Double-volute hydraulic design method based on RSM model

Abstract

The invention discloses a double-volute hydraulic design method based on an RSM model. The design method comprises the steps of 1) solving double-volute initial hydraulic geometric parameters based on a velocity coefficient method; 2) performing optimization solving on double-volute key geometric parameters by adopting an RSM-based adaptive sequence algorithm; 3) performing parameterization automatic modeling based on a CATIA macroprogram, and outputting to obtain a three-dimensional double-volute model; 4) by adopting a GridPro script file to output a grid file used for numerical value calculation; 5) automatically completing grid loading and boundary condition setting based on a CFX CCL language drive program to complete calculation of related data, and outputting a calculation result; 6) repeatedly executing the steps 3) to 5) to obtain a double-volute scheme with the minimum total pressure loss coefficient; and 7) taking the data obtained in the steps 1) to 6) as the double-volute design parameters to manufacture a double-volute centrifugal pump. By adoption of the double-volute hydraulic design method, the double-volute hydraulic optimization design can be realized.

Description

technical field [0001] The invention belongs to the field of hydraulic design methods for fluid machinery (centrifugal pumps, water turbines, fans, etc.), in particular to a double volute hydraulic design method based on an RSM model, which is mainly used for fast and effective hydraulic design and optimization of double volute models , under the premise of ensuring the specified flow capacity, to reduce the hydraulic loss in the volute, further improve the efficiency of the hydraulic model, and achieve the purpose of energy saving and emission reduction. Background technique [0002] The double volute has two symmetrically arranged flow channels. Compared with the traditional single volute, it can effectively balance the radial force on the centrifugal impeller under off-design conditions, ensure the smooth operation of the pump, and have higher efficiency , so it is widely used in large centrifugal pumps (such as large split pumps) that require high stability. At present,...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing double volute hydraulic design method has the following disadvantages: 1) the design parameters rely too much on the experience of the designer and the selection of relevant experience coefficients; 2) the total pressure loss cannot be obtained quickly and effectively The smallest hydraulic model; 3) It is impossible to quickly and accurately build the geometric model of the double volute

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