Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle

Figure 10

Inlet flow of the double-inlet-nozzle (a) and of the original casing (b) at stall conditions and discharge of the backflow at the gap in (a), 𝑄/𝑄_opt=0.3, 𝑐=(𝑐²_ax+𝑐²_𝑟)^1/2.

(a)

(b)