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Optimal design method of centrifugal pump impeller

A centrifugal pump impeller, optimized design technology, applied in the components, pump, calculation and other directions of the pumping device for elastic fluid, to achieve the effect of optimization accuracy, good operating efficiency and operating stability, and high efficiency

Active Publication Date: 2019-12-27
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

On July 20, 2011, the invention patent with the Chinese patent application number 201110202524.5 disclosed "an optimization design method for an anti-cavitation centrifugal pump impeller". By constructing optimization parameters and using NSGA-II genetic algorithm as an optimization tool, a An impeller optimization design method to improve cavitation and cavitation performance, which does not take into account factors that affect the stability of the impeller operation

Method used

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  • Optimal design method of centrifugal pump impeller
  • Optimal design method of centrifugal pump impeller
  • Optimal design method of centrifugal pump impeller

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Embodiment Construction

[0056] Further description will be given below in conjunction with the embodiments shown in the accompanying drawings.

[0057] Such as figure 1 The optimal design method of the centrifugal pump impeller shown in the following steps:

[0058] 1) First, according to the design requirements and design experience, a set of parameters to be optimized is specifically determined: impeller inlet width b 1 , impeller outlet width b 2 , blade inlet angle β 1 , blade outlet angle β 2 , blade number z( figure 2 with image 3 The angle and the width of the entrance and exit are marked), this set of parameters to be optimized and the constraint range are given below. Other impeller parameters are used as design constants;

[0059] Among them, the design parameters that need to be optimized for the centrifugal pump impeller have the following constraints:

[0060]

[0061] 30°1 <40°

[0062] 15°2 <40°

[0063]

[0064] In the above formula:

[0065] K m1 -Impeller inlet a...

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Abstract

The invention relates to the field of hydraulic optimization of a centrifugal pump, and discloses an optimal design method of a centrifugal pump impeller. According to the optimal design method, the optimal working point of the centrifugal pump impeller can be determined more accurately and quickly under the common constraints of vortex structure and entropy production, corresponding impeller design parameters are obtained, so that hydraulic performance and stability of the impeller are better. According to the technical scheme, the optimal design method of the centrifugal pump impeller is characterized in that the optimal design method of the centrifugal pump impeller comprises the following steps that(1) a set of parameters that need to be optimized are specifically determined accordingto the design requirements and based on design experience; (2) modeling and mesh generation are conducted; (3) CFX simulation verification is conducted; (4) vortex core structure is extracted; (5) entropy production is analyzed; (6) efficient point matching is conducted; and (7) design parameters of the impeller are optimized by using simulated annealing optimization algorithm.

Description

technical field [0001] The invention relates to the field of centrifugal pump hydraulic optimization, in particular to an optimal design method of a centrifugal pump impeller. Background technique [0002] At present, the centrifugal pump is the most widely used pump type in the pump industry, and its usage accounts for about 70% of the entire pump industry. The viscous effect of the fluid in the centrifugal pump and the special geometric structure of the centrifugal pump determine that the actual flow inside the centrifugal pump is three-dimensional, viscous, and unsteady. Various unstable flows are formed, mainly including: off-flow, backflow, secondary flow, wake flow, and various eddy currents, etc. These unsteady factors co-exist and play a significant role, making the flow field inside the centrifugal pump present Strong, complex unsteady flow characteristics. At the design point, although the centrifugal pump maintains a high operating efficiency, the existence of u...

Claims

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Application Information

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IPC IPC(8): F04D29/22G06F17/50
CPCF04D29/2244
Inventor 李晓俊刘遥遥郇钰莹蔡云辉陈波
Owner ZHEJIANG SCI-TECH UNIV
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