论文部分内容阅读
(一)前言螺旋槽管亦称轧槽管,简称 S 管,自1966年美国橡树岭国立实验室 Lawsons 等发表了实验报告后,国内外都进行了广泛深入的研究。华南工学院邓颂九等以及重庆大学程俊国等对其传热机理、流阻计算、优化设计等方面都做了大量甚有成效的工作。螺旋槽管不但可用于无相变流体的管内外传热强化,而且可用于有相变流体的管内、外冷凝强化,管内沸腾强化等。例如华南工学院化机教研室用 n=1,H=8mm,e=0.8mm,φ19×2mm 碳钢螺旋槽管与光滑管作了气——水型试验,在 Pr=0.692～5,Re=20,
(A) Preface Spiral groove tube, also known as groove tube, referred to as S tube, since 1966 American Oak Ridge National Laboratory Lawsons and other published experimental report, both at home and abroad have conducted extensive and in-depth research. South China University of Technology, Deng Songjiu and Chongqing University, Cheng Junguo, etc. on its heat transfer mechanism, flow resistance calculation, optimization design and so has done a lot of very effective work. Spiral groove tube can not only be used for non-phase-change fluid pipe heat transfer enhancement inside and outside, but also can be used for the phase change fluid pipe, outside the condensation strengthening, tube boiling enhancement. For example, the South China Institute of Technology Department of mechanized use of n = 1, H = 8mm, e = 0.8mm, φ19 × 2mm carbon steel spiral groove and smooth tube gas-water test conducted at Pr = 0.692 ~ 5, Re = 20,