The technique and the algorithm of the determination of the main design parameters of the low mass centrifugal pump

Borovin, G K; Petrov, Aleksey Igorevich; Protopopov, A.

doi:10.20948/prepr-2016-63

Cited by 2 publications

(2 citation statements)

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Section: Introductionmentioning

confidence: 99%

“…Many theoretical and experimental works devoted to the improvement of CPOI have been published [4][5][6][7]. The methodology and algorithm for determining the main design parameters of a low-flow centrifugal pump with semi-open impellers is presented in [4]. Leaks of the working fluid in the axial clearance of the pump and hydraulic losses at the inlet to the impeller were taken into account in this method.…”

Section: Introductionmentioning

confidence: 99%

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Calculation algorithm for non-stationary pumping of liquid foodstuffs by a centrifugal pump with an open impeller

Akhmedova

Levicheva²,

Наумов

2022

J. Phys.: Conf. Ser.

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The mathematical model of pumping liquid foodstuffs by a centrifugal pump with an open impeller was proposed in this article. The liquid levels difference in the initial and final tank changes during pumping. Therefore, the pumping process is non-stationary with a slowly changing fluid flow rate. The mathematical model includes two differential equations: the balance of the pumped liquid and the dynamics of the fluid flow in the pipeline. The operating characteristics of the centrifugal pump were approximated by second-order polynomials according to the test data of the manufacturers of this equipment. The need to take into account the influence of fluid viscosity on the pump performance is shown in the article. The pump pressure is noticeably reduced, and the power consumed increases for concentrated apple juice compared to pumping water. The system of differential equations with corresponding boundary conditions was solved numerically. The flow rate very quickly reaches a value corresponding to the difference in levels at the beginning of pumping. Therefore, the problem can be solved in a quasi-stationary approximation. The change in fluid flow over time is close to linear. Therefore, it is possible to find the pumping time of a given volume by an approximate method. The approximate calculation algorithm has been proposed. It was used to calculate the pumping of a concentrated apple juice. The effect of changes in the diameter and length of the pipeline on the performance and energy efficiency of the pumping unit has been investigated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Calculation algorithm for non-stationary pumping of liquid foodstuffs by a centrifugal pump with an open impeller

Akhmedova

Levicheva²,

Наумов

2022

J. Phys.: Conf. Ser.

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Analytical and experimental assessment of screw centrifugal pump at improving its design

Nazarenko¹

2021

Nauk. visn. nat. hirn. univ.

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Purpose. Development of analytical and experimental assessment of screw centrifugal type pump at a design stage, which permits defining more precisely its power and cavitation characteristics. Methodology. To achieve the above-mentioned purpose, the technique that includes the following possibilities was developed: make the list of changes which increase the efficiency of the existing pump; quickly and with high precision to estimate influence of certain constructive and/or regime changes on efficiency of the existing pump without difficult flow calculations; determine the need to develop a new pump, if all the changes of the existing pump did not give a positive result; determine changes influence on cavitation properties of the existing pump; calculate the efficiency dispersion during hydraulic tests of the modified pump. Findings. During the research, an analytical and experimental technique which permits determining increase in the pump efficiency quickly and with high precision at the change in pump design and/or operating mode was developed. The developed technique determines how all changes in the existing pump influence its anti-cavitation properties. The above mentioned technique also allows calculating the efficiency dispersion during hydraulic tests of the modified pump. The technique determines the need to develop a new pump, if all the changes in the existing pump did not give a positive result. The use of the presented calculation technique, at a design stage, allows estimating the efficiency of the developed pump more precisely. The developed technique allows increasing the efficiency assessment accuracy and cavitation characteristics of low-flow high-speed screw centrifugal pump. Originality. During the research, new empirical dependences were obtained that permit defining more precisely power and cavitation characteristics of low-flow high-speed screw centrifugal pump. Practical value. The presented technique at a design stage allows estimating the developed pump efficiency more precisely. Due to this, it is possible to reduce the time for pump development and its development tests.

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The technique and the algorithm of the determination of the main design parameters of the low mass centrifugal pump

Cited by 2 publications

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Calculation algorithm for non-stationary pumping of liquid foodstuffs by a centrifugal pump with an open impeller

Calculation algorithm for non-stationary pumping of liquid foodstuffs by a centrifugal pump with an open impeller

Analytical and experimental assessment of screw centrifugal pump at improving its design

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