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Measuring bubble size in aerated flow

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Abstract

The effect of reducing cavitation damage in high-speed flow structure not only relate with entrained air concentration, but also relate with air bubble density has been discovered in recent research. The air bubbles in aerated flow with diameter below then 0.2mm or 0.5mm plays important role in reducing cavitation damage. May be very little air concentration can protect construction free from cavitation erosion. Thereby, measuring bubble size must be emphasized in study of reducing cavitation damage. Measuring bubble size can use probe of needle-type and image usually. By analyses and application experience of velocimeter of air concentration probe of needle-type, suggesting of the median size of bubble d 50 adopt measuring data by probe directly, and calculate space distance and density of bubble. Although, the d 50 and space distance would be big then real size, and density small then real value. The measuring results have importance value for studying mechanism and establishing a new criterion on entrained air to reduce cavitation damage.

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References

  1. LI Wei-xing, hydraulics Prototype observation of LUBUGE hydraulic power flood discharge tunnel at left side bank. [C]. Discharge engineering and high speed flow memoir, 1994, 45-48. (in Chinese)

  2. CHEN Xian-pu, XI Ru-ze, SHAO Dong-Chao, and CHAI Gong-Shun, New Direction of Study on Entrain Air to Reduce Cavitation Damage. [J]. Water resources and hydropower engineering, 2001, 10: 13–16. (in Chinese)

    Google Scholar 

  3. CHEN Xian-pu, XI Ru-ze, SHAO Dong-Chao, and LIANG Bin, New concept of air entrainment effect on mitigating cavitation damage. [J]. journal of hydraulic engineering, 2003, 8:70–74.

    Google Scholar 

  4. LIANG Bin, CHEN Xian-pu, SHAO Dong-Chao, and CAI Hua, Air bubble gradation of high velocity aerated flow.[J]. Hydro-science and engineering, 2002.6, No.2, 66–68. (in Chinese)

    Google Scholar 

  5. ZHANG Fa-xing, XU Wei-I in, ZHU Ya-qin, and ZENG Hua, Effects of bubble size distribution on aeration for cavitation alleviation under cavitation shock wave. [J]. Water resources and hydropower engineering, 2005, 10: 5–7. (in Chinese)

    Google Scholar 

  6. LI Zhi-gao, CHEN Gang, HUANG Zhao-wei, and ZHANG Ming-liang. The effect of bubble diameter on entrainment concentration forecast result. [J]. journal of Northwest hydroelectric power, 2004, Vol. 20, 1: 4–6. (in Chinese)

    Google Scholar 

  7. CHEN Xian-pu, CAI Hua, XI Ru-ze, LIANG Bin, SHAO Dong-Chao, and CHAI Gong-Shun, A air concentration velocity meter with the probe of needle type. [C]. Hydraulics measurement technology memoir, Vol. 4: 37-42. (in Chinese)

  8. SHAO Dong-Chao, CHEN Xian-pu, XI Ru-ze, and CAI Hua, Experimental of aerated flow in flood discharge tunnel. [J]. Water resources and hydropower engineering, 2001, 10: 29–31. (in Chinese)

    Google Scholar 

  9. Liu Chao, and YANG Yong-quan, Study of mitigating cavitation erosion on turn over arc downstream sidewall in dragon look up free flow flood discharge tunnel. [J]. Water resources and hydropower engineering, 2003, 9: 26–28. (in Chinese)

    Google Scholar 

  10. CHEN Xian-pu, SHAO Dong-Chao, Yu Zhi-Liang, and LIANG Bin, Experimental Study of Flow behavior of Air Entrainment, [R]. Anhui & Huaihe River Water Resources Research Institute, 2006.2. (in Chinese)

  11. ZHANG Rong-sheng, ZHENG Yuan, and CHENG Yun-shah, Study of measuring micro-bubble diameter. [J]. Journal of Experiments in Fluid Mechanics, 2005.6, Vol.19, No.2, 91–95. (in Chinese)

    Google Scholar 

  12. GONG Wei-jin, CAI Jian-an, and LI Ling, The Use of Computer Image Processing Technology in Studying Characteristics of Air Bubbles in Air Floatation Process. [J]. Industrial water & wastewater, 2004.12, Vol. 35, No.6, 60–62. (in Chinese)

    Google Scholar 

  13. LIU Rong-li, DAI Guang, and CHEN Gang, Application of Digital Image Technique in Measurement of Bubble Void Fraction. [J]. Journal of SICHUAN university (engineering science edition), 2003.1, Vol.35, No.1, 24–26. (in Chinese)

    Google Scholar 

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Authors and Affiliations

  1. Anhui & Huaihe River Water Resources Research Institute, 233000, Bengbu, China

    Xian-Pu Chen & Dong-Chao Shao

Authors
  1. Xian-Pu Chen
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  2. Dong-Chao Shao
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Corresponding author

Correspondence to Xian-Pu Chen.

Additional information

Project supported by the National Natural Science Foundation of China (Grant No: 50279022).

Biography: CHEN Xian-pu (1939-), male, Professor.

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Chen, XP., Shao, DC. Measuring bubble size in aerated flow. J Hydrodyn 18 (Suppl 1), 459–463 (2006). https://doi.org/10.1007/BF03400489

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  • DOI: https://doi.org/10.1007/BF03400489

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