Dissertation > Industrial Technology > Machinery and Instrument Industry > Gas compression and transportation machinery > Fan > Centrifugal ( radial flow )

The Optimization and Numerical Simulation of Centrifugal Fan

Author YangChunYu
Tutor PanDiLin
School Anhui University of Technology
Course Fluid Machinery and Engineering
Keywords centrifugal fan CFD optimize design Diffuser internal leakage
Type Master's thesis
Year 2012
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The centrifugal fan which is a impeller mechanical equipment used to transporting fluid, is applied abroad in national economic, and plays a main role in energy-consuming agriculture production.With the consciousness-raising of the environmental protection and the development of the industry-agriculture, carefully designing^producing and proper using the fan is important to energy saving and emission reduction.Experiment research is an early method to study the interior fluid of impeller machinery. The method is usually used to research the resemble or the same problem, and consider the influencing factors altogether. However, the experiment research is ordinarily in the collar of the model dimension、boundary and so on. The means of experiment, precision of data, restriction of the instrument, environment are all lead to the finite of the analysis ability and cognition directly. At the same time, the high cost, long cycles limit the research of fluid of centrifugal fan. The modern optimize design is based on the theory of three-dimension calculate by professional soft. The new method which makes certain the parameters of the centrifugal fan main parts is redounding to simplify the calculation and prove the dependability.The numerical simulation has been performed for low pressure and rear vane type with the CFD soft Fluent in this article. The leading contents include:First, The interior fluid of centrifugal fan was been particularly research with CFD, that afford gist for after research; Second, the leak problem was studied in detail, and the influence in the case of eccentric situation of the impeller when installing centrifugal fan concluded; Third, Perform optimize design for diffuser, obtaining the optimal dimension of diffuser and carry out analysis particularly; Forth, Perform optimize design for volute tongue and get a conclusion:side-step volute tongue improves the effect of fan.

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