The hazards of airflow backflow in the impeller of a centrifugal fan?
Therefore, the impeller design to minimize airflow refluxReduce backflow in design1. first simulate the best gas flow line to define the geometry size of the runner2. make sure that the true roundness and the round curved surface are controlled, and the gap between the connectors is reduced
3. in the streamline geometry, the increase or decrease of the fluid velocity should be slowed down, not rapidly increased or slowed down4., internal and external pressure differential parts, try to increase pressure loss, as far as possible not to return5. increase the number of blades properly, and reduce the distance between the pressure relief surface and the suction surface
1., reflux itself is ineffective power consumption power, reducing fan efficiency2. return flow is noise generated by noise flow3., the reflux gas takes up the flow path, reduces the flow channel area, changes the wind speed and the air inlet and outlet angle, and reduces the fan efficiency
