Table 2

(a) Average values (present work)

Impeller 1.40–2.36 mm 1.00–1.40 mm 0.75–1.00 mm 6CB 4.82 4.91 5.31 6DT 4.50 4.77 5.05 6MFD 3.48 3.75 3.98

(b) The literature values [17]

Impeller BLGB ( = 0.6–0.71 mm) Bronze shot  ( = 0.5–0.6 mm) 6DT 0.33 0.17 5.12 5.72 0.25 7.33 6.58 0.33 8.37 6MFD 0.33 0.25 3.94 4.03