摘要
以Fluent6.3为计算平台,利用其自定义函数功能,采用数值模拟的方法对焦炉荒煤气显热回收管束间的传热特性进行研究,探讨荒煤气的入口流速和初始温度对管束内流场和温度场的影响。研究结果表明:荒煤气在管束内是以绕流的方式流动,在管道的后面会形成流速很小的尾流漩涡。在换热管束第1排管道的后壁以及其余管道的前壁和后壁焦油易发生冷凝附着。提高荒煤气的入口流速和初始温度有利于减轻焦油附着,但随着荒煤气入口流速的增大和初始温度的升高,显热回收管束的热回收效率降低,荒煤气离开管束中时的平均温度升高。
The effects of inlet velocity and original temperature on flow field and temperature field in a sensible heat recovery tube bundle of coke oven crude gas and the heat transfer behavior between coke oven crude gas and water cooling tubes were numerically simulated by use of user-defined functions based on Fluent 6.3 software. The results indicate that the coke oven crude gas flows around the tubes in the tube bundle and the wake flow eddy whose velocity is very low lies the in the back of tubes. The easier condensation zone for coal tar lies in the bake of the first row tubes and the bake or front of the others. It has the advantage to avoid coal tar condensation by increasing inlet velocity and original temperature of crude gas, at the same time the sensible heat recovery efficiency decreases and the average temperature increases at the tube bundle outlet under the same condition.
出处
《中南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2017年第2期540-546,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(200809123)~~
关键词
焦炉荒煤气
显热回收
流场
温度场
管束
coke oven crude gas
sensible heat recovery
flow filed
temperature field
tube bundle