采用BoxBehnken方法，对新型螺旋管的传热性能和阻力性能的模拟计算进行实验设计。设定螺旋管内径、进口流速、螺旋槽波高、螺距和单节螺旋管与光滑管长度比5个影响因素，应用响应面法建立综合性能评价指标（PEC）与5个因素之间的二次多项式模型，确定螺旋管的最佳参数，对螺旋管强化传热机理进行研究。结果表明：换热管中的螺旋槽增加了换热面积，同时使流体产生周期性扰动，加快热量的传递；在实验优化范围内，螺旋管内径是影响PEC最显著的参数；换热管的最佳参数为：换热管内径25 mm，进口流速0.4 m/s，螺旋槽波高3 mm，单节螺旋管与光滑管长度比为1，螺距15 mm；在该条件下，计算得到努塞尔数为395.8，阻力系数为0.044，综合性能影响因子为3.82。

BoxBehnken method was used to experimentally design the simulated calculation of heat transfer performance and resistance performance of the novel spiral tube.Five influencing factors of spiral pipe inner diameter，inlet flow rate，spiral groove wave height，pitch and ratio of lengths of single section spiral tube and smooth tube were set，the response surface method was applied to establish comprehensive performance evaluation index (PEC) and quadratic polynomial model between these factors and determine the best parameters of spiral pipe，and the mechanism of heat transfer enhancement of spiral pipe was studied.The results show that the spiral groove in the heat exchange tube increases the heat transfer area and makes the fluid produce periodic disturbance，which speeds up the heat transfer.In the experimental optimization range，the inner diameter of spiral tube is the most significant parameter that affects the comprehensive performance evaluation index; the optimal parameters of the heat exchange tube are as follows: the inner diameter of the heat exchange tube is 25 mm，the inlet flow rate is 0.4 m/s，the spiral groove wave height is 3 mm，the ratio of the lengths of the single section spiral tube and smooth tube is 1，and the pitch is 15 mm.Under these conditions，the Nusselt number is 395.8，the drag coefficient is 0044，and the influence factor of comprehensive performance is 3.82.

TK124

武汉工程大学科学研究基金（K2021020）；2020年湖北省重点研发项目（2020BAB30）