A new model to predict the head degradation of centrifugal pumps handling highly viscous flows

Ofuchi, Edgar M.; Cubas, Jhoan; Stel, Henrique; Dunaiski, Rafael; Vieira, T.S.; Morales, Rigoberto E. M.

doi:10.1016/j.petrol.2019.106737

Cited by 14 publications

(18 citation statements)

References 11 publications

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“…The correction factors were calculated between the baseline and the measured curves and were compared at three normalized specific speeds with the results of Gülich [15]. The baseline performance curve was modified by the Ofuchi correction procedure [16] to get the predicted degradation of the curves for glycerol solution. Finally, the performance curves from the experiments were compared with the predicted ones.…”

Section: Methodsmentioning

confidence: 99%

“…To predict the head degradation of the pump in the case of highly viscous or non-Newtonian fluid, the describing parameters had to be normalized [16]. The method required the values at the best efficiency point (referred to with the subscripts of "BEP") for water taken from the pump baseline curve at the nominal rotational speed.…”

Section: Prediction Methodsmentioning

confidence: 99%

“…𝜔 𝑛 = 𝜔 𝑠 𝜔 𝑠−𝐵𝐸𝑃 (4) Correction factors of the head (𝐶 𝐻 ) and volume flow rate (𝐶 𝑄 ) were proposed to use in estimations of the pump performance curve for highly viscous fluids. Ofuchi's new method [16] suggested calculating the correction factors based on the normalized dimensionless numbers using the following equations for given normalized specific speeds:…”

Section: Prediction Methodsmentioning

confidence: 99%

“…Gülich [15] formulated the estimation for pumping high viscosity fluids. Based on the earlier works, Ofuchi et al [16] recently developed a procedure to calculate the degraded points under viscous operation. In their study, a comparison with other models (Hydraulic Institute [1] and KSB [2]) and the limitations of the method were presented as well.…”

Section: Introductionmentioning

confidence: 99%

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Prediction Of Head Degradation Of A Centrifugal Pump Handling Power-Law Fluid

Csizmadia¹,

Lukácsi²,

Till³

2021

Proceedings of the 2nd International Conference on Fluid Flow and Thermal Science (ICFFTS'21)

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Operation of centrifugal pumps with non-Newtonian fluids is usually estimated with the help of correction factors. The calculation of these factors is based on methods defined fundamentally for high viscosity Newtonian fluids. A prediction model for head degradation based on the dimensional groups of a centrifugal pump is known for viscous liquids. This model uses experimentally obtained parameters. In this paper, the model's parameters with glycerol solution were validated by comparing the performance curves estimated with the predicted and measured ones. In addition, a possible way of using the estimation model with power-law fluid was investigated. Based on our experimental results at nominal rotational speed, a form for calculating a virtual shear rate was determined, with the help of which the predicted correction factors and head degradation curves at other rotational speeds showed a good agreement with the measurements. The reported results can be considered as a first step in developing an estimation procedure for head degradation of centrifugal pump's operation with power-law fluids.

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Section: Methodsmentioning

confidence: 99%

Section: Prediction Methodsmentioning

confidence: 99%

Section: Prediction Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction Of Head Degradation Of A Centrifugal Pump Handling Power-Law Fluid

Csizmadia¹,

Lukácsi²,

Till³

2021

Proceedings of the 2nd International Conference on Fluid Flow and Thermal Science (ICFFTS'21)

View full text Add to dashboard Cite

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“…Thus, CFD analysis has also played a significant role in the oil and gas industry for viscosity analysis. Many scholars, such as Shojaeefard [101,102], Sirino [103], Stel [104,105], Zhu [77], Zhang [78], Basaran [106], Ofuchi 2017 [107][108][109][110], Valdes [79], have applied different types of CFD techniques to analyze both single-phase and two-phase flow performance of pumps handling viscous fluids. Using the SST k-ω turbulence model, Shojaeefard et al [101,102] have performed CFD simulations to examine the influence of viscous fluids on working capability of centrifugal pumps.…”

Section: Influence Of Viscosity On Two-phase Performancementioning

confidence: 99%

Research Progress and Prospects of Multi-Stage Centrifugal Pump Capability for Handling Gas–Liquid Multiphase Flow: Comparison and Empirical Model Validation

et al. 2021

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The working capability of multi-stage pumps, such as electrical submersible pumps (ESPs) handling multiphase flow, has always been a big challenge for petroleum industries. The major problem is associated with the agglomeration of gas bubbles inside ESP-impellers, causing pump performance degradation ranging from mild to severe deterioration (surging/gas pockets). Previous literature showed that the two-phase performance of ESPs is greatly affected by gas involvement, rotational speed, bubble size, and fluid viscosity. Thus, it is necessary to understand which parameter is actually accountable for performance degradation and different flow patterns in ESP, and how it can be controlled. The present study is mainly focused on (1) the main parameters that impede two-phase performance of different ESPs; (2) comparison of existing empirical models (established for two-phase performance prediction and surging initiation) with our single-stage centrifugal pump results to determine their validity and working-range; (3) gas-handling techniques applied to enhance the multiphase performance of ESPs. Firstly, it aims at understanding the internal flow mechanism in different ESP designs, followed by test studies based on empirical models, visualization techniques, bubble-size measurements, and viscosity analysis. The CFD-based (computational fluid dynamics) numerical analysis concerning multiphase flow is described as well. Furthermore, gas-handling design methods are discussed that are helpful in developing the petroleum industry by enhancing the multiphase performance of ESPs.

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