Figure 1.
Structure diagram of single-stage pump model.
Figure 1.
Structure diagram of single-stage pump model.
Figure 2.
Three-dimensional modeling of main overflow components. (a) Guide vane entity, (b) Guide vane water body, (c) Impeller entity, (d) Impeller water body.
Figure 2.
Three-dimensional modeling of main overflow components. (a) Guide vane entity, (b) Guide vane water body, (c) Impeller entity, (d) Impeller water body.
Figure 3.
Fluid computing domain of single-stage model pump.
Figure 3.
Fluid computing domain of single-stage model pump.
Figure 4.
Meshing of main flow through components. (a) Impeller, (b) Guide vane, (c) Front pump chamber, (d) Rear pump chamber, (e) Outlet section.
Figure 4.
Meshing of main flow through components. (a) Impeller, (b) Guide vane, (c) Front pump chamber, (d) Rear pump chamber, (e) Outlet section.
Figure 5.
Assembly meshing in the fluid computing domain.
Figure 5.
Assembly meshing in the fluid computing domain.
Figure 6.
Schematic diagram of the test bench.
Figure 6.
Schematic diagram of the test bench.
Figure 7.
Model pump installation illustration.
Figure 7.
Model pump installation illustration.
Figure 8.
Comparison of external characteristics of numerical simulation and test.
Figure 8.
Comparison of external characteristics of numerical simulation and test.
Figure 9.
Four groups of impellers with different blade outlet widths. (a) b2 = 24 mm, (b) b2 = 26 mm, (c) b2 = 28 mm, (d) b2 = 30 mm.
Figure 9.
Four groups of impellers with different blade outlet widths. (a) b2 = 24 mm, (b) b2 = 26 mm, (c) b2 = 28 mm, (d) b2 = 30 mm.
Figure 10.
External characteristic curve of different blade outlet widths. (a) Q-H, (b) Q-η.
Figure 10.
External characteristic curve of different blade outlet widths. (a) Q-H, (b) Q-η.
Figure 11.
Pressure distribution of impeller and guide vane with different b2 value. (a) b2 = 24 mm, (b) b2 = 26 mm, (c) b2 = 28 mm, (d) b2 = 30 mm.
Figure 11.
Pressure distribution of impeller and guide vane with different b2 value. (a) b2 = 24 mm, (b) b2 = 26 mm, (c) b2 = 28 mm, (d) b2 = 30 mm.
Figure 12.
Velocity distribution of impellers and guide vanes with different b2 values. (a) b2 = 24 mm, (b) b2 = 26 mm, (c) b2 = 28 mm, (d) b2 = 30 mm.
Figure 12.
Velocity distribution of impellers and guide vanes with different b2 values. (a) b2 = 24 mm, (b) b2 = 26 mm, (c) b2 = 28 mm, (d) b2 = 30 mm.
Figure 13.
Three-dimensional modeling of impeller and guide vane. (a) 6-blade impeller, (b) 7-blade impeller, (c) 8-blade impeller, (d) 5-blade guide vane, (e) 7-blade guide vane, (f) 9-blade guide vane.
Figure 13.
Three-dimensional modeling of impeller and guide vane. (a) 6-blade impeller, (b) 7-blade impeller, (c) 8-blade impeller, (d) 5-blade guide vane, (e) 7-blade guide vane, (f) 9-blade guide vane.
Figure 14.
Characteristic curves of various schemes when the impeller blade number is 6. (a) Q-H, (b) Q-η.
Figure 14.
Characteristic curves of various schemes when the impeller blade number is 6. (a) Q-H, (b) Q-η.
Figure 15.
Characteristic curves of various schemes when the impeller blade number is 7. (a) Q-H, (b) Q-η.
Figure 15.
Characteristic curves of various schemes when the impeller blade number is 7. (a) Q-H, (b) Q-η.
Figure 16.
Characteristic curves of various schemes when the impeller blade number is 8. (a) Q-H, (b) Q-η.
Figure 16.
Characteristic curves of various schemes when the impeller blade number is 8. (a) Q-H, (b) Q-η.
Figure 17.
Characteristic curves of different schemes when the guide vane number is 5. (a) Q-H, (b) Q-η.
Figure 17.
Characteristic curves of different schemes when the guide vane number is 5. (a) Q-H, (b) Q-η.
Figure 18.
Characteristic curves of different schemes when the guide vane number is 7. (a) Q-H, (b) Q-η.
Figure 18.
Characteristic curves of different schemes when the guide vane number is 7. (a) Q-H, (b) Q-η.
Figure 19.
Characteristic curves of different schemes when the guide vane number is 9. (a) Q-H, (b) Q-η.
Figure 19.
Characteristic curves of different schemes when the guide vane number is 9. (a) Q-H, (b) Q-η.
