|
|
|
| Numerical study on influence of elbow installation angle on pressure fluctuation in pipeline pump |
| WANG Yefu1, WANG Yang1, SONG Jianlong2, JIN Shibin3, GONG Xuran1, ZHU Rui4, CAO Puyu1* |
| 1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Hefei Huasheng Pumps Valves Co., Ltd., Hefei, Anhui 230000, China; 3. Wenling Bureau of Quality Supervision and Inspection, Wenling, Zhejiang 317500, China; 4. School of Energy and Power Engineering, Xi′an Jiaotong University, Xi′an, Shaanxi 710000, China |
|
|
|
|
Abstract To explore the influence of the relative circumferential position of the inlet elbow and volute on the hydraulic excitation in the centrifugal pump, a vertical centrifugal pipeline pump with elbow suction chamber was taken as the research object, and six groups of pump models with different circumferential installation angles were refitted based on the research object for numerical simulation. During the numerical calculation, the main body monitors the pressure fluctuation in the impeller region, and then the pressure fluctuation characteristics of the refitted pumps and the prototype pump in the impeller rotating region were compared and analyzed. The results show that in the inlet basin of the impeller, when φ=45°, the peak phase is advanced obviously in time domain, which counteracts with the trough of secondary vortex pair excitation and weakens the peak, with the maximum decrease of 40.6%. In the middle part of the impeller, the installation angle has a great influence on the pressure fluctuation at the back of the blade. In the blade trailing edge, the influence of different elbow installation angle decreases from impeller inlet to blade trailing edge. This study can provide some reference for the actual installation and optimization of pipeline pump.
|
|
Received: 08 March 2021
|
|
|
|
|
|
|
