【作者】 张兆杰；

【导师】 高波；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2006， 硕士

【摘要】 本文以西南交通大学承担的863项目“磁浮交通沪杭线越黄浦江隧道的工程技术问题研究”与国家自然科学基金项目“隧道缓冲结构空气动力学特征试验”为依托,同时根据高速列车通过隧道时所产生流场的特征,建立了三维粘性、可压缩、不等熵、非定常流模型,通过对商用CFD软件FLUENT进行二次开发实现了高速铁路隧道空气动力学效应的数值仿真。 本课题针对高速列车通过隧道时诱发的空气动力学效应进行了深入研究,在国内首先提出对FLUENT进行二次开发,替代高速列车模型试验,并以软件工程理论为指导,运用面向对象的程序设计方法、高效的参数化建模技术以及多种软件协作技术,通过编程设计并实现了高速列车隧道空气动力学三维数值仿真系统,从而使研究人员从繁琐的建模过程中解放出来,专注于对计算方案的确定及计算结果的分析,极大地提高了设计优化的效率。本文使用FLUENT提供的用户自定义函数(UDF)接口,采用C语言对其进行二次开发,扩展了FLUENT的功能,以满足高速铁路隧道空气动力学研究中的复杂边界条件。此外,本文还开发了商用CFD软件与数据处理软件之间的数据接口,实现了计算结果的自动分析和整理,并且用可视化的技术,将枯燥的数据转化为直观的图形提供给用户。 本文针对国家高技术研究发展计划(863计划)课题“磁浮交通沪杭线越黄浦江隧道的工程技术问题研究”,在单洞单线和单洞双线两种工况下,对隧道洞口的合理结构形式和影响范围,以及洞口喇叭形入口缓冲段、多孔壁入口缓冲段以及隧道出口膨胀室对减缓微压波的作用进行了研究,得到了磁浮列车速度在100km/h～550km/h时隧道出口微压波最大值与速度的关系以及微压波最大值与测点距离的关系,比较了三种不同形式缓冲结构对微压波最大值的减缓效果,提出了隧道洞口的合理结构形式。最后对两种设计方案进行了比较,提出了合理的设计方案。更多还原

【Abstract】 The paper relies on the item of national high technology development project for the studying on the engineering techniques problems encountered when the magnetic suspension railway from Shanghai to Hangzhou passes the Huangpu River and the item of the national natural science fund undertaken by Southwest Jiaotong University for the experimental studying on the aerodynamic feature of tunnel-hood, according to the field features induced by a high-speed train entering into tunnels with or without hood to establish three-dimensional unsteady viscous compressible non-homentropic flow model to simulate aerodynamic effects through the secondary development of FLUENT.The paper puts the idea firstly domesticly to substitute the model experiment on the ground of the deep study on the areodynamic effects generated by a train passing through a tunnel, realizes the three-dimensional numerical simulation system guided by the software engineering theory, object-oriented programme design, high-efficiency parameter modeling technique and multiplicate software collabration technique. The system simplifies the modeling process of the tunnel and train and greatly improves the design and optimization efficiency in that the researchers can liberate themselves from the tedious modeling process, pay more attention to the confirmation of the compute scheme and the analysis of the results. The thesis expands the function of FLUENT through the secondary development on User Defined Function (UDF) provided by FLUENT with C language to meet the needs of the complex boundary condition of the study on high-speed train aerodynamic in tunnels. In addition, the thesis exploits the data interface between commercial CFD software and the data processing software, realizes the auto-analysis about the results and turn the tedious data to intuitionistic figure with the visualizatin technique.Based on the item of national high technology development project, the thesis studies the reasonable construction pattern of the tunnel portal, incidence of the micro-pressure wave and the the effect of bell-mouthed hood, lacunarishood and expansile hood on alleviating the micro-pressure wave in the situations of single line and double line, obtains the relationship between the max micro-pressure wave and the velocity of the train as well as the relationship between the max micro-pressure wave and distance of measuring point at the velocity of 100km/h-550km/h, compares the different alleviative effect of the three different hood to max micro-pressure wave and finally proposes the reasonable construction pattern of the tunnel portal. Finally, the thesis compares the two design schemes and put forward the more reasonale one.更多还原