Evaluation of near-wall solution approaches for large-eddy simulations of flow in a centrifugal pump impeller

Yao, Zhifeng; Yang, Zhen; Wang, Fujun

doi:10.1080/19942060.2016.1189362

Cited by 15 publications

(14 citation statements)

References 38 publications

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“…This trend is a result of significant developments in computer capacities, in parallel with the development of numerical solution methods in recent years. Accordingly, the literature studies on the subject, which include numerical and experimental processes together: (i) The relationship of geometric components with the flow field throughout the pump (Pei et al, 2016;Zhou et al, 2018;Yuanyi et al 2009;Shi et al 2013;Tao et al 2017), (ii) Reliability of numerical simulations in pump design (Yao et al 2016;Maitelli et al 2010;Derakhshan and Nourbersi 2008) and (iii) Effect of fluid viscosity on pump performance . It can be classified under three titles.…”

Section: Introductionmentioning

confidence: 99%

“…They performed the simulations taking into account two different diffusers and selected the pressure conversion parameter as the evaluation parameter. Yao et al (2016) examined the effect of wall function on the results in numerical simulations that do not define the complex flow structure occurring along the pump impellerdiffuser. In their research, they selected RANS (Reynolds Averaged Navier Stokes), LES (Large Eddy Simulation) and RANS / LES hybrid turbulence models.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of some impeller geometric parameters of an industrial electric submersible pump

Firatoglu

Alihanoglu

2020

Preprint

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Submersible pumps, which are the main means of bringing the ground liquid to the surface, are widely used in agricultural irrigation, petroleum industry, geothermal fields, and similar applications. In most applications, submersible pumps are the main energy inputs of the operating process. Therefore, a small improvement in submersible pump efficiency will significantly reduce the operating cost of the system. The motivation and focus of this study are to experimentally and numerically investigate the effect of the geometric parameters of the submersible pump on the efficiency of the pump. The submersible pump has a design in the form of the serial connection of the stages including the impeller and the diffuser and enters the multi-stage pump category. All the impeller connected to a single shaft rotates at the same angular velocity. Despite the rotation of the impeller at a constant angular speed along with the pump, the flow structure at each stage shows large variations compared to other stages. These differences lead to the formation of a complex flow structure and thus to great difficulties in the experimental identification of the flow field along with the pump. Another difficulty in the experimental definition is that the measured values can show dramatic changes depending on many parameters such as fluid viscosity-temperature, impeller inlet-outlet angle, diffuser inlet-outlet angle, number of blades, the distance between stages, surface roughness. The current general trend is to solve the above-mentioned problems with numerical simulations verified by experimental data. This trend is a result of significant developments in computer capacities parallel to the development of numerical solution methods in recent years. This trend, or the method, has been followed throughout this study. Firstly, within the scope of this study, the performance in different stages of a selected industrial submersible pump was measured by the experimental. Following the measurements, the effects of two basic geometric parameters, such as impeller outlet width and impeller outlet angle on the pump performance were examined with CFD simulations verified by the experimental measurements. This small deviation indicates that the CFD simulation results are in perfect agreement with the experimental measurements. In the simulations performed, it is observed that the time-dependent variables have their size changed but the flow structure does not change. Another striking finding from the CFD simulations carried out is; it has been observed that while geometric arrangements have a partial effect on the flow structure along with the pump, they cause a difference in the critical values on the basic variables that define pump performance, such as pressure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of some impeller geometric parameters of an industrial electric submersible pump

Firatoglu

Alihanoglu

2020

Preprint

View full text Add to dashboard Cite

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“…Computational fluid dynamics simulations of centrifugal pumps were performed in Refs. [8,9] and [10,11] where FSI modeling has been used to study the impeller vibrations induced by nonsymmetrical hydrodynamic loads. The Design of Experiments study of a single blade impeller pump of Ref.…”

Section: Introductionmentioning

confidence: 99%

A Thin Film Fluid Structure Interaction Model for the Study of Flexible Structure Dynamics in Centrifugal Pumps

Albadawi

Specklin

Connolly

et al. 2018

Journal of Fluids Engineering

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This paper describes a fluid-structure interaction (FSI) model for the study of flexible cloth-like structures or the so-called rags in flows through centrifugal pumps. The structural model and its coupling to the flow solver are based on a Lagrangian formulation combining structural deformation and motion modeling coupled to a sharp interface immersed boundary model (IBM). The solution has been implemented in the open-source library OpenFOAM relying in particular on its PIMPLE segregated Navier–Stokes pressure–velocity coupling and its detached eddy simulation (DES) turbulence model. The FSI solver is assessed in terms of its capability to generate consistent deformations and transport of the immersed flexible structures. Two benchmark cases are covered and both involve experimental validation with three-dimensional (3D) structural deformations of the rag captured using a digital image correlation (DIC) technique. Simulations of a rag transported in a centrifugal pump confirm the suitability of the model to inform on the dynamic behavior of immersed structures under practical engineering conditions.

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“…The prediction comparison between k--R t and LES models demonstrates that the predicted results remained in a relatively unstable state, consequently the computation precision was impacted negatively (Yao, Yang, & Wang, 2016;Zanaganeh, Mousavi, & Etemad Shahidi, 2009). In some interferential conditions such as turbulence shock and radical waterjet impact, SpalartAllmaras and Reynolds stress models can provide a relatively stable information feedback or standard signal benchmark for turbulence monitoring.…”

Section: Orthogonal Experiments For the Verification Of Fuzzy Predictionmentioning

confidence: 99%

Fuzzy prediction of AWJ turbulence characteristics by using typical multi-phase flow models

Liang

Shan

Liu

et al. 2017

Engineering Applications of Computational Fluid Mechanics

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For the purpose of improving the working performance of AWJ (Abrasive waterjet) grinding in actual machining, and revealing the unknown influence mechanism of waterjet machining prediction, this research conducted a theoretical and experimental investigation concerning with the influences caused by multi-phase flow models, on the fuzzy prediction of turbulence characteristics. First, typical flow models describing the abrasive waterjet were presented and enunciated; Second, a series of turbulence characteristics were defined to quantitatively demonstrate the waterjet flow, which are responsible for the actual performances of AWJ grinding in the contact zone; Then a new fuzzy prediction system equipped with logic protocols was established and introduced to predict turbulence characteristics based upon the machining parameters by employing different flow models, therefore a set of quantified prediction results generated from the CFD (Computational Fluid Dynamics) simulation, orthogonal experiments and actual measurements can be obtained and distinguished systematically. Through a detailed performance analysis with benchmark indexes and prediction comparisons, the theoretical superiorities and specific applications of these flow models were fully discussed and then an integrated conclusion assessing their inherent influence mechanism was acquired. Based on these innovative achievements, the instantaneous machining inspection or parameter optimization in AWJ grinding process can be facilitated, simultaneously the new research ideas aimed at waterjet monitoring or grinding improvements can be presented as well. ARTICLE HISTORY

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Evaluation of near-wall solution approaches for large-eddy simulations of flow in a centrifugal pump impeller

Cited by 15 publications

References 38 publications

Experimental and numerical investigation of some impeller geometric parameters of an industrial electric submersible pump

Experimental and numerical investigation of some impeller geometric parameters of an industrial electric submersible pump

A Thin Film Fluid Structure Interaction Model for the Study of Flexible Structure Dynamics in Centrifugal Pumps

Fuzzy prediction of AWJ turbulence characteristics by using typical multi-phase flow models

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