Performance evaluation of a regenerative pump under fluid viscosity enhancement

Nejadrajabali, Jafar; Riasi, Alireza; Nourbakhsh, S. Ahmad

doi:10.5755/j01.mech.23.6.16204

Cited by 3 publications

(9 citation statements)

References 14 publications

(19 reference statements)

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“…Figure 6 shows the geometry of the regenerative pump. Since Regenerative flow pumps confirm affinity laws (Shao and Zhao, 2017), the performance curves are presented using dimensionless flow coefficient (f ), head coefficient (c ), and efficiency (h ) (Nejadrajabali et al, 2016;Nejadrajabali et al, 2017). Pump characteristic flow, head and efficiency coefficients can be expressed as follow: The comparison of performance curves resulted from presented model and CFD simulations for the regenerative pump with bucket form blades is shown in Figures 7 and 8.…”

Section: Resultsmentioning

confidence: 99%

Calculation of flow in incompressible regenerative turbo-machines with bucket form blades based on the geometry of flow path

Nejadali

2019

HFF

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Purpose Regenerative flow pumps are dynamic machines with the ability to develop high heads at low flow rates. Simplicity, compactness, stable features and low manufacturing costs make them interesting for many applications in industries. The purpose of this study is to present a new method for calculating the flow through regenerative pumps with bucket form blades to predict the performance curves by a cheap and easy-to-use way. Design/methodology/approach The analysis was carried out based on the geometric shape of a fluid particle trajectory in a regenerative turbomachine. The fluid particle path was assumed to be a helix wrapped into a torus. Loss models were considered and the results of predictions were compared with computational fluid dynamics (CFD) data. Findings The overall trend of performance curves resulted from presented model looked consistent with CFD data. However, there were slight differences in high and low flow coefficients. The results showed that the predicted geometric shape of the flow path with the presented model (a helix wrapped into a torus) was not consistent with CFD results at high flow coefficients. Due to the complexity and turbulence of the fluid flow and errors in the calculation of losses, as well as slip factor, there was a discrepancy between the results of the presented model and numerical simulation, especially in high and low flow coefficients. Originality/value The analysis was carried out based on the geometric shape of a fluid particle trajectory in a regenerative turbomachine with bucket form blades. The fluid particle path was assumed to be a helix wrapped into a torus.

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Section: Resultsmentioning

confidence: 99%

Calculation of flow in incompressible regenerative turbo-machines with bucket form blades based on the geometry of flow path

Nejadali

2019

HFF

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“…Quail et al, 8 Shimosaka and Yamazaki, 16 Jeon et al, 18 Quail et al, 25 Quail et al, 27 Quail et al, 28 Quail et al, 30 Annadurai et al, 39 Nejadrajabali et al, 40 Nejad et al, 6 Nejad et al, 48 Nejadrajabali et al 49…”

Section: -100mentioning

confidence: 99%

“…Sixsmith and Altmann, 46 Song et al, 23 Jang and Jeon, 35 Song et al, 47 Natural gas 81/105 ¼ 0.77 Song et al 47 Air 120/280 ¼ 0.43 Badami and Mura 26 Hydrogen 41/138 ¼ 0.297 Badami and Mura 29,31 Hydrogen 36/145 ¼ 0.25 Jang and Jeon 35 Air 54/256 ¼ 0.21 Meakhail and Park 24 Water 20/170 ¼ 0.11 Quail et al 8,25,27,28,30 Water 30/74.5 ¼ 0.4 Choi et al 19 Water 45/170 ¼ 0.26 Annadurai et al 39 Water 36/65 ¼ 0.55 Nejadrajabali et al 40,49 Water 36/65 ¼ 0.55 Zhang et al 41,42,45 Water 24/150 ¼ 0.16 Nejad et al 6,48 Water 36/65 ¼ 0.55 Jeon et al 18 Water 48/72.6 ¼ 0.66 Pei et al 44 Water 24/150 ¼ 0.16…”

Section: -300mentioning

confidence: 99%

“…The study revealed that larger stripper angle has a significant influence on the pressure developed and very low influence of efficiency. In a unique experiment conducted by Nejadrajabali et al., 49 the performance of a regenerative flow pump is studied at different fluid viscosities obtained by mixing Polyacrylamide in water. It found that the performance becomes poorer as the viscosity increases.…”

Section: Experimental Studiesmentioning

confidence: 99%

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Regenerative flow pumps, blowers and compressors – A review

Sreekanth

Sivakumar

Kumar

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper presents a detailed and objective review of regenerative flow turbomachines, namely pumps, blowers and compressors. Several aspects of turbomachines like design and operating parameters, working principle, flow behaviour, performance parameters and analytical and Computational Fluid Dynamics (CFD) related details have been reviewed and summarized. Experimental work has been put in perspective and the most useful results for optimized performance have been presented. Consolidated plots of specific speed-specific diameter have been plotted which can be helpful in the early stages of design. Industrial outlook involving details of suppliers from various parts of the world, their product description and applications too are included. Finally, future research work to be carried out to make these machines widespread is suggested. This review is targeted at designer engineers who would need quantitative data to work with.

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“…Nejad et al [24] conducted experiments and found out the best vane angle (10 • ) for a pump. Studies have also been conducted to study the influence of fluid viscosity on the performance of a pump [25]. They altered the viscosity of water by mixing polyacrylamide in it.…”

Section: Introductionmentioning

confidence: 99%

Regression-Analysis-Based Empirical Correlations to Design Regenerative Flow Machines

et al. 2022

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Regenerative flow machines are known to be simple in construction but complex in flow characteristics. Due to this reason, the design of these machines has been primarily esoteric, and hence its performance heavily relies on the experience and expertise of the designer. Since there are no established rules of thumb for designing them, this paper attempts to provide simple design correlations for systematically designing regenerative flow machines viz. pumps, blowers, and compressors. Three different impeller designs have been considered, namely the (i) single-side vane impeller, (ii) double-side vane impeller, and (iii) peripheral vane impeller, for the three types of machines. More than ten design parameters have been considered for sizing the machines. Experimental and computational data available in open literature have been used to obtain physically meaningful correlations in simple form, and require minimal and practically available inputs. Fluid properties and practical constraints were taken into consideration while deriving the correlations. Constants in the correlations were obtained using least square regression analysis. The accuracy of the obtained correlation is determined by the correlation coefficient. The deviation obtained using the derived correlations varied from 10 to 25%. A consolidated set of correlations has been presented, which will be helpful in making a preliminary design before CFD simulation, design optimization, and prototype building. Finally, the obtained correlations have been used to demonstrate the design of a regenerative flow pump.

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Performance evaluation of a regenerative pump under fluid viscosity enhancement

Cited by 3 publications

References 14 publications

Calculation of flow in incompressible regenerative turbo-machines with bucket form blades based on the geometry of flow path

Calculation of flow in incompressible regenerative turbo-machines with bucket form blades based on the geometry of flow path

Regenerative flow pumps, blowers and compressors – A review

Regression-Analysis-Based Empirical Correlations to Design Regenerative Flow Machines

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