Effects of Geometrical Parameters in Gravitational Water Vortex Turbines with Conical Basin
Table 3
Runner sets with their design parameter values and optimum values.
Runner set and parameter
Runner
Design value
Maximum
Optimum a
Expb
Compc
Expb
Compc
% errord
Set 1—impact angle
R1
0.2902
0.4637
5.55
R2
0.2977
0.4804
R3
0.3082
0.4886
R4
0.2953
0.4756
Set 2—inlet/outlet blade angle in VP
R3
0.3082
0.4886
0
R5
0.2938
0.4688
R6
0.2816
0.4474
R7
0.2732
0.438
Set 3—inlet/outlet blade angle in HP
R3
0.3082
0.4886
13.33
R8
0.3231
0.4976
R9
0.3296
0.5149
R10
0.3113
0.4935
Set 4—taper angle
R9
0.3296
0.5149
17.85
R11
0.3479
0.5379
R12
0.3993
0.5685
R13
0.3876
0.5568
Set 5—height ratio
R12
0.27
0.3993
0.5685
0.315
0.32
1.59
R14
0.31
0.4052
0.5813
R15
0.35
0.409
0.594
R16
0.39
0.3888
0.5529
Set 6—cut ratio
R15
0
0.409
0.594
0.13
0.15
15.38
R17
0.1
0.4166
0.6059
R18
0.2
0.4325
0.615
R19
0.3
0.3899
0.591
Set 7—number of blades
R18
3
0.4325
0.615
5
5
0
R20
4
0.4603
0.6297
R21
5
0.4785
0.6402
R22
6
0.4623
0.6324
aOptimum value obtained from best fitted degree polynomial curve, Figures 1–17. These are probabilistic values rather than the actual values obtained from experiment or simulation. bExperimental data. cComputational data. dCalculated taking experimental data as a reference.