Figure 20.
Pressure distribution of different guide vane schemes under the 8-blade impeller. (a) 5-blade guide vane, (b) 7-blade guide vane, (c) 9-blade guide vane.
Figure 20.
Pressure distribution of different guide vane schemes under the 8-blade impeller. (a) 5-blade guide vane, (b) 7-blade guide vane, (c) 9-blade guide vane.
Figure 21.
Velocity distribution of different guide vane schemes under the 8-blade impeller. (a) 5-blade impeller, (b) 7-blade impeller, (c) 9-blade impeller.
Figure 21.
Velocity distribution of different guide vane schemes under the 8-blade impeller. (a) 5-blade impeller, (b) 7-blade impeller, (c) 9-blade impeller.
Figure 22.
Pressure distribution of different impeller blade numbers under the 7-blade guide vane. (a) 6-blade impeller, (b) 7-blade impeller, (c) 8-blade impeller.
Figure 22.
Pressure distribution of different impeller blade numbers under the 7-blade guide vane. (a) 6-blade impeller, (b) 7-blade impeller, (c) 8-blade impeller.
Figure 23.
Velocity distribution of different impeller blade numbers under the 7-blade guide vane. (a) 6-blade impeller, (b) 7-blade impeller, (c) 8-blade impeller.
Figure 23.
Velocity distribution of different impeller blade numbers under the 7-blade guide vane. (a) 6-blade impeller, (b) 7-blade impeller, (c) 8-blade impeller.
Figure 24.
Three-dimensional modeling of the four guide vanes. (a) Guide vane 1, (b) Guide vane 2, (c) Guide vane 3, (d) Guide vane 4.
Figure 24.
Three-dimensional modeling of the four guide vanes. (a) Guide vane 1, (b) Guide vane 2, (c) Guide vane 3, (d) Guide vane 4.
Figure 25.
External characteristic curve of the different throat area schemes. (a) Q-H, (b) Q-η.
Figure 25.
External characteristic curve of the different throat area schemes. (a) Q-H, (b) Q-η.
Figure 26.
Turbulence kinetic energy distribution of M1 scheme under different flow conditions. (a) 0.8Qdes, (b) 1.0Qdes, (c) 1.2Qdes.
Figure 26.
Turbulence kinetic energy distribution of M1 scheme under different flow conditions. (a) 0.8Qdes, (b) 1.0Qdes, (c) 1.2Qdes.
Figure 27.
Turbulence kinetic energy distribution of M3 scheme under different flow conditions. (a) 0.8Qdes, (b) 1.0Qdes, (c) 1.2Qdes.
Figure 27.
Turbulence kinetic energy distribution of M3 scheme under different flow conditions. (a) 0.8Qdes, (b) 1.0Qdes, (c) 1.2Qdes.
Table 1.
Main geometric parameters of the impeller and guide vane.
Table 1.
Main geometric parameters of the impeller and guide vane.
Symbol | Impeller | Symbol | Guide Vane |
---|
Dj | 222 mm | D3 | 402 mm |
Dh | 139 mm | b3 | 33 mm |
b2 | 27 mm | a3 | 25.8 mm |
D2 | 400 mm | b4 | 43.6 mm |
β2 | 25° | a4 | 38.4 mm |
φ | 130° | D4 | 560 mm |
Z | 6 | Zd | 9 |
Table 2.
Calculation of head under different grid numbers.
Table 2.
Calculation of head under different grid numbers.
Scheme | Total Number of Grids | Head H (m) |
---|
1 | 2,755,852 | 185.6 |
2 | 3,106,242 | 202.3 |
3 | 3,625,141 | 203.7 |
4 | 4,356,823 | 202.8 |
Table 3.
Blade outlet width scheme.
Table 3.
Blade outlet width scheme.
Scheme Number | 1 | 2 | 3 | 4 |
---|
b2 | 24 mm | 26 mm | 28 mm | 30 mm |
Table 4.
Scheme list.
Scheme | Number of Impeller Blades | Number of Guide Vanes |
---|
N1 | 6 | 5 |
N2 | 6 | 7 |
N3 | 6 | 9 |
N4 | 7 | 5 |
N5 | 7 | 7 |
N6 | 7 | 9 |
N7 | 8 | 5 |
N8 | 8 | 7 |
N9 | 8 | 9 |
Table 5.
List of different guide vane throat area schemes.
Table 5.
List of different guide vane throat area schemes.
Scheme | Guide Vane | a3/mm | b3/mm | Fd/mm | Yd |
---|
M1 | 1 | 29 | 30 | 6090 | 2.319 |
M2 | 2 | 29 | 33 | 6699 | 2.108 |
M3 | 3 | 29 | 36 | 7308 | 1.932 |
M4 | 4 | 34 | 36 | 8568 | 1.648 |