The hazard of airflow backflow in the flow path of the centrifugal fan impeller?
1. Reflow itself is ineffective power, consumes power, and reduces fan efficiency;
2. Reflow is a turbulence that produces noise;
3. The returning gas occupies the flow channel, reduces the flow channel area, changes the wind speed and the airflow inlet and outlet angle, and reduces the fan efficiency;
Therefore, the impeller design should minimize the backflow of the airflow.
Reduce the reflow in design:
1. Simulate the optimal gas flow line to define the flow channel geometry;
2. Make good roundness and rounded surface on the production, and reduce the gap of the joint;
3. The change in fluid velocity increase or decrease in the streamline geometry should be slowed down, and should not be increased or slowed down rapidly;
4. Where the pressure difference between the inside and the outside is large, try to increase the pressure loss and try not to make the backflow;
5. Increase the number of blades as appropriate to reduce the distance between the pressure surface and the suction surface.
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Label: The hazard of airflow backflow in the impeller of the centrifugal fan impeller?
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