Pressure behaviour in riser tube of a short airlift pump

Moisidis, Charalampos T.; Kastrinakis, E. G.

doi:10.1080/00221680903568642

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…This occurs because of higher bubble velocity, which implies a momentum change (Alasadi and Habeeb [38]). d. The greater the number of injector holes (N), the higher the discharged water volumetric flow rate (Q L ) , as reported by Parker [53,54] and Hu et al [24]. This is because the greater the number of injector holes, more small bubbles are formed, which have the potential to coalesce into a slug and increase the buoyancy to lift water.…”

Section: (D) Region (Ii))mentioning

confidence: 82%

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Hydrodynamic behaviors of air–water two-phase flow during the water lifting in a bubble generator type of airlift pump system

2021

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The effects of submergence ratio and gas flow rate on the performance and hydrodynamic behavior of air-liquid two-phase flow have been investigated during liquid lifting in the developed bubble-generator-type airlift pump system. Here, a mechanistic model was also developed to predict the performance of the bubble-generator-type airlift pump system on the basis of pressure balance with considering the intake angle of the injector, and the suction pipe length. A developed image processing technique was implemented to determine the hydrodynamic behaviors including gas slug velocity, water slug velocity, slug length, and gas hold up under the various submergence ratio and gas flow rate. The submergence ratio is the ratio between the static lift and the sum of static lift and static head. The experimental result was found that the minimum air flow rate for removing water is reduced by 19.17% when the airlift pump is combined with an orifice-type bubble generator. The decrease in submergence ratio causes the lower the efficiency at the critical point of airlift pump-bubble generator. Under the same submergence ratio, an increase in the supplied air superficial velocity increased the hydrodynamic parameter. A mechanistic model from pressure balance and dimensional analysis have a maximum error of 11.97% and 3.33%, respectively.

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Section: (D) Region (Ii))mentioning

confidence: 82%

“…This distance is sufficient to avoid the entrance effect and ensure a stable flow. It is the fully developed region, corresponding to [54]. They proposed that the pressure tends to stabilize at a distance of…”

Section: Experimental Methods and Proceduresmentioning

confidence: 99%

Hydrodynamic behaviors of air–water two-phase flow during the water lifting in a bubble generator type of airlift pump system

2021

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“…Moisidis and Kastrinakis [18] investigated the pressure behavior in riser tubes of a short airlift pump for various submergence ratios, air discharges and riser tube lengths. Their experimental data showed a nonlinear behavior of pressure near the exit of the air ejector due to the increased friction losses in this region.…”

Section: Introductionmentioning

confidence: 99%

Entropy analysis of buoyancy driven gas–liquid two-phase flow: Analytical and experimental approaches

Hanafizadeh

Eshraghi

Amini

2016

European Journal of Mechanics - B/Fluids

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“…Esen [7] and Keng [8] mainly studied the influence of basic parameters on pneumatic lifting performance. Hanafizadeh [9,10] and Charalampos [11,12] tested gas content and pressure distribution in a pipe and analyzed the stepped pipeline. Riglin [13] studied the effect of adding a helical component to a radial air incident device on pump performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump

Zuo

Zhang

et al. 2020

Water

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A pneumatic lifting pump is used in sewage treatment, offshore oil production, and other fields because of its simple structure and strong practicability. In order to study its internal hydraulic characteristics and gas-liquid two-phase flow, this paper carries out experimental research on the influence of different air intake modes and riser diameters on the performance of a pneumatic lifting pump. The air-water two-phase flow pattern in the riser and motion characteristics of bubble formation at the nozzle are obtained by a high-speed camera. Through theoretical analysis, the theoretical model of a pneumatic lifting pump is established, and experimental results verify the theoretical model well. The results show that when the submergence ratio is constant, the lifting efficiency decreases with the smaller intake area under different intake areas; and the influences of different holes distributions on liquid flow rate and lifting efficiency are not significant under the same intake area. At the same submergence ratio, the smaller the riser diameter, the smaller the final lifting liquid flow rate and the larger the lifting efficiency peak value.

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Pressure behaviour in riser tube of a short airlift pump

Cited by 12 publications

References 20 publications

Hydrodynamic behaviors of air–water two-phase flow during the water lifting in a bubble generator type of airlift pump system

Hydrodynamic behaviors of air–water two-phase flow during the water lifting in a bubble generator type of airlift pump system

Entropy analysis of buoyancy driven gas–liquid two-phase flow: Analytical and experimental approaches

Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump

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