摘要
以生物质热风炉为研究对象,搭建生物质热风炉实验台,控制空气入口速度为12~20 m/s,开展相关测试实验。采用Realizable k-ε湍流模型,速度和压力的耦合采用SIMPLEC算法,利用FLUENT软件计算得到换热器温度、速度、压力分布,将模拟结果与实验测试结果进行比较,误差在2%以内。结果表明:随着壳程空气流速的逐渐增大,换热器的壳程温差ΔT、压降Δp逐渐升高;对流传热系数、总传热系数、传热量和换热器评价指标η也逐渐增大。随着雷诺数增大,努塞尔数和传热因子逐渐增大。
Taking the biomass hot blast stove as the research object,a biomass hot blast stove test bench was built,the air inlet speed was controlled to 12 m/s to 20 m/s,and the related test experiments were carried out.Using Realizable k-εturbulence model,the SIMPLEC algorithm was adopted to couple the velocity and pressure,and the FLUENT software was used to calculate the heat exchanger temperature,velocity and pressure distributions,the simulation result is compared with the experimental test result,the error is within 2%.The results show that with the gradual increase of the shell-side air velocity,the shell-side temperature differenceΔT and pressure dropΔp of the heat exchanger increase gradually;the convective heat transfer coefficient,total heat transfer coefficient,heat transfer capacity and heat exchanger evaluation index also increase gradually.As the Reynolds number(Re)increases,the Nusselt number(Nu)and heat transfer factor(J)increase gradually.
作者
李琪飞
任慧刚
黄腾
李玉宏
LI Qi-fei;REN Hui-gang;HUANG Teng;LI Yu-hong(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,China,Post Code:730050;Key Laboratory of Fluid Machinery and System of Gansu Province,Lanzhou,China,Post Code:730050;Key Laboratory of Solar Power System Engineering of Gansu Province,Jiuquan,China,Post Code:735000)
出处
《热能动力工程》
CAS
CSCD
北大核心
2022年第2期137-147,共11页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金(52066011)
甘肃省高等学校产业支撑引导项目(2019C-20)。
关键词
热风炉蛇形换热器
空气入口速度
传热系数
传热因子
数值计算
serpentine heat exchanger of hot blast stove
air inlet velocity
heat transfer coefficient
heat transfer factor
numerical calculation
