Investigation into the Influence of Division Pier on the Internal Flow and Pulsation in the Outlet Conduit of an Axial-Flow Pump
Abstract
:1. Introduction
2. Numerical Simulation Method
2.1. Model Parameter
2.2. Grid Scheme and Boundary Conditions
2.2.1. Grid Scheme and Interface Setting
2.2.2. Boundary Conditions, Governing Equations and Turbulence Model
3. Test Equipment and Analysis Method
3.1. Test Equipment
3.2. Total Uncertainty Analysis
3.3. Measurement and Analysis of Pressure Fluctuation
4. Results and Discussion
4.1. Flow Field Analysis of Straight Outlet Conduit
4.2. Analysis of Static Pressure and Velocity
4.3. Analysis Results of Pressure Fluctuation Signal without Division Pier
4.4. Analysis Results of Pressure Fluctuation with Division Pier
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Nomenclature
Q | Flow rate |
Qbep | Optimal flow rate |
H | Head |
D | Impeller diameter |
η | Efficiency |
Total system error of test | |
f | Highest analysis frequency |
fs | Sampling frequency of pressure fluctuation test |
Eq | Systematic error of flow measurement |
Total system uncertainty of the test bed | |
Random uncertainty of the test bed | |
Eh | Systematic error of head measurement |
Em | Systematic error of torque measurement |
En | System error of speed measurement |
D | Wavelet packet |
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Overcurrent Parts | Elbow Inlet Conduit | Impeller | Guide Vane | 90° Elbow | Straight Outlet Conduit |
---|---|---|---|---|---|
y+ | 268.083 | 90.244 | 71.627 | 249.616 | 193.776 |
Scheme | Head Loss (m) | Left (Q/Qbep) | Right (Q/Qbep) | Flow Distribution Ratio |
---|---|---|---|---|
1 | 0.081 | 0.595 | 0.407 | 1.46 |
2 | 0.078 | 0.592 | 0.408 | 1.45 |
3 | 0.075 | 0.597 | 0.403 | 1.48 |
Category | No Division Pier | With Division Pier | ||||||
---|---|---|---|---|---|---|---|---|
Monitoring Point P1 | Monitoring Point P3 | Monitoring Point P1 | Monitoring Point P3 | |||||
Main Frequency/Hz | Power Spectrum/kPa2·Hz−1 | Main Frequency/Hz | Power Spectrum/kPa2·Hz−1 | Main Frequency/Hz | Power Spectrum/kPa2·Hz−1 | Main Frequency/Hz | Power Spectrum/kPa2·Hz−1 | |
0.6 Qbep | 1.46 | 0.0031 | 1.46 | 0.0027 | 1.95 | 0.0028 | 16.60 | 0.0022 |
Qbep | 1.95 | 0.0013 | 0.98 | 0.0131 | 25.88 | 0.0012 | 0.98 | 0.0033 |
1.2 Qbep | 1.46 | 0.0035 | 8.30 | 0.0059 | 1.46 | 0.0026 | 2.44 | 0.0045 |
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Yang, F.; Jiang, D.; Wang, T.; Chang, P.; Liu, C.; Liu, D. Investigation into the Influence of Division Pier on the Internal Flow and Pulsation in the Outlet Conduit of an Axial-Flow Pump. Appl. Sci. 2021, 11, 6774. https://doi.org/10.3390/app11156774
Yang F, Jiang D, Wang T, Chang P, Liu C, Liu D. Investigation into the Influence of Division Pier on the Internal Flow and Pulsation in the Outlet Conduit of an Axial-Flow Pump. Applied Sciences. 2021; 11(15):6774. https://doi.org/10.3390/app11156774
Chicago/Turabian StyleYang, Fan, Dongjin Jiang, Tieli Wang, Pengcheng Chang, Chao Liu, and Dongsheng Liu. 2021. "Investigation into the Influence of Division Pier on the Internal Flow and Pulsation in the Outlet Conduit of an Axial-Flow Pump" Applied Sciences 11, no. 15: 6774. https://doi.org/10.3390/app11156774