Efficiency of Jet Pumps

Winoto, S. H.; Li, H.; Shah, D. A.

doi:10.1061/(asce)0733-9429(2000)126:2(150)

Cited by 64 publications

(48 citation statements)

References 7 publications

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“…According to their results, the thickness has only a little effect on the pressure ratio and efficiency of the pump, whereas its effect on the flow field is relatively great. In the study by Winoto et al (2000), the pressure ratio and efficiency of water jet pumps were analyzed theoretically and experimentally as a function of the velocity ratio and the results obtained were compared. The authors tested a jet pump using three different driving nozzles (circular, square and triangular) in the pump with a constant area-mixing chamber.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Effects of Scale and Surface Roughness on Efficiency of Water Jet Pumps Using CFD

Aldaş

Yapıcı

2014

Engineering Applications of Computational Fluid Mechanics

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ABSTRACT:Comparing to pumps with moving parts water-jet pumps have a lower efficiency and surface roughness is an important factor for these types of pumps. The aim of this simulation study is to numerically determine how the scaling-up, downscaling and change in the absolute and relative roughness would impact on the energy efficiency of the pumps, using a commercial computational fluid dynamics (CFD) solver ANSYS FLUENT. In order to select the turbulence model that produces the predictions closest to the actual data from four turbulence models, a preliminary study was conducted on a full-scale jet pump. Using the transition SST model, which gives the best results among all the models, the effects of scale and roughness on the performance of the pumps were investigated in the scale range from 1/4 to 20/1. The optimum efficiencies for different area ratios over a wide range were determined according to the scale and size of roughness. It was seen that the efficiency increases significantly up to a given scale size at a constant absolute roughness, while it is generally independent of the scale size at constant relative roughness. The relative efficiency for the area ratio 5.92 reduces to 60% at the relative roughness value of 0.05. Moreover, CFD appears to be the most appropriate tool for model studies of jet pumps.

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Section: Introductionmentioning

confidence: 99%

Investigation of Effects of Scale and Surface Roughness on Efficiency of Water Jet Pumps Using CFD

Aldaş

Yapıcı

2014

Engineering Applications of Computational Fluid Mechanics

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“…[4]- [7] In terms of design, a Venturi water pump is a pumping device that uses an air compressor to supply pressure to converging suction which can create vacuum. The pressure difference creates a vacuum at suction where placed in water then this device is called a "water vacuum pump."…”

Section: Imentioning

confidence: 99%

“…A decrease in pressure creates vacuum. The more speed the fluid has before it travels through the smaller section pipe, the faster it will have to go it once it enters, the pressure will drop, the greater the vacuum effect will be.[4]- [7] In terms of design, a Venturi water pump is a pumping device that uses an air compressor to supply pressure to converging suction which can create vacuum. The pressure difference creates a vacuum at suction where placed in water then this device is called a "water vacuum pump."…”

mentioning

confidence: 99%

Performance Analysis of a Venturi Water Pump With Different Parts Variation

Ganas¹

2017

IJRASET

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The aim of the study is to determine the effects of varying the size of a specific part of Venturi water pump to the discharge volume flow rate and discharge head. A simulated design was fabricated as reference for the part variations. Tests were conducted on an experimental set-up where compressed air is supplied to a submerged Venturi water pump with a modified part. Discharge volume flow rates and heads were then measured and compared to the reference design test results. The obtained results demonstrated that when the chest diameter is increased the discharge volume flow rate also increased but the discharge head decreased. The effects were opposite when increasing both the pitot tube and throat lengths as the discharge flow rate decreased while the head increased. However, the results were fluctuating when changing the converging angle. Results presented in this paper can be of real use in the design and fabrication of Venturi water pumps for different applications. Further study should be made on variations of the converging angle to compare its discharge effect. Keywords: Venturi water pump, chest diameter, pitot tube length, converging angle, throat length. I.INTRODUCTION Venturi water pump has been widely used in the production and daily life due to its simple structure, reliable, and low-cost way to produce vacuum and considered an alternative to mechanical vacuum pumps.[1],[2] The efficiency of Venturi water pump is usually lower than that of conventional pumps but these accessories have some advantages over conventional pumps [3]. This water pump is based on the Venturi principle. The Venturi effect is the result of Bernoulli's principle of fluid dynamics, that is when the fluid is passing through the pipe and the pipe suddenly gets smaller, the fluid has to speed up to for the fluid behind it to keep moving at the same speed. It takes energy to accelerate, and the energy for the increased in speed comes from the force of pressure on the fluid. Since the energy is being used, the pressure has to decrease as the fluid accelerates. A decrease in pressure creates vacuum. The more speed the fluid has before it travels through the smaller section pipe, the faster it will have to go it once it enters, the pressure will drop, the greater the vacuum effect will be.[4]- [7] In terms of design, a Venturi water pump is a pumping device that uses an air compressor to supply pressure to converging suction which can create vacuum. The pressure difference creates a vacuum at suction where placed in water then this device is called a "water vacuum pump." Basic vacuum pump components are shown in Figure 1.[8], [9] In this paper, the researchers made different variations of those components considering that it can have an effect on the discharge performance of the device. A reference design was made so that for every component that was modified, all other parts were held fixed. This way the researchers were able to determine the relation of each altered component to the discharge condition namely: volume flo...

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“…One is to optimize the parameters through the structure improvement of the jet pump. Winoto [9] obtained by theoretical design and experiment that jet pump had the highest efficiency when the ratio of the area of nozzle to that of the throat was 0.3.…”

Section: A Research Status Of Design Theorymentioning

confidence: 99%

Research on Status and Development of Jet Pump

An¹,

Liang²

2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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Abstracts-Jet pump is a mechanism of vaccum pump working with medium of liquid or gas for the transportation of fluids such as solid, liquid and gas in the fields of water conservancy, power, petroleum, metallurgy, transportation, chemical industry, environmental protection and fire protection. In this paper, the basic structure and working principle of jet pump were discussed firstly, and then the research status of jet pump was presented from points of design theory, fluid inner flowing and practical application of jet pump. Based on the deep analysis of the development trend of jet pump in future, this article has certain reference value for future research.

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Efficiency of Jet Pumps

Cited by 64 publications

References 7 publications

Investigation of Effects of Scale and Surface Roughness on Efficiency of Water Jet Pumps Using CFD

Investigation of Effects of Scale and Surface Roughness on Efficiency of Water Jet Pumps Using CFD

Performance Analysis of a Venturi Water Pump With Different Parts Variation

Research on Status and Development of Jet Pump

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