| Axial flow fan(aerofoil fan), as the most important equipment of ventilation system, is widely used in mine, metallurgy and power industries,etc, and compared with centrifugal fan, the most outstanding character is huge flow and lower pressure head. Now,600MW unit is becoming the major units for power plants, and there is also a trending to develop for 1000MW unit. With the increasing capacity of single unit, the size and weight disadvantage of centrifugal fan is more and more obvious, therefore the axial flow fan (aerofoil fan) becomes an inevitable choice. Meanwhile, base on the variation on peak-valley of grid, most of the power plants are requested to undertake the peak shaving function, which caused the more application on moving blade adjustable axial flow fan(aerofoil fan), and study of whose performance is very important for energy-saving and loss reduction.First we analyze the performance of desulphurization booster fan at power plant, base on their practical operation status, we analyze the major parameters reflecting the fan performance, like safety allowance, actual running efficiency, etc., and find out the major existing problems, then propose related suggestions against them accordingly, which shall be useful for energy-saving and loss reduction of power plant.As per the actual measured dimension of axial flow fan, then build a model and meshing generation after converting to 3D coordinates in GAMBIT of Fluent software. Determine the computational domain and set up the boundary conditions, then transfer the meshing files to Fluent software, then using the pressure based solver to simulate the flow field in the fan.Analyze and simulate the flow character through changing the performance and structure parameters, such as flow of fan, impeller speed, blade setting angle. The test result shows the numerical simulation can better reflect the actual flow status of liquid, which is important for shortening the research cycle and reducing the research cost of fan products. |
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