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Research on Visualization of Inducer Cavitation of High-Speed Centrifugal Pump in Low Flow Conditions
| Content Provider | MDPI |
|---|---|
| Author | Xu, Zhenfa Kong, Fanyu Zhang, Hongli Zhang, Kun Wang, Jiaqiong Qiu, Ning |
| Copyright Year | 2021 |
| Description | Inducer is often used to improve the cavitation performance of pump. In order to study the cavitation characteristics of inducer under low flow condition of high-speed pump, high-speed photography technology was employed in this paper to carry out visual experiments on the inducer of a high-speed centrifugal pump. In low flow rates, Cavitation distribution and evolution among the inducer were captured. The experimental results revealed that a band-shaped backflow vortex in the inlet pipe would occur when the flow rate was less than 0.3 $Q_{d}$. Moreover, the backflow vortex in the inlet pipe rotated with the inducer and the rotational speed of backflow vortex was approximately half of the inducer. The visualization test of 0.27 $Q_{d}$ was carried out: when the NPSH was greater than 6.72 m, the bubbles in the inlet pipe were asymmetrical; When the NPSH dropped to 5.41 m, the cavitation was becoming less asymmetrical; When NPSH dropped to 3.81 m, cavitation evolved to the deteriorating stage, plenty of bubbles entered into the main impeller, resulting in a rapid decline of pump performance. Furthermore, the cavitation performance was worse at an extreme flow rate, and the NPSH value of 0.27 $Q_{d}$ was 7.5% greater than that under design condition. |
| Starting Page | 1240 |
| e-ISSN | 20771312 |
| DOI | 10.3390/jmse9111240 |
| Journal | Journal of Marine Science and Engineering |
| Issue Number | 11 |
| Volume Number | 9 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-08 |
| Access Restriction | Open |
| Subject Keyword | Journal of Marine Science and Engineering Inducer Cavitation Visual Experiments Net Positive Suction Head (npsh) Backflow Vortex |
| Content Type | Text |
| Resource Type | Article |
