化工学报 ›› 2019, Vol. 70 ›› Issue (9): 3353-3362.doi: 10.11949/0438-1157.20190350
Simin WANG1(),Lijuan SUN1,Chen SONG1,Zaoxiao ZHANG1,Jian WEN2(
)
摘要:
基于遗传聚集响应面模型和多目标遗传算法,研究了以螺旋扁管为换热管的折流杆换热器结构参数、入口速度对壳侧流动和换热性能的影响,并对螺旋扁管折流杆换热器的性能进行了优化分析。结果表明:传热系数随螺距的增大先减小9.38%,后维持不变;在低入口速度条件下,随长短轴之比的增大而增大,在高入口速度条件下,存在先减小后增大的趋势。压降随螺距的增大基本不变;随长短轴之比的增大减小了36.67%。由敏感性分析可知传热系数和压降对入口速度的变化最敏感,截面椭圆长短轴之比次之,对螺距最不敏感。优化后的螺旋扁管折流杆换热器结构比原结构单位压降下的传热系数平均提高了26.42%。
中图分类号:
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