Influence of the Geometric Parameters of the Impeller of a Free-Vortex Pump on the Energy and Cavitation Characteristics of the Pump

Svoboda, D. G.; Жарковский, А. А.; Ivanov, Evgeniy

doi:10.1007/s10556-019-00532-w

Cited by 10 publications

(5 citation statements)

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“…Effect of speed on the erosion rate on blade and hub [13,14]. As revolutions per minute at which impeller rotates increase, the force with which slurry strikes the impeller increases, which in turn increases the erosion rate.…”

Section: Resultsmentioning

confidence: 99%

Erosion processes during non-stationary cavitation of irrigation pumps

Dzhurabekov¹,

Rustamov²,

Nasyrova

et al. 2021

E3S Web Conf.

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The article gives the main results of the study of the dynamics of wear of the working bodies of irrigation pumps, gives the main recommendations as a result of the study of pumping units in the presence of cavitation. The authors consider the cavitation coefficient as the minimum value of this expression, at which the beginning of cavitation is detected. The process of unsteady cavitation is accompanied by many significant effects in which the water flow becomes two-phase, with a corresponding change in its properties, which affects the pump's efficiency. The effect of particle size on the erosion rate is predominant only up to a certain size limit, i.e., 600-800 microns on the blades. After that, the erosion rate increases with a comparatively slower rate. This indicates that the particle size affects the erosion rate only up to a certain particle size.

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Section: Resultsmentioning

confidence: 99%

Erosion processes during non-stationary cavitation of irrigation pumps

Dzhurabekov¹,

Rustamov²,

Nasyrova

et al. 2021

E3S Web Conf.

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“…Their characteristic feature is intense hardening under micro-shock action and the formation of deformation martensite. Observations carried out under the conditions of waterjet deterioration show that alloyed steels are more resistant to suspended sediment than carbon steels [16][17][18][19][20][21][22][23][24]. In this respect, they are preferred, as is the choice of material for parts subject to waterjet erosion.…”

Section: Sh=idem;mentioning

confidence: 99%

Influence of cavitation on pressure pulsation through impeller of large pumps

et al. 2021

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The article provides the main recommendations for studying the processes of cavitation development on the models of pumping units OPV-10-260 and V 20-13/45 with an impeller diameter Dr = 250 mm. The nature of the effect of cavitation depends on forms of pressure pulsation. The purpose of this work is to study abrasive-cavitation erosion of large pumps. The research objectives are to develop a methodology for calculating their operating modes, taking into account the minimum deterioration of working parts. Strongly developed cavitation leads to disruption of regular pulsations and an increase in the swing of the high-frequency component. Investigations of operating mode of pumps with deterioration of elements of flow section were carried out, and the characteristics of materials for the manufacture of hydromechanical equipment for resistance to cavitation deterioration were refined. According to experiments, the influence of pressure on the pressure fluctuation range begins to significantly affect if the pump pressure is less than 5 m. The nature of the effect of cavitation depends on the forms of pressure pulsation. The complexity of composition, high cost of high-alloy steels, and non-ferrous alloys make it irrational to use them in massive parts operating under cavitation-abrasive conditions. It is recommended to use the developed dependencies on machine water elevating systems to reduce deterioration by improving the quality of impeller materials.

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“…by means of fine tuning based on preset regularities of variation geometrical parameters. Such approach reflects modern trends in pump engineering [4][5][6], this experience should be applied for designing of hydroturbines and reverse hydraulic machines.…”

Section: B Algorithmmentioning

confidence: 99%

Optimization of Microturbines for Combined Energy Sources Based on Microhydropower Plants

Волков¹,

Vikhlyantsev²,

Druzhinin³

et al. 2019

IJITEE

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This work discusses design issues of microturbines for combined energy sources based on microhydropower plants for the heads H≤20 m and the flow rates Q ≤1.20 m3/s. It is proposed to optimize microturbines. The main approaches to the formulated problem are described, optimization algorithm is analyzed exemplifying its embodiments for separate elements of microhydroturbines. The proposed approach has been verified. Experimental results of microhydroturbine optimization for simulated combined energy source based on microhydropower plant with the available head H =1.1 m, flow rates Q ≤0.021 m3/s and rotation frequency of electric generator n = 1000 rpm have been presented. On the basis of numeric simulation, the hydraulic efficiency of hydroturbine has been increased by 5.4% as a consequence of the proposed approaches.

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Influence of the Geometric Parameters of the Impeller of a Free-Vortex Pump on the Energy and Cavitation Characteristics of the Pump

Cited by 10 publications

References 0 publications

Erosion processes during non-stationary cavitation of irrigation pumps

Erosion processes during non-stationary cavitation of irrigation pumps

Influence of cavitation on pressure pulsation through impeller of large pumps

Optimization of Microturbines for Combined Energy Sources Based on Microhydropower Plants

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