Air-lift pumps characteristics under two-phase flow conditions
Air-lift pumps characteristics under two-phase flow conditions
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DOI：
10.1016/j.ijheatfluidflow.2008.09.002
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发表时间：
2009-02-01
影响因子：
2.6
通讯作者：
Ahmed, Wael H.
中科院分区：
文献类型：
--
作者：
Kassab, Sadek Z.;Kandil, Hamdy A.;Ahmed, Wael H.
在需要泵的可靠性和低维护的情况下，在必须处理核应用中的腐蚀性、磨蚀性或放射性流体的情况下，以及在压缩空气容易用作水泵送应用的可再生能源的情况下，气升泵的使用越来越多。本研究的目的是评估泵在预定操作条件下的性能，并优化相关参数。为此，设计并测试了气升泵。实验进行了九个淹没率，和三个不同的长度与不同的空气喷射压力的。此外，该泵在不同的两相流模式下进行了测试。在这项研究中提出了一个理论模型，考虑到在最佳效率范围内的泵操作的流动模式。结果表明，泵的排量和效率是空气质量流量、淹没比和立管长度的函数。气升泵运行的最佳效率范围被发现是在段塞流和段塞搅拌流制度。所提出的模型进行了比较，与实验数据和最引用的模型。所提出的模型与实验结果吻合良好，并发现预测不同的流动模式，包括泡状，弹状流和搅拌流模式的液体体积通量。(C)2008年爱思唯尔公司All rights reserved.
Air-lift pumps are finding increasing use where pump reliability and low maintenance are required, where corrosive, abrasive, or radioactive fluids in nuclear applications must be handled and when a compressed air is readily available as a source of a renewable energy for water pumping applications. The objective of the present study is to evaluate the performance of a pump under predetermined operating conditions and to optimize the related parameters. For this purpose, an air-lift pump was designed and tested. Experiments were performed for nine submergence ratios, and three risers of different lengths with different air injection pressures. Moreover, the pump was tested under different two-phase flow patterns. A theoretical model is proposed in this study taking into account the flow patterns at the best efficiency range where the pump is operated. The present results showed that the pump capacity and efficiency are functions of the air mass flow rate, submergence ratio, and riser pipe length. The best efficiency range of the air-lift pumps operation was found to be in the slug and slug-churn flow regimes. The proposed model has been compared with experimental data and the most cited models available. The proposed model is in good agreement with experimental results and found to predict the liquid volumetric flux for different flow patterns including bubbly, slug and churn flow patterns. (C) 2008 Elsevier Inc. All rights reserved.