In order to explore the internal wind field flow characteristics of T4-72 type\ncentrifugal fan, the three-dimensional model was established based on PRO/E\nsoftware. Combined with computational fluid Dynamics Software Fluent 6.3,\nthe standard model and SIMPLEC algorithm were used to simulate the wind\nfield inside the fan. Analysis of the flow characteristics, velocity distributed\nand pressure distributed of the internal fluid model of the T4-72 centrifugal\nfan, combined with the theoretical formula to obtain the full pressure, power\nand efficiency performance parameters of the fan. The centrifugal fan performance\ncurve is drawn. While compared with the experimental data, it is\nfound that the internal flow disturbance is strong when the fan is running\nunder low load condition and high load condition, which affects the performance\nof the fan and reduces the life of the fan. The numerical simulation\nresults are consistent with the experimental results. The overall performance\nparameters of the fan are in good agreement, verifying the reliability of the\nsimulation results; when the fan works between 1 - 1.4 times the rated flow\nrate, it can obtain a more stable flow field while maintaining higher efficiency,\nwhich provides a new idea for the optimization of the subsequent fan.
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