摘要
采用基于k-e湍流模型、非预混化学反应模型、DO辐射传热模型的数值模拟方法,研究全氧燃烧玻璃熔窑火焰空间的温度场与流场分布。研究表明:火焰长度约为燃烧空间长度的2/3,其最高温度为2602℃,燃烧空间非火焰区平均温度为1290℃,辐射传热效率高。燃烧空间主要存在3个回流,其中流经火焰上下部空间的高温气体回流有效地与玻璃液面进行对流换热。在辐射与对流换热的综合作用下,玻璃液面上均匀分布5个高温区,玻璃液面平均温度约为1255℃,综合平均温差最大值约为5℃,温度分布非常均匀。烧嘴对面及烟道口附近的墙体温度约为1320℃,热冲侵蚀严重,其它燃烧空间的墙体温度约为1265℃。
In this paper, using numerical simulation method based on a standard k-ε turbulent model, the non-premixed combustion model and DO radiation model to solve the temperature and velocity field in all-oxygen combustion space. The research results show that the length of the flame is about two-thirds of the length of the combustion space and the highest temperature is 2602 ℃. In the no-flame area of combustion space area, the average temperature is 1290 ℃ and the efficiency of radiation heat transfer is high. The combustion space mainly exists three backflow and the high temperature gas that flows through the top and bottom space of the flame has effectively convective heat transfer with the glass surface. As the comprehensive function in the radiation and convection heat transfer, five high- temperature area uniformly distributes on the surface of glass, the average temperature of glass surface is about 1255 ℃ and the maximum of integrated mean temperature difference is about 5 ℃. The temperature distribution is very uniform. The temperature of the wall opposite the burner and near the smoke crossing is about 1320 ℃ and the thermal shock erosion is serious. The temperature of other wall of the combustion space is about 1265 ℃.
出处
《玻璃》
2016年第11期3-7,共5页
Glass
关键词
全氧燃烧
火焰空间
温度场
流场
CFD模拟
all-oxygen combustion, combustion space, temperature field
flow field, CFD simulation
