Analysis of the Complex Three-Dimensional Flow Structure in the Circulation Pump of the Flow-Making System Based on Delayed Detached Eddy Simulation
Abstract
:1. Introduction
2. Numerical Simulation and Test Loop
2.1. Model Pump
2.2. Turbulence Model and Boundary Conditions
2.3. Mesh Generation
2.4. Test Loop
3. Experimental Validation
4. Result
4.1. Blade Surface Flow Analysis
4.2. Internal Vortex Structure
4.3. Flow Uniformity
- (1)
- Unevenness
- (2)
- Flow verticality
- (3)
- Speed uniformity index
- (4)
- Uniformity evaluation index based on area weighted average
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Abbreviations
Acronyms | |
CFD | Computational Fluid Dynamics |
DDES | Delayed Detached Eddy Simulation |
DES | Detached Eddy Simulation |
BVF | Boundary Vorticity Flow |
DMT | Derivative Moment Transformation |
Symbols | |
QN | Flow rate |
HN | Pump head |
n | Rotational speed |
ns | Specific speed |
D1 | Impeller inlet diameter |
D2 | Impeller outlet diameter |
Zi | Impeller blade number |
Zg | Guide vane blade number |
Zf | Front guide vane blade number |
Ϛ | Unevenness |
Flow verticality | |
γ | Speed uniformity index |
λ | Uniformity evaluation index based on area weighted average |
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Parameter | Value |
---|---|
Flow rate QN | 460,800 m3/h |
Pump head HN | 2.8 m |
Rotational speed n | 60 r/min |
Specific speed ns | 1145 |
Impeller blade number Zi | 7 |
Tip clearance | 6 mm |
Guide vane blade number Zg | 9 |
Front guide vane blade number Zf | 4 |
Impeller inlet diameter D1 | 6000 mm |
Impeller outlet diameter D2 | 6000 mm |
Parameter | Value |
---|---|
Flow rate QN | 4608 m3/h |
Pump head HN | 2.8 m |
Rotational speed n | 600 r/min |
Specific speed ns | 1145 |
Impeller blade number Zi | 7 |
Tip clearance | 0.6 mm |
Guide vane blade number Zg | 9 |
Front guide vane blade number Zf | 4 |
Impeller inlet diameter D1 | 600 mm |
Impeller outlet diameter D2 | 600 mm |
Grid Division Schemes | Impeller | Guide Vane | Total Number of Grids |
---|---|---|---|
1 | 1,656,789 | 1,545,652 | 4,654,234 |
2 | 1,865,448 | 1,845,487 | 5,454,876 |
3 | 2,254,665 | 2,044,548 | 6,546,445 |
4 | 3,331,710 | 2,849,253 | 9,850,983 |
5 | 4,125,842 | 3,045,456 | 11,456,687 |
Q/QN | Ϛi | (°) | γ | λ (%) |
---|---|---|---|---|
0.6 | 0.11 | 86.3 | 0.85 | 90.2 |
0.7 | 0.08 | 88.7 | 0.88 | 92.3 |
0.8 | 0.04 | 89.9 | 0.9 | 94.5 |
0.9 | 0.023 | 89.94 | 0.92 | 96.7 |
1.0 | 0.023 | 89.94 | 0.95 | 97.9 |
1.1 | 0.04 | 89.2 | 0.92 | 96.5 |
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Li, Z.; Ding, L.; Gong, W.; Ni, D.; Ma, C.; Sun, Y. Analysis of the Complex Three-Dimensional Flow Structure in the Circulation Pump of the Flow-Making System Based on Delayed Detached Eddy Simulation. Energies 2023, 16, 5643. https://doi.org/10.3390/en16155643
Li Z, Ding L, Gong W, Ni D, Ma C, Sun Y. Analysis of the Complex Three-Dimensional Flow Structure in the Circulation Pump of the Flow-Making System Based on Delayed Detached Eddy Simulation. Energies. 2023; 16(15):5643. https://doi.org/10.3390/en16155643
Chicago/Turabian StyleLi, Zhong, Lei Ding, Weifeng Gong, Dan Ni, Cunzhi Ma, and Yanna Sun. 2023. "Analysis of the Complex Three-Dimensional Flow Structure in the Circulation Pump of the Flow-Making System Based on Delayed Detached Eddy Simulation" Energies 16, no. 15: 5643. https://doi.org/10.3390/en16155643