Abstract
To improve the design speed and reduce the design cost for the previous blade design method, a modified inverse design method is presented. In the new method, after a series of physical and mathematical simplifications, a sail-like constrained area is proposed, which can be used to configure different runner blade shapes. Then, the new method is applied to redesign and optimize the runner blade of the scale core component of the 1400-MW canned nuclear coolant pump in an established multi-optimization system compromising the Computational Fluid Dynamics (CFD) analysis, the Response Surface Methodology (RSM) and the Non-dominated Sorting Genetic Algorithm-II (NSGA-II). After the execution of the optimization procedure, three optimal samples were ultimately obtained. Then, through comparative analysis using the target runner blade, it was found that the maximum efficiency improvement reached 1.6%, while the head improvement was about 10%. Overall, a promising runner blade inverse design method which will benefit the hydraulic design of the mixed-flow pump has been proposed.
Highlights
Mixed-flow pumps have the characteristics of both centrifugal pumps and axial pumps
4.1 Introduction to the Target Pump and Mesh Scheme 4.1.1 Target Pump Regarding the target pump, it is taken from the core component of the scale hydraulic model 1400-MW canned nuclear coolant pump
The hydraulic model here and the previously reported model [24] are from the same series with a relatively high performance, so that other details for the target pump can be obtained from the published paper
Summary
Mixed-flow pumps have the characteristics of both centrifugal pumps and axial pumps They are widely used in various areas, such as industrial chemistry, industrial water applications, nuclear industry. To design and optimize the blade shape, the distribution of the structural parameters, for instance the blade angles, were directly adjusted in previous studies [2,3,4]. This approach is highly dependent on the. Previous research [23] has established that water can be used as the fluid medium in the evaluation of the performance of canned nuclear coolant pump. The hydraulic model here and the previously reported model [24] are from the same series with a relatively high performance, so that other details for the target pump can be obtained from the published paper
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