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1、分类号:学校代码: UDC:学 号: 硕士学位论文（类 别：全日制硕士研究生题 目：轴流风机设计要素对性能影响的数值研究英文题目：The Numerical Research on Performance Effect for Design Elements of Axial Flow Fans学科名称：热能与动力工程 二一四年四月原创性声明本人声明：所呈交的学位论文是本人在导师的指导下进行的研究工作及取得的研究成果。除文中已经注明引用的内容外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得 内蒙古工业大学及其他教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的
2、任何贡献均已在论文中作了明确的说明并表示谢意。学位论文作者签名： 指导教师签名： 日 期： 日期： 学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，即：内蒙古工业大学有权将学位论文的全部或部分内容保留并向国家有关机构、部门送交学位论文的复印件和磁盘，允许编入有关数据库进行检索，也可以采用影印、缩印或其它复制手段保存、汇编学位论文。为保护学校和导师的知识产权，作者毕业后涉及该学位论文的主要内容或研究成果用于发表学术论文须征得内蒙古工业大学就读期间导师的同意，并且版权单位必须署名为内蒙古工业大学方可投稿或公开发表。本学位论文属于 保密，在 年解密后适用本授权书。不保密
3、。 （请在以上方框内打“”）学位论文作者签名： 指导教师签名： 日 期： 日期： 内蒙古工业大学硕士学位论文摘 要轴流风机在工业和生活中的应用极为广泛，同时也消耗大量能源。随着我国面临越来越大的环境治理和节能减排压力，研制开发和使用高效风机产品将是通风机行业重点关注的领域。T35型轴流通风机是我国使用了多年的通风换气产品，其应用范围也很广，但现有的T35风机效率还偏低。基于目前T35轴流风机效率偏低的现状，本文利用工程设计经验和现代设计方法研发了新T35轴流风机，并且研究了几个重要设计要素对其性能的影响。本文首先介绍了轴流通风机气动设计的工程方法特别是叶片设计，然后叙述了其进行风机气动性能模拟
4、的整机三维流场数值模拟方法，包括数值建模、网格划分、边界条件设置、收敛判据等，并进一步探讨了轴流风机在不同数值建模、不同风机出口静压后处理以及不同边界条件设置下的性能计算结果的差异。通过采用合适的建模方式和数值模拟后处理使得数值模拟结果可以与实测结果进行比较。通过网格试验得到了该风机的整机数值模拟网格，为后续讨论T35轴流风机的设计要素对其性能的影响奠定了基础。其次，本文在已有T35轴流风机的基础上得到了新T35轴流风机的设计雏形，同时对已有气动设计程序中的输入输出格式和部分经验参数设置进行了改进。改进后的程序不仅具有了高效灵活的特点，而且其可以很好的与后续的数值模拟进行衔接。在此基础上本文通
5、过对新T35轴流风机的三维数值模拟，研究了该风机的轮毂比、流型系数、叶片前倾和叶片前掠等设计要素对其性能的影响。最后通过上述研究得出结论为：随着轮毂比的增大风机全压会先略增大而后减小，随着轮毂比的增加风机效率大体上会逐渐减小。风机全压会随着流型系数的增大先增大后减小而后再增大，风机效率会随着流行系数的增大先增大而后减小。随着叶片前倾角的增大，风机全压和风机效率均会减小。风机全压会随着叶片前掠角的增大先微减小后增大而后减小，风机效率会随着叶片前掠角的增大而波动性递增。本文对以上的设计要素分析表明，T35轴流风机最佳的设计是轮毂比为0.35，流型系数为0.1，不适宜采用前倾，应该采用的是前掠。该设
6、计方案下T35轴流风机的性能比旧T35轴流风机的性能要好，其风机全压增加了36.3 Pa，风机的效率提高了5.3%。关键词: 轴流风机；设计要素；数值模拟；性能影响AbstractAxial flow fans have extensive application in industry and life, they also consume abundant energy. As our country is under increasing pressure of environmental governance, energy conservation and emission redu
7、ction, fan industry focus on the fields which are researching, developing and using high-efficiency fan products. The T35 axial flow fan is a kind of ventilation product used for many years in our country, its application range also is very wide, but the existing T35 fan efficiency is still not high
8、. Based on the current situation of inefficient T35 axial flow fan, this article developed the new T35 axial flow fan by using engineering design experience and modern design methods and studied the performance effect of several important design elements for it. Firstly，this article introduced engin
9、eering method of axial flow fan pneumatic design especially including vane design, then described the whole machine three-dimensional flow field numerical simulation method in conducting fan aerodynamic performance simulation, including numerical modeling, meshing, boundary conditions, convergence c
10、riterion and so on, and further discussed the performance calculation results difference of the fan under different numerical modeling, different fan outlet static pressure post-processing and different boundary condition settings. The numerical simulation results can be compared with the measured r
11、esults by adopting the appropriate modeling and numerical simulation post-processing. The whole machine numerical simulation grids of the fan is obtained by grid tests, so it is of important foundation for subsequent discussing performance effect of the T35 axial fans design elements. Secondly, the
12、article got a new T35 axial flow fan design prototype on the basis of the existing T35 axial flow fan, meanwhile improved input format, output format and partialexperience parameter settings for the existing pneumatic design procedure. The improved procedure not only has the characteristics of high-
13、efficiency and flexibility, and it can primely linkup subsequent numericalsimulation. On the basis through conducting three-dimensional numerical simulation of the new T35 axial flow fan, this article studied fan performance effect because of the fans design elements such as hub ratio, flow coeffici
14、ent, forward lean, forward swept and so on.Finally, through the above research, the conclusions are: Firstly, fan pressure increases slightly at first and then decreases with the increase of hub ratio, fan efficiency gradually decreases by and large with the increase of hub ratio. Secondly, fan pres
15、sure increases at first and then decreases and increases at last with the increase of flow coefficient, fan efficiency increases at first and then decreases with the increase of flow coefficient. Thirdly, fan pressure and fan efficiency decreases with the increase of forward lean angle. Finally, fan pressure decreases slightly at first and then increases and decreases at last with the increase of forward swept angle, fan efficiency volatility decreases with the in
