دوستان کسی میتونه مفهوم متن زیر رو بهم بگه...قسمت قرمز رنگ برام مهمتره:
Internal flow of the centrifugal pump impellers are made up of low velocity wakes zone and free
viscosity jets zone [5-7]. Figure 1 shows that the flow near the boundary layer has generated backflow
and stall because of...