【作者】 苏立建；

【导师】 董其伍；

【作者基本信息】 郑州大学 ， 化工过程机械， 2005， 硕士

【摘要】 高效节能过程装备的研究开发是当今工程节能的重要手段。换热器是化工、炼油、动力、食品、轻工、原子能、制药、航空及其他许多工业部门广泛使用的一种通用工艺设备。管壳式换热器由于结构可靠、技术成熟、适用面广，是目前国内外换热设备的主要结构形式。随着换热器强化传热研究技术和现代设计研究方法的长足进步，管壳式换热器不断获得改进和发展。本文采用理论分析、数值模拟和实验研究相结合的方式，进行了管壳式换热器壳程强化传热研究，在以下几个方面开展了研究和创新性工作： 1、深入研究了管壳式换热器壳程结构特点及流体流动和传热规律，特别对换热器壳程流体中的“斜向流”进行了研究。相对于现有壳程流体横向流、纵向流和螺旋流的流动状态，换热器壳程流体的倾斜流动状态兼有壳程流体横向流动和纵向流动所具有的传热和阻降性能的双重优势，从而发展了管壳式换热器壳程结构设计理念。 2、对壳程流体斜向流动的新型高效管壳式换热器一帘式折流片换热器进行了研究，这种换热器改进和发展了换热器壳程的结构形式。并给出了用于指导工程设计的壳程传热系数准数关联式和流体阻力降准数关联式。该换热器成功实现了壳程流体的倾斜流动，改善了壳程流体的流动状态，具有较强的壳程强化传热能力，为管壳式换热器升级换代提供了一种新的依据。 3、根据管壳式换热器的结构特点，应用新的数值模拟方法“管壳式换热器周期性全截面计算模型”，进行管壳式换热器壳程流体流动和传热的数值分析。这种数值模拟方法弥补了现有数值模拟建模方式的一些不足，实现了具有复杂壳程结构的管壳式换热器壳程流场和温度场的数值模拟，为进一步完善和发展换热器数值模拟技术起到了推动和促进作用。更多还原

【Abstract】 The research and development of energy saving process equipments is an important method to save energy nowadays. The heat exchanger is a kind of universal technologic equipment, which is widely used in many industries, such as chemical industry, oil refining, power generation, food industry, light industry, atomic energy installation, medicine manufacturing industry, aerospace industry and so on. Shell-and-tube heat exchanger has many advantages such as reliable structure, mature technique and wide applicability, so it is the mostly used structure in the internal and overseas applications of heat exchangers. The shell-and-tube heat exchanger gets continuous improvement and development with the great progress of the heat transfer enhancement technique and modern design and research method.The method which integrates theoretical analysis, numerical simulation and experiment is adopted to research the heat transfer enhancement technique for the shell-side of the shell-and-tube heat exchanger in the paper. The following main achievements and innovations are obtained.1. Structure characteristics of the shell-side of the shell-and-tube heat exchanger and laws of fluid flow and heat transfer are researched deeply, and "sideling flow" in the shell-side is researched especially. Which is relative to the flow states of the cross-flow, the longitudinal-flow and the helical-flow, this flow state makes the shell-and-tube heat exchanger have the integrative advantages of both the cross-flow heat exchanger and the longitudinal-flow heat exchanger, so it develops the structural design concept of the shell-side of the shell-and-tube heat exchanger.2. The new style energy saving shell-and-tube heat exchanger—shutter baffle heat exchanger is researched to improve and develop the structure of the shell-side. The effect of the structure and processing parameters on heat transfer and flow-resistance performance of the shutter baffle heat exchanger is also investigated, both the correlative equations of the heat transfer coefficient and the pressure drop in the shell-side are deduced. The kind of heat exchanger realizes sideling flow in the shell-side, improves the flow state in the shell-side, and has the ability of the heat transfer enhancement, which provides the well aided method for improving the shell-and-tube heat exchanger.3. According to the structure characteristics of the shell-and-tube heat exchanger, the更多还原