Internal Flow in Special Centrifugal Fan Based on CFD

FLUENT software of CFD technology was utilized to establish a dedicated fan model of 6HWF-20 high-range sprayer-duster and simulate internal flow field.The fan flow field velocity distribution and pressure distribution were obtained during the rotational velocity of 2 372 rmin after convergence of calculation.Internal flow field of fan was improved by changing the optimization of wind turbine blade inlet installation angle and volute tongue shape and size.The mean velocity of the fan outlet were obtainedand under 6 velocity，which was verified by tests.The results showed that the simulation results agreed well with the experimental results.It could be concluded that established simulated mechod based on the FLUENT software indicated fan model and the simulation method were feasible.It has important significance to improve the internal flow field of wind machine.The improvement of fan outlet velocity wuld increase the implementation of high-range spraying and dusting function using CFD technology.