【摘要】 为提高内螺纹管换热效率，采用Fortran语言编程，以水为介质(其Pr=5.42),对在雷诺数Re=20 000～60 000、螺旋角α=15～45°、齿高E=0.20～0.60 mm、齿条数Ns=20～52条件下，内螺纹管内流体周期性充分发展的湍流传热性能进行了研究。通过分析雷诺数Re、螺旋角α、齿高E、齿条数Ns的变化对努赛尔数Nu的影响，以及Nu关于Re的指数关系变化，得出了在研究范围内增大Re、α、E、Ns,均可提高内螺纹管换热能力的结论。其中螺旋角α对内螺纹管传热性能的影响最为明显，而齿条数Ns的增大对内螺纹管传热性能的影响并不显著。更多还原

【Abstract】 In order to enhance the heat transfer efficiency of the internal threaded pipe, Using Fortran programming simulation, with water(Pr=5.42) as the medium, the turbulent heat transfer performance of fluid in an internal threaded tube with periodic full development under the conditions of Reynolds number Re = 20 000 ～ 60 000, helix angle α = 15～45°, fin height E = 0.20 ～ 0.60 mm, fin number Ns = 20 ～ 52 was studied.The effects of changes in Reynolds number Re, helix angle α, fin height E and fin number Ns on Nusselt number Nu were analyzed, and the exponential relation change of Nu with respect to Re was obtained, it was concluded that the heat transfer capacity of inner threaded tubes could be improved by increasing Re, α, E and Ns. Among them, the helix angle α has the significant impact effect on the flow heat transfer of the internal threaded tube, while the increase of the fin number Ns has no a negligible effect on the heat transfer of the internal threaded tube.更多还原