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The performance and stability of a high-speed centrifugal pump are closely related to its internal vortex flow. It's significant to study the vortex behaviours in a centrifugal pump, such as its coverage, distribution, physical properties, formation mechanism and energy loss, etc. To analyse these problems, the steady numerical simulations of a high-speed centrifugal pump were conducted using the...
Series-parallel centrifugal pumps, which have two conditions of low pressure and high pressure, play an important role in ship engineering, thus the research of its internal flow mechanism is of great significance. In this paper, the author gave a brief introduction to the structure of a series-parallel structure centrifugal. By using speed coefficient method, main geometric parameters of the impeller...
In this paper, the author tried to find out how clearance between impeller and tongue would affect the pressure fluctuation. By changing the diameter of the impeller, six transient simulations of a centrifugal pump were conducted. Data from different monitoring points were recorded and analyzed. The result shows that pressure fluctuation decreases with the increasing of the clearance. But the high-frequency...
The LNG-MRC3 is a small-scale natural gas liquefier. Its capacity is 3 cube meters per day. Building small-scale LNG plants have been proved with the development of LNG filling station. The liquefaction process has been optimized to enhance the economy of the small-scale LNG plant. In this paper, the same criteria are used to evaluate two types of liquefaction cycles, which include mixed refrigeration...
The properties of third-order dispersion (TOD) compensation of a double pumped ring fiber laser was simulated. Results of numerical simulation demonstrate that device performances are better than the laser with traditional structure.
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