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Open AccessArticle

Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump

1
State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
2
Science and Technology on Combustion, Internal Flow and Thermal-structure Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
3
Intelligent Manufacturing Research and Development Center, Xijing University, Xi’an 710123, China
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 388; https://doi.org/10.3390/w12020388
Received: 20 December 2019 / Revised: 21 January 2020 / Accepted: 23 January 2020 / Published: 1 February 2020
(This article belongs to the Section Hydraulics and Hydrodynamics)
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. View Full-Text
Keywords: pneumatic lifting pump; intake mode; riser diameter; experimental study pneumatic lifting pump; intake mode; riser diameter; experimental study
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MDPI and ACS Style

Zuo, J.; Li, F.; Zhang, N.; He, D.; Wang, W.; Zhang, J. Experimental Study on Hydraulic Characteristics of Pneumatic Lifting Pump. Water 2020, 12, 388.

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