文档介绍：第卷第期化工学报
62 S2
年月
2011 12 CIESC Journal December 2011
檭
檭檭檭檭檭殐殐
檭
檭研究论文双扭旋叶片组合形式对管内湍流换热性能的影响
殐
殐檭檭檭檭檭
檭
张静康铁鑫龚斌吴剑华
, , ,
沈阳化工大学机械工程学院辽宁沈阳
( , 110142)
摘要:在圆管内一个截面上安装两个扭旋叶片的组合形式会产生多个纵向涡,纵向涡的形式与强弱受相邻两组
叶片旋向和错位角的综合影响为探究各种组合形式对湍流换热性能的影响研究了种不同组合形式某一截
。, 6
面上速度与温度梯度和压力梯度的协同程度得出结论错位角对和压力降的影响明显大于叶片旋向的改
, : Nu
变。在近壁区,增加错位角可以提高速度与温度梯度的协同程度,而且相邻两组叶片旋向相反形式优于旋向相
同的形式;但旋向相同形式的速度与压力梯度的协同程度优于旋向相反形式,然而这种差距会随着错位角的增
加而减小当错位角为时在时协同程度非常接近
, 90° , y/R< 。
关键词:强化传热;双扭旋叶片;组合形式;场协同
DOI:.0438-
中图分类号文献标志码文章编号
:TK 124 :A :0438-1157 (2011)S2-052-09
Effect bination method of double-twisted blades
on turbulent convective heat transfer
ZHANG Jing,KANG Tiexin,GONG Bin,WU Jianhua
(College of Mechanical Engineering,Shenyang University of Chemical Technology,Shenyang110142,Liaoning,China)
Abstract: Multiple longitudinal vortex was made in a tube by double-twist elements incorporated in a
vortex form and strength were affected by two adjacent twist elements rotate direction and
dislocation effect of dislocation angle on Nusselt number and pressure drop was more significant than on
the elements rotate study the influence of binations of twisted element on turbulent heat
exchange performance,the coordination between velocity,temperature gradient and pressure