Table 2
(a) Average 𝑆 values (present work)

𝑆
Impeller1.40–2.36 mm1.00–1.40 mm0.75–1.00 mm

6CB4.824.915.31
6DT4.504.775.05
6MFD3.483.753.98

(b) The literature 𝑆 values [17]

𝑆
Impeller 𝐷 / 𝑇 𝐶 / 𝑇 BLGB ( 𝑑 𝑝 = 0.6–0.71 mm)Bronze shot  ( 𝑑 𝑝 = 0.5–0.6 mm)

6DT0.330.175.125.72
0.257.336.58
0.338.37
6MFD0.330.253.944.03