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Computational fluid dynamics (CFD)-based centrifugal pump multi-working condition hydraulic power optimization method

A hydraulic optimization and centrifugal pump technology, which is applied in the direction of pumps, non-variable pumps, non-displacement pumps, etc., can solve problems such as hydraulic optimization methods for multi-working conditions of centrifugal pumps that have not been seen in CFD, and achieve the goal of suppressing cavitation Effect

Active Publication Date: 2011-01-26
JIANGSU UNIV
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Problems solved by technology

[0004] After searching, there have been no literatures or patent applications on CFD-based hydraulic optimization methods for centrifugal pumps under multiple working conditions. Only some scholars have done research work such as CFD numerical simulation under non-design working conditions of centrifugal pumps.

Method used

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  • Computational fluid dynamics (CFD)-based centrifugal pump multi-working condition hydraulic power optimization method
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  • Computational fluid dynamics (CFD)-based centrifugal pump multi-working condition hydraulic power optimization method

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Embodiment Construction

[0031] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0032] The flow of the CFD-based hydraulic optimization method for multi-working conditions of centrifugal pumps in this embodiment is as follows figure 1 shown, including the following steps:

[0033] (1) Based on the external characteristic experiment, the initial sample library for the multi-condition hydraulic optimization of the centrifugal pump is established.

[0034] Build a test bench for the external characteristics of centrifugal pumps; lift of centrifugal pumps H It is measured by the pressure gauges at the inlet and outlet of the centrifugal pump; the power of the centrifugal pump is measured by the electric method P ; Centrifugal pump flow Q It is read by the electromagnetic flowmeter on the outlet piping system of the centrifugal pump; the efficiency of the centrifugal pump n by the formula n = ρ g QH / P .

[0035] The key ...

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Abstract

The invention discloses a computational fluid dynamics (CFD)-based centrifugal pump multi-working condition hydraulic power optimization method. The method comprises the following steps of: 1, establishing an initial specimen bank for centrifugal pump multi-working condition hydraulic power optimization on the basis of external characteristic tests; 2, establishing a CFD-based centrifugal pump multi-working condition hydraulic power optimization model; 3, generating a specimen bank for the centrifugal pump multi-working condition hydraulic power optimization and constructing a response surface approximate model by CFD technology on the basis of single point hydraulic design and uniform design methods; 4, globally optimizing the approximate model by a global optimization algorithm; and 5, performing hydraulic power design on a centrifugal pump by a parametric computer aided design (PCAD) according to optimization results so as to obtain a multi-working condition hydraulic power model of the centrifugal pump. The method can perform the multi-working condition hydraulic power optimization on the centrifugal pump according to the performance requirements under multiple working conditions so as to improve the weighted average efficiency and enlarge the high efficiency area range, and can provide references for unstable flowing under the working conditions of actively controlling low flow and cavitation under the working conditions of inhibiting high flow.

Description

technical field [0001] The invention belongs to the field of centrifugal pump hydraulic optimization, in particular to a CFD-based hydraulic design method for multi-working conditions of centrifugal pumps, which is mainly used to guide hydraulic optimization and energy-saving transformation of centrifugal pumps, so as to improve the weighted average efficiency of centrifugal pumps and expand centrifugal pumps. Pump high-efficiency zone range. Background technique [0002] At present, the traditional centrifugal pump design method is a single working condition (design working condition) design method, which cannot take into account the performance of centrifugal pumps between multiple working conditions, and its performance under multiple working conditions is mainly through repeated "design-calculation (or experiment) - modify" implemented. In the design and development process, CFD technology is not fully utilized for auxiliary analysis and optimization of centrifugal pump...

Claims

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Application Information

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IPC IPC(8): F04D1/00
Inventor 刘厚林王凯袁寿其谈明高王勇
Owner JIANGSU UNIV
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