摘要
提出壳程流体"斜向流"的新概念,解决了管壳式换热器性能提升的同时伴随流体流动阻力大幅增加的矛盾。研制了具有导向型折流栅管束支撑结构的新型高效节能斜向流管壳式换热器。采用场协同理论分析该换热器的强化传热机理,证明在此类换热器壳程中流体速度场与温度梯度场具有良好的协同关系。数值模拟了几何结构对传热和压降的影响规律,模拟结果与实验数据吻合良好。
For overcoming the contradiction between the performance improvement and fluid flow resistance increase in shell-and-tube heat exchanger,a new concept of "Sideling Flow" in shell side is presented,and a type of new high efficiency energy saving shell-and-tube heat exchanger with leading type shutter baffles in shell side,sideling flow heat exchanger is invented.Besides,the"Field Synergy Principle" is adopted to analyze its heat transfer enhancement mechanism,and it is indicated that there is the perfect synergy between the velocity field and temperature grads field in shell side of this type of new heat exchanger.Effects of the structure parameters on the fluid flow and heat transfer are investigated through numerical simulation,and the numerical results are in good agreement with the experimental data.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2010年第2期113-117,共5页
Nuclear Power Engineering
关键词
管壳式换热器
强化传热
导向型
斜向流
场协同
Shell-and-tube heat exchanger
Heat transfer enhancement
Leading type
Sideling flow
Field synergy