RE Based Numerical Analysis Of Flow Field And Performance Research On Regenerative Blower

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.