影响,分析了空气预热和低热值气体预热时的速度场、温度场和NO排放情况。结果表明:随着预热温度的升高,最大回流速度增大,炉膛出口NO体积分数逐渐升高,低热值气体预热对燃烧的影响强于空气预热。In order to solve the problems of large output,low calorific value,difficult ignition and poor flame stability of low calorific value gas,a low-calorific value gas burner was designed based on the idea of staged combustion.A stable flame with rich combustion was formed in the center of the gas burner,and a swirl combustion flame was generated at the periphery,and a stable combustion flaring was designed at the outlet of the burner to achieve stable combustion of a single burner with low calorific value.The numerical calculation method was used to establish the calculation model of the burner.The effects of preheating temperature on the combustion characteristics and pollutant emission characteristics of low-calorific value gas burners were studied.And the velocity field,temperature field and NO emission during air preheating and low calorific value gas preheating were analyzed.Results show that with the increase of preheating temperature,the maximum reflux velocity increases,and the volume fraction of NO at the furnace outlet increases gradually.The effect of gas preheating with low calorific value on combustion is stronger than that of air preheating.

关 键 词：低热值气体 旋流燃烧器 燃烧特性 数值模拟 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]