Abstract
Aero-fuel centrifugal pumps are important power plants in aero-engines. Unlike most of the existing centrifugal pumps, a combination impeller is integrated with the pump to improve performance. First, the critical geometrical parameters of the combination impeller and volute are given. Then, the effects of the combination impeller on the flow characteristics of the impeller and volute are clarified by comparing simulation results with that of the conventional impeller, where the effectiveness of the selected numerical method is validated by an acceptable agreement between simulation and experiment. Finally, the experiment is set to test the external performance of the studied pump. A significant feature of this study is that the flow characteristics are significantly ameliorated by reducing the flow losses that emerged in the impeller inlet, impeller outlet, and volute tongue. Correspondingly, the head and efficiency of a combination impeller are higher with comparison to a conventional impeller. Consequently, it is a promising approach in ameliorating the flow field and improving external performance by applying a combination impeller to an aero-fuel centrifugal pump.
Highlights
As an energy consuming turbo-machine, the centrifugal pump is of urgent demand for energy source in the industry due to its energy-saving potential
In [17], in order to predict the external performance of the pump, 3-D flow fields inside the pump are simulated by adjusting the blade outlet width and impeller outlet angle
A particular impeller can improve the reliability of pump operation by reducing the flow losses. It is very important for a centrifugal pump to understand its flow characteristics. This presents another motivation for this paper, which aims to realize the effects of a combination impeller on detailed flow characteristics by an effective numerical simulation method, while comparing with experimental data
Summary
As an energy consuming turbo-machine, the centrifugal pump is of urgent demand for energy source in the industry due to its energy-saving potential. In [17], in order to predict the external performance of the pump, 3-D flow fields inside the pump are simulated by adjusting the blade outlet width and impeller outlet angle. A particular impeller can improve the reliability of pump operation by reducing the flow losses From this review, it is very important for a centrifugal pump to understand its flow characteristics. It is very important for a centrifugal pump to understand its flow characteristics This presents another motivation for this paper, which aims to realize the effects of a combination impeller on detailed flow characteristics by an effective numerical simulation method, while comparing with experimental data. It will be beneficial to have aero-fuel centrifugal pumps with the capability of suppressing serious flow instabilities under extreme conditions by equipping a combination impeller
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