Investigation on Reverse Characteristics of Centrifugal Pump In Turbine Mode: A Comparative Study By An Experimentation And Simulation

Vasanthakumar, P.; Krishnaraj, J.; Karthikayan, S.; Vinoth, T.; Sankar, Shyam

doi:10.1016/j.matpr.2017.01.074

Cited by 8 publications

(7 citation statements)

References 20 publications

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“…Fast Fourier Transform (FFT) 17,18 is used to calculate the frequency domain diagram of pressure pulsation values in Figures 15 to 19. It can be seen from Figures 20 to 24 that when the flow rate is 10,000 L/h, the frequency domain value of point 1 of the two double volute models is smaller than that of SV.…”

Section: Unsteady Flow Analysismentioning

confidence: 99%

Influence of different types of volutes on centrifugal aviation fuel pump

Wang¹,

2021

Advances in Mechanical Engineering

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High efficiency and low vibration are two hot topics in the field of fluid mechanics. In this paper, different spiral volutes are designed for centrifugal aviation fuel pump based on Velocity Coefficient Method. Physical fields under different operating conditions are simulated by computational fluid dynamics (CFD) software that solved the Navier–Stokes equations for three-dimensional flow (3D-RANS). And theoretical and simulation values of radial and axial forces are analyzed. The unsteady pressure fluctuation based on the steady results at the monitoring point is solved and Fast Fourier Transform (FFT) is used to obtain the influence of different volutes on pressure pulsation. The influence of three volutes on is analyzed and compared with the simulation. The results show that the double volutes improve significantly the large flow efficiency of the aviation fuel pump, 20%–30% higher than that of the single volute. The doubles volute can also optimize the radial force under the off-design condition. The radial force of the single volute fuel pump is 100 N. The radial force of the two types of double volute fuel pump is between 10 and 20 N. The three types of volute have no obvious influence on the axial force. Two types of double volutes provide excellent suppression of fuel pump pulsation spikes over the full frequency range. The peak value of single volute is mainly concentrated in the low frequency area below 2000 Hz. The blade frequency (170 Hz) and frequency multiplication are the main frequencies of the pulsation and the pulsation decreases rapidly in the high frequency area. The research results provide theoretical support for the design of aviation fuel pump with low pressure pulsation.

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Section: Unsteady Flow Analysismentioning

confidence: 99%

Influence of different types of volutes on centrifugal aviation fuel pump

Wang¹,

2021

Advances in Mechanical Engineering

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“…Comparative research was conducted by Hossain et al [15], not forgetting [8,16] methods to come out with a knowledge edge that is better than the others. e method of [16][17][18] was discovered to offer a deeper understanding of PAT performance characteristics; they consist of the "area ratio," which was a theoretical method developed in [19][20][21]. A study was conducted to investigate material consumption and carbon emissions in selected towns and provinces in China.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Computational Flow Characterization Analyses of Centrifugal Pump Operating as Turbine

Chang

Adu

et al. 2021

Complexity

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Using a pump in reverse mode as a hydraulic turbine remains an alternative for hydropower generation in meeting energy needs, especially for the provision of electricity to remote and rural settlements. The primary challenge with small hydroelectric systems is attributed to the high price of smaller size hydraulic turbines. A specific commercial pump model, with a flow rate of 12.5 m3/h, head 32 m, pressure side diameter of 50 mm, impeller out, and inlet diameters of 160 mm and 6 mm, respectively, was chosen for this research. This research aimed to investigate a pump’s flow characteristics as a turbine to help select a suitable pump to be used as a turbine for micro- or small hydropower construction. Numerical methodologies have been adopted to contribute to the thoughtful knowledge of pressure and velocity distribution in the pump turbine performance. In this study, the unsteady flow relations amongst the rotating impeller and stationary volute of the centrifugal pump made up four blades and four splitters. Intermittent simulation results of pressure and velocity flow characteristics were studied considering diverse impeller suction angles. The study was conducted by considering a wide range of rotational speeds starting from 750 rpm to 3250 rpm. From the results, it was found that PAT operation was improved when operated at low speeds compared to high-speed operation. Thus, speeds between 1500 rpm and 2000 rpm were suitable for PAT performance. This research helps to realize the unsteady flow physiognomies, which provide information for future research on PAT. This study makes useful facts available which could be helpful for the pump turbine development. Future studies should focus on cost analysis and emission generation in energy generation.

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“…Por lo tanto, las consideraciones de flujo continuo utilizadas en CFD para resolver ecuaciones de Navier-Stokes et al (NS) son la forma más común de realizar simulaciones numéricas para maquinaria hidráulica [65], [67]. Sin embargo, la parte experimental es necesaria para calibrar modelos numéricos CFD y obtener resultados confiables en PATs bajo diferentes etapas de optimización [68]- [71] El estudio de PATs está relacionado directamente con los objetivos del desarrollo sostenible (ODS) [72] porque su correcta implantación deriva en el desarrollo de ciudades incluyentes, sostenibles, seguras y resilientes, debido a que son elementos destinados a recuperar energía limpia.…”

Section: Ubicaciónunclassified

“…The calculated relative error was 6.8% for efficiency. Finally, in new research [71], Yang et al investigated how the radial gap between impeller tips and volute tongue influences the performance and the pressure pulsations of PATs using numerical simulation similar to the previous two simulations. The results showed an optimal radial related to the BEP and that, if the radial gap increased, the high-frequency pressure pulsation would be reduced.…”

Section: Type Of Machinementioning

confidence: 99%

“…Therefore, the continuum considerations used in CFD to solve Navier-Stokes equations (NS) are the most common way to perform numerical simulation for hydraulic machinery [65], [67]. However, the experimental part is necessary to calibrate CFD numerical models and to obtain reliable results in PATs under different optimization stages [68]- [71].…”

Section: Introductionmentioning

confidence: 99%

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Metodología de análisis para la mejora de la predicción de las curvas características de bombas trabajando como turbina operando a velocidad variable

Plua Aguirre

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Introducción 22 1.1. Motivación 22 1.2. Estructura de la tesis 28 1.3. Objetivos 30 1.4. Herramientas y software empleado 31 2. Artículo 1. " Analysis of Applicability of CFD Numerical Studies Applied to Problem when Pump Working as Turbine" 32 2.1. Description 32 XII 3. Artículo 2. "New Expressions to Apply the Variation Operation Strategy in Engineering Tools Using Pumps Working as Turbines" 3.1. Description 3.2. Introduction 3.3. Material and Methods 3.4. Results 3.5. Conclusions 4. Artículo 3. "Variable Speed Control in PATs: Theoretical, Experimental and Numerical Modelling" 4.1. Description 4.2. Introduction 4.3. Materials and Methods 4.4. Results 4.5. Conclusions

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Investigation on Reverse Characteristics of Centrifugal Pump In Turbine Mode: A Comparative Study By An Experimentation And Simulation

Cited by 8 publications

References 20 publications

Influence of different types of volutes on centrifugal aviation fuel pump

Influence of different types of volutes on centrifugal aviation fuel pump

Numerical Simulation and Computational Flow Characterization Analyses of Centrifugal Pump Operating as Turbine

Metodología de análisis para la mejora de la predicción de las curvas características de bombas trabajando como turbina operando a velocidad variable

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