【作者】 华婷；

【导师】 平雪良；

【作者基本信息】 江南大学 ， 机械电子工程， 2009， 硕士

【摘要】 旋涡风机是吹吸两用的压力源和真空发生装置,它在国民经济中有着极为广泛的应用,研究旋涡风机的工作机理及工作性能具有重要的理论意义和现实指导作用。我国在旋涡风机工作机理的研究、设计和制造等方面与国际先进水平还存在较大差距。逆向工程的出现,为快速吸收和消化国际先进技术提供了一种快捷有效的手段。论文以国外一旋涡风机作为研究对象,运用逆向工程技术实现旋涡风机叶轮的逆向制造,在此过程中对涉及到的旋涡风机基本理论、逆向工程技术以及CFD流场分析技术做了深入而系统的研究。论文首先对旋涡风机作了详细介绍,分析其工作原理,推导了旋涡风机流场内的欧拉方程。提出了将逆向工程技术和CFD技术结合应用于旋涡风机的研究中,以旋涡风机唯一做功部件——叶轮为例,对测量过程做了详细的规划,采用接触式测量和非接触式测量相结合的方法完成叶轮的数据采集。在ImageWare中进行数据处理,提取叶轮几何模型的特征参数,并在三维软件PRO/E里完成叶轮的CAD模型。根据CAD模型,建立旋涡风机二维流动模型,在FLUENT内探讨纵向旋涡的形成过程,从压力分布图、速度矢量分布图等方面分析旋涡风机的流动过程及流动特征,计算结果与已有文献一致。将设计的叶轮实物化,分析其加工误差,定性研究了叶轮几何参数、气体流动速度、间隙及隔板等因素对旋涡风机性能的影响,利用现有仪器测得旋涡风机压力-流量关系曲线。本文的研究,提供了旋涡风机有效的测量数据和准确的CAD模型;通过旋涡风机的数值模拟,证实了纵向旋涡的存在,验证了前人旋涡理论假说的正确性;较成功地实现了叶轮的制造,明确了几何参数对旋涡风机性能的影响,为旋涡风机的设计、研究工作提供理论指导和依据。更多还原

【Abstract】 Regenerative blower is a pressure source for air blowing and drawing as well as a vacuum deaerating device which is widely used in national economy. So the research on regenerative blower’s work principle and performances is of both theoretical and practical significance. However, China still lags far behind advanced international standards in such aspects as the research of regenerative blower’s work principle, its design and manufacture etc. Fortunately, reverse engineering (RE) can provide an effective shortcut to the digestion and absorption of international advanced technology. This thesis which takes a foreign regenerative blower as the research object realizes the reverse manufacturing of impeller by making use of the RE technology, while at the same time makes an in-depth and systemized research on the basic principles of the regenerative blower, RE technology and computational fluid dynamics (CFD) analysis technology.The regenerative blower’s theory is introduced firstly in detail in the thesis, including the blower’s work principle and Euler equation. It is then proposed to study the blower integrating RE and CFD technology. As the blower’s only working part, the impeller is taken as an example to present the reverse design process, including data collection, data processing, feature extraction and CAD model reconstruction. According to the CAD model, the regenerative blower’s 2D flow model is established and the formation of longitudinal vortex is explored, then the flow characteristics are analyzed in the perspective of pressure distribution and velocity distribution etc in FLUENT. The results are in line with the existing literature. In accordance with the design of impeller, a new impeller is manufactured and its manufacturing error is detected. Some factors which have impacts on the blower’s performance are studied qualitatively. Finally, the P-Q curve is got.Effective measurement data and accurate CAD models are provided in the thesis. By numerical simulation, the existence of longitudinal vortices is confirmed and the correctness of the theoretical hypothesis of predecessors is verified at the same time. At last, a new impeller is manufactured successfully according to the reverse design, and the influence of the geometric parameters on the regenerative blower’s performance is nailed down, which lays a theoretical foundation for blower’s design and research.更多还原