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| Particle movement and blade erosion of diagonal flow pump for deep-sea mining |
| CHEN Wenhao1,ZHANG Shishuai1*,GAO Rui2,ZHENG Jun1,CHEN Junjun1 |
| 1. School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; 2. Hunan XEMC Changsha Pump Works Co. Ltd., Changsha, Hunan 410205, China |
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Abstract The k-ε turbulence model and Particle Transport Solid particle model were used to simulate the solid-liquid two-phase flow of a diagonal flow pump for deep-sea mining. The particle movement and blade erosion under different particle concentration(2%-12%)and particle diameter(1-30 mm)were compared and analyzed. The analysis shows that with the increase of particle concentration, the agglomeration of particles in the impeller inlet and the guide vane domain increases. The erosion areas of impellers and guide vanes gradually increase. Among them, the main erosion area of impellers is leading edge, the erosion area of the guide vanes is turning area and trailing edge. Both of them show the trend from top to bottom. The erosion area of guide vanes is larger than that of impellers. With the increase of particle diameter, the agglomeration of particles in the impeller outlet domain and guide vane runner decreases. The erosion trend and area are the same as different concentration. However, the main erosion area of impellers is pressure surface. At the trailing edge of the guide vane its erosion decreases. The results can provide theory evidence for optimum design of diagonal flow pump for deep-sea mining.
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Received: 09 May 2019
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