Effects of Flow Rate and Viscosity on Slip Factor of Centrifugal Pump Handling Viscous Oils

Figure 11

Relative velocity vectors of flow in mid-span plane of the impellers with 𝛽_2𝑏 = 20°, 44° at 𝑄 = 3.4, and 6.0 L/s (BEP), (a)–(d) for 𝛽_2𝑏 = 20°, (e)–(h) 𝛽_2𝑏 = 44°, (a), (b), (e), and (f) for BEP, and (c), (d), (g) and (h) for low flow rate 3.4 L/s, left-water (1cSt), and right-oil (48cSt).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)