通过数值模拟的方法在雷诺数2 000～40 000范围内，对比分析了高效螺纹管与单向螺纹管在传热性能和压降性能的影响。结果显示，高效螺纹管由于交叉螺旋线使得壁面产生一定的宏观变形产生一个持续的湍流导致边界层减薄，管内螺旋线并没有使管内流体产生旋转流动，管内平均努塞尔数几乎为零，而单向螺纹管管内流体随螺旋线产生旋转流动；高效螺纹管受螺纹深度及螺旋角度影响较大，当H=0.7 mm时，努塞尔数增大1.57～1.83倍，但压降增大了3.83倍，当螺角为50°时努塞尔数增大1.76～1.89倍，但压降也增大了5.6倍，高效螺纹管深度为0.7 mm，螺旋角为50°时能够得到一个比较好的传热效果。

By means of numerical simulation,the effects of high-efficiency threaded pipe and single-structured tubes on heat transfer performance and pressure drop performance were compared and analyzed in the Reynolds number range of 2 000～40 000.Results show that,due to cross helical line,the highefficiency threaded pipe causes a certain macro deformation of the wall,resulting in a continuous turbulence leading to the thinning of the boundary layer.The spirals do not generate rotational flow in the tube,and the average ηu in a cross-sectional area is equal to 0.The efficient threaded pipe is greatly influenced by thread depth and helix angle.WhenH=0.7 mm,ηNu increases by 1.57～1.83 times,but the pressure drop increases by 3.83 times.Withb=50°,ηNu increases by 1.76～1.89 times,but the pressure drop has also increased 5.6 times.Through the performance ratio analysis,it can be seen that the effective threaded tube depth is 0.7 mm,and the helix angle is 50°,which produces a better heat transfer effect.

TK172

呼和浩特市科技计划项目（2015-高新-5）