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采用数值模拟方法研究了40°螺旋角时螺旋折流板换热器双螺旋和中间搭接两种折流板布置形式对壳程性能与螺旋流动的影响,并与30°和40°螺旋角时单螺旋连续搭接结构的进行了对比。结果表明,40°螺旋角时双螺旋和中间搭接结构会强化壳程流体的螺旋流动,使同流量下壳程换热系数与压降增加,但同压降下的换热系数显著下降且均低于30°螺旋角单螺旋连续搭接结构的换热系数。
The effects of double baffle and intermediate lap baffles on helical flow and shell-side behavior of helical baffle heat exchanger with a helical baffle heat exchanger at 40 ° helix angle were investigated by numerical simulation. When a single spiral continuous lap structure were compared. The results show that the double helix and the intermediate lap structure strengthen the spiral flow of the shell fluid at the helix angle of 40 ° and increase the shell heat transfer coefficient and pressure drop under the same flow rate. However, the heat transfer coefficient under the same pressure drop significantly decreases Both were lower than the 30 ° helical angle single spiral continuous lap structure of the heat transfer coefficient.