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一、引言 并联管组在工程实施中,特别是在动力热能工程、石油化工工程、原子能工程以及太阳能工程中有着广泛的应用。流体在并联管组中的流动状况,往往直接关系到设备的利用效率的高低、能源消耗的多少和安全可靠性。 目前,国内外对并联管组已有不少研究,也出现了几个较好的数学模型。但这些研究大都只针对某些特殊工况:文献[1—4]即对于集箱短、支管长的管组进行了论论而得到的一些近似解和实验结果,认为在分流集箱中流体静压沿程递增(参阅图三中a、b、d),C型布置
I. INTRODUCTION Parallel pipelines have a wide range of applications in engineering implementation, especially in dynamic thermal engineering, petrochemical engineering, atomic energy engineering and solar energy engineering. Fluid flow in the parallel pipe group, often directly relates to the level of equipment utilization efficiency, the amount of energy consumption and safety and reliability. At present, there have been many researches on the parallel pipe unit both at home and abroad, and several good mathematical models have also appeared. However, most of these researches are only directed to some special conditions. Some approximate solutions and experimental results obtained from the literature [1-4], which discuss the tube sets with short headers and long branch pipes, conclude that in the diverting header fluid Static pressure increases along the way (see Figure 3 a, b, d), C-type layout