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| Effect of sand mass fraction on wear of flow passage components in oil-gas multi-phase pump |
| SHI Guangtai1, GUO Xin1*, QIU Fushou2, ZHANG Li2 |
| 1. Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu, Sichuan 610039, China; 2. PetroChina Xinjiang Oilfield Company Experimental Testing Research Institute, Kelamayi, Xinjiang 834000, China |
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Abstract In order to study the influence of sand mass fraction on the wear of the flow passage components of the oil-gas multi-phase pump, the sand movement inside the oil-gas multi-phase pump was numerically calculated based on the DPM model, and the Finnie wear model was used to calculate the wear rate of the flow passage components of the oil-gas multi-phase pump. The results show that when the sand mass fraction is small, the sand particles and the fluid medium are mixed evenly. With the increase of sand mass fraction, the local concentration of sand particles in the pressurization unit significantly increases. The sand particles are concentrated on the pressure surface of the impeller and the middle of the diffuser channel. An increase of sand mass fraction will increase the wear area and wear rate sharply. In the impeller domain, the wear first occurs at the outlet of the pressure surface, and the suction surface undergoes punctate and strip wear at the outer edge of the inlet. In the diffuser domain, the wear of the pressure surface mainly occurs at the outer edge, and the wear of the suction surface mainly occurs at the inlet hub. From the quantitative analysis perspective, the wear rate of the impeller blade surface is generally greater than the wear rate of the diffuser blade surface, and the most serious wear position is the impeller blade inlet near the hub. The research results can provide some reference for improving the anti-wear performance of oil-gas multiphase pump and improving the actual operating life of oil-gas multi-phase pumps.
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Received: 13 July 2022
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