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Centrifugal pump design method based on matrix laboratory (MATLAB) genetic algorithm

A genetic algorithm and design method technology, applied in the field of centrifugal pump design based on MATLAB genetic algorithm, can solve problems such as not having the exact formula for pump loss, single-objective optimization of optimization goals, hindering engineering application promotion, etc., to overcome the global optimal solution. problems, reduce workload, and shorten the effect of design cycle

Inactive Publication Date: 2013-04-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the existing research results, on the one hand, there is no precise formula for pump loss in theory, and most of the optimization objectives are single-objective optimization, which has certain limitations.
On the other hand, the design parameters that can be provided to designers are also very limited, which hinders the engineering application of this method.

Method used

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  • Centrifugal pump design method based on matrix laboratory (MATLAB) genetic algorithm
  • Centrifugal pump design method based on matrix laboratory (MATLAB) genetic algorithm
  • Centrifugal pump design method based on matrix laboratory (MATLAB) genetic algorithm

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Embodiment

[0020] In this embodiment, the design of a single-stage IS-type clean water centrifugal pump is taken as an example. The design parameters are as follows: flow rate 198m3 / h, head 50m, pump speed 2900rpm; perform the following steps:

[0021] (1) Select centrifugal pump impeller inlet diameter D 0 , impeller outlet diameter D 2 , blade inlet position D′ 1 , blade inlet placement angle β 1 , blade outlet placement angle β 2 , blade inlet width b 1 , Blade outlet b 2 and the number of blades z as optimization variables to establish the sub-objective function g of the overall power loss of the centrifugal pump 1 (x), NPSH sub-objective function g 2 (x), centrifugal pump stability sub-objective function g 3 (x); Figure 1~2 Schematic diagram of the variables of the impeller.

[0022] (2) Take the minimum initial value of each sub-objective function, and assign weights ρ to each sub-objective function i , to establish a unified objective function g ...

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Abstract

The invention discloses a centrifugal pump design method based on matrix laboratory (MATLAB) genetic algorithm, and the method is characterized by comprising the following steps of firstly selecting the diameter of an inlet and an outlet of an impeller of a centrifugal pump, positions of an inlet and an outlet of blades, a placement angle of the inlet and the outlet of the blade, the width of the inlet and the outlet of the blade and the quantity of the blades as optimized variables, establishing a branch objective function of overall loss power of the centrifugal pump, a branch objective function of net positive suction head and a branch objective function of centrifugal pump stability; respectively acquiring a minimal initial value of each branch objective function, allocating a weight pho i for each branch objective function, and establishing a uniform objective function g(X); setting a restraint condition of the optimized variable according to a speed coefficient method result; and finally adopting an MATLAB genetic algorithm tool box to obtain a minimal value of the g(X) as well as the value of each variable. Compared with the prior art, the design period is shortened, the optimization process is simplified, and the stability also can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of centrifugal pumps, in particular to a design method of centrifugal pumps based on MATLAB genetic algorithm. Background technique [0002] At present, there are two main methods used in the optimal design of centrifugal pumps: the loss extreme value method and the screening method based on CFD analysis. The screening method based on CFD analysis has been basically put into practical use at present, predicting the performance of centrifugal pumps according to the designed flow channel and blade shape of the pump; through repeated modification of the model, until a satisfactory design scheme is screened out. However, this method has a large workload and a long cycle. The loss extremum method establishes the relationship between pump loss and design parameters, and selects the best combination from different combinations of pump geometric parameters to minimize the total loss of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 黄思宋志光
Owner SOUTH CHINA UNIV OF TECH
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