摘要
采用有限元分析的方法,运用数值模拟软件fluent,对H型鳍片换热过程进行模拟求解。通过不同结构尺寸模型的建立,找出其高度、厚度、宽度、基管直径以及烟气流速变化对H型鳍片管鳍片平均温度及鳍片最高温度的影响规律。对模拟所得数据进行整理和分析,发现H型鳍片管的鳍片平均温度及鳍片最高温度与鳍片高度、宽度、烟气流速成正比例关系,应尽量避开h1/D>2.368、h2/D>2.368以后的区间范围;与鳍片厚度及基管直径反向相关,可尽量选择较大的基管直径。为H型鳍片管设计人员在选择各结构参数的时候提供参考依据。
In this thesis,the numerical simulation software —fluent was used to simulate the heat transfer process of H-fins,and the process was analyzed by finite element method. Models in various structural sizes were established which aimed at finding out how the height,thickness,width of fins as well as base tube diameter and flue gas velocity changes would influence the average temperature of H-type finned tube and the maximum temperature of fins. By analyzing the data gained from the simulation,we found that the temperature conditions of fins have proportional relations with their height,width,and the flue gas flow rate; the range beyond h1/D〉 2. 368 and h2/D〉 2. 368 should be avoided. The temperature was reverse related with fins＇ thickness and base tube diameter. A tube with larger diameter can be chosen. The research provides reliable reference for the designers in deciding H-type finned tubes＇ structure parameters.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2017年第4期100-104,共5页
Journal of North China Electric Power University：Natural Science Edition
关键词
H型鳍片
平均温度
最高温度
H-type fins
average temperature
maximum temperature
