中文摘要：

本文给出了三分螺旋折流板换热器几何参数的关系式,并分析了倾斜角为10°、15°、20°扇形、15°椭圆、20°扇形搭接的三分螺旋折流板换热器和弓形折流板换热器的传热和压降性能测试实验结果。结果显示20°扇形折流板方案的壳侧换热系数较高且压降较低,其性能指标ho/△po……1/3平均值比弓形折流板换热器的值高26%;20°扇形搭接方案与螺距相仿的15°扇形方案的性能大致相当;15°扇形方案比螺距较小的15°椭圆方案的性能更高。结果表明对换热器的性能起决定作用的不是折流板的倾斜角而是当量螺旋角。

英文摘要：

The formulas for calculation of geometric parameters of trisection baffled helix heat exchangers are presented.The performance test were conducted on a heat exchanger with replaceable tube bundles of inclined angles of 10°,15°and 20°sector baffles,15°ellipse baffles,20°overlapped sector baffles and segment baffles.The results show that the scheme of inclined angle 20°sector baffles which has the largest equivalent helix angle among the testing tube bundles has the highest shell-side heat transfer coefficient and low pressure drop,and its average integrated index h_o/△p_（o）~（1/3） is about 26%higher than that of scheme with segment baffles.The integrate performances are also similar of both inclined angle 15？ sector baffle scheme and inclined angle 20°overlapped sector baffle scheme that with similar equivalent helix angle.The integrate performance of inclined angle 15°sector baffle scheme is higher than that of inclined angle 15°ellipse baffle scheme,which indicates that the key factor is the equivalent helix angle rather than the inclined angle to determine the heat transfer performance.