中文摘要：

提出了非连续螺旋折流板换热器的当量螺旋角定义,并建议以组合数ho/Δpo^1/3来反映换热器的综合性能。对可拆卸芯体管束折流板的倾斜角为10°扇形、15°扇形、15°椭圆、20°扇形、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进行了传热和压降性能测试实验。实验结果表明：其中当量螺旋角最大的20°倾斜角扇形折流板方案的壳侧换热系数最高且压降较低,其综合性能指标ho/Δpo^1/3比弓形折流板换热器的数值高26%左右;20°倾斜角扇形搭接方案与当量螺旋角相仿的15°倾斜角扇形方案的性能大致相当;15°扇形方案比当量螺旋角较小的15°椭圆方案的性能更高。可见对换热器的性能起决定作用的是当量螺旋角而不是倾斜角;实验预示在当量螺旋角更大的范围存在最佳值。

英文摘要：

The definition of equivalent helix angle of helix heat exchanger with non-continuous baffles was proposed,and the integrated index ho/Δpo^1/3 was suggested for the evaluation of heat exchanger performance.The performance test was 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 baffle 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 ho/Δpo^1/3 is about 26% higher than that with segment baffle scheme.The integrate performances are also similar for both inclined angle 15°sector baffle scheme and inclined angle 20°overlapped sector baffle scheme 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.The results reveal that there is optimum equivalent helix angle in a larger scope than this test one.