Abstract
In order to meet the requirement of coal mine flooding emergency rescue, a high-power, high-head, and small-volume high-speed wet submersible pump has been designed. This article provides comparison and analysis for nine combination cases of different matching laws between the impeller blade number Z1 (Z1 = 5, 6, 7) and the diffuser vane blade number Z2 (Z2 = 8, 9, 10). The comparison of the pump performance and inner flow characters, such as the head, efficiency, radial force, and pressure pulsation coefficient, at different blade number matching of impeller and diffuser has been studied by the computational fluid dynamics software CFX. These are solved through the three-dimensional unsteady Reynolds-averaged Navier–Stokes equations with the shear-stress transport k–ω turbulence model. Furthermore, the computational fluid dynamics method is validated by experimental data collected in the laboratory. The results show that the combination of blade number of impeller and diffuser vane has a significant effe...
Highlights
The high efficiency of rescue in the coal mine flooding has been attracting more and more attention in recent years.[1,2,3,4] The rescue pump, which is a key component frequently used in drawing flooding water from the mine, determines the rescue time
The reason for the errors between the experimental and the numerical values may be due to the following parameters: the 3D model built in the software, the simulation method used in ANSYS, the grid number of the model, and the complex backflow
The numerical method used in this article can explain the nature of the pumping action and help obtain the mechanism of pump’s performance
Summary
The high efficiency of rescue in the coal mine flooding has been attracting more and more attention in recent years.[1,2,3,4] The rescue pump, which is a key component frequently used in drawing flooding water from the mine, determines the rescue time. The present rescue pump is too heavy and enormous to achieve rapid installation and operate under the mine. This becomes the main restriction element that affects the rescue time. This can be solved by designing an intense power, high-head, small-sized, and high-speed rescue pump. The design of the high-speed rescue pump presented in this article refers to the submersible pump. The series of pumps studied in this article, which filled the blank of this area, have an impetus effect not Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, China
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