Table 4 Cascade density of each airfoil section under different schemes.

From: Experimental study and numerical simulation of internal flow dissipation mechanism of an axial-flow pump under different design parameters

Scheme

σ(i)

Section

I

II

III

IV

V

VI

VII

VIII

IX

X

XI

S1

0.7

0.71

0.73

0.74

0.76

0.78

0.81

0.84

0.88

0.93

1.00

S2

0.75

0.76

0.78

0.79

0.81

0.84

0.86

0.90

0.94

1.00

1.07

S3

0.8

0.81

0.83

0.85

0.87

0.89

0.92

0.96

1.00

1.06

1.15

S4

0.85

0.86

0.88

0.90

0.92

0.95

0.98

1.02

1.07

1.13

1.22

S5

0.9

0.92

0.93

0.95

0.98

1.00

1.04

1.08

1.13

1.20

1.29

S6

0.95

0.97

0.98

1.01

1.03

1.06

1.09

1.14

1.19

1.26

1.36

OS

1.0

1.02

1.04

1.06

1.08

1.12

1.15

1.20

1.25

1.33

1.43

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