An advanced microbubble generator and its application to a newly developed bubble-jet-type air-lift pump

被引：11
作者：
Sadatomi, Michio [1 ]
Kawahara, Akimaro [1 ]
Matsuyama, Fuminori [1 ]
Kimura, Takanao [2 ]
机构：
[1] Dept. of Mechanical System Engineering, Kumamoto University, Kumamoto
[2] Air-Conditioning and Refrigeration Systems Works, Mitsubishi Electric Corporation, Wakayama
来源：
Multiphase Science and Technology | 2007年 / 19卷 / 04期
关键词：
Bubbles (in fluids);
D O I：
10.1615/MultScienTechn.v19.i4.20
中图分类号：
学科分类号：
摘要：
An advanced microbubble generator with a spherical body in a flowing water tube was patented by Sadatomi in 2003. The generator can suck air by a vacuum pressure behind the spherical body and has three advantages over existing generators: (i) its fabrication is easy because of a simple structure; (ii) it can produce any sizes of bubbles by controlling the flow rates of air and water introduced; and (iii) it requires less electric power. In the present paper, a simple model has been presented to predict its performance, i.e., the bubble generation rate ( air suction rate) and the water pressure at the generator inlet, when water is supplied at different rates to the generator at different water depths. From the validation test of the model against the present experimental data, it has been clarified that the model can predict reasonably well. As an industrial application of the generator, a bubble-jet-type air-lift pump with the generator at the riser bottom is presented together with the results of its feasibility test. In the field test, the air-lift pump could lift up water with fine sediments from the seabed in Amakusa Islands, leading to the purification of seawater there.
引用
收藏
页码：323 / 342
页数：19
相关论文
共 70 条
  • [11] Minagawa H., Yamada S., Hayashi I., Ikeda S., Yamamoto T., Shakutsui H., Study on Micro Bubble Generation Mechanism by Sudden Enlargement of Flow Area (in Japanese), Proc. of Annual Meeting of the Japanese Society for Multiphase Flow 2001, pp. 127-128, (2001)
  • [12] Moriguchi Y., Kato H., Influence of Microbubble Diameter and Bubble Distribution on Frictional Resistance Reduction by Microbubbles, J. Marine Sci. Technol, 7, 2, pp. 79-85, (2002)
  • [13] Ohnari H., Waste Water Purification in Wide Water Area by Use of Micro-Bubble Techniques (in Japanese), Japanese J. Multiphase Flow, 11, 3, pp. 263-266, (1997)
  • [14] Ohnari H., Fisheries Experiments of Cultivated Shells using Micro-Bubbles Technique (in Japanese), J. Heat Transfer Soc. Jpn, 40, 160, pp. 2-7, (2001)
  • [15] Sadatomi M., (2003)
  • [16] Sadatomi M., (2005)
  • [17] Sadatomi M., Kawahara K., Kano K., Ohtomo A., Performance of a New Micro-Bubble Generator with a Spherical Body in a Flowing Water Tube, Exp. Thermal Fluid Sci, 29, pp. 615-623, (2005)
  • [18] Sadatomi M., Kawahara K., Kimura T., Nakao J., Development and Study of Performance of Bubble-Jet-Type Air Lift Pump -2nd Report Effects of Parameters on Pump Performance, (2006)
  • [19] Sadatomi M., Ogata K., Katsura M., (2006)
  • [20] Serizawa A., Yahiro T., Micro-Bubble Nozzles and Their Operation (in Japanese), Proc. of Annual Meeting of the Japanese Society for Multiphase Flow 2001, pp. 139-140, (2001)
1234567