Share This Article:

High Speed Observation of Periodic Cavity Behavior in a Convergent-Divergent Nozzle for Cavitating Water Jet

Abstract Full-Text HTML XML Download Download as PDF (Size:1837KB) PP. 102-107
DOI: 10.4236/jfcmv.2013.13013    6,379 Downloads   11,002 Views   Citations

ABSTRACT

Cloud cavitation shows an unsteady periodic tendency under a certain flow condition. In a cavitating water jet flow with cavitation clouds, the cavities or the clouds produce high impact at their collapse. In order to make clear a mechanism of the periodic cavity behavior, we experimentally examine the behavior in a transparent cylindrical convergent-divergent nozzle using a high-speed video camera. An effect of upstream pressure fluctuation due to a plunger pump is investigated from a
viewpoint of unsteady behavior in a cavitating water jet. As a result, it is found that the cavitating flow has two kinds of oscillation patterns in the cavity length (cavitation cloud region).
One is due to the upstream pressure fluctuation caused by the plunger pump. The other is much shorter periodic motion related to the characteristic oscillation of cavitation clouds accompanied with the shrinking (reentrant), growing and shedding motion of the clouds.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

K. Sato, Y. Taguchi and S. Hayashi, "High Speed Observation of Periodic Cavity Behavior in a Convergent-Divergent Nozzle for Cavitating Water Jet," Journal of Flow Control, Measurement & Visualization, Vol. 1 No. 3, 2013, pp. 102-107. doi: 10.4236/jfcmv.2013.13013.

References

[1] R. A. Furness and S. P. Hutton, “Experimental and Theoretical Studies of Two-Dimensional Fixed-Type Cavities,” Journal of Fluids Engineering, Vol. 97, No. 4, 1975, pp. 515-521. http://dx.doi.org/10.1115/1.3448098
[2] K. Sato, Y. Saito and H. Nakamura, “Self-Exciting Behavior of Cloud-like Cavitation and Micro-Vortex Cavities on the Shear Layer,” Proceedings of the 1st Symposium on Advanced Fluid Information, Sendai, 4-5 October 2001, pp. 263-268.
[3] K. Sato, Y. Wada, Y. Noto and Y. Sugimoto, “Reentrant Motion in Cloud Cavitation Due to Cloud Collapse and Pressure Wave Propagation,” Proceedings of ASME 2010 3rd Joint US-European Fluids Summer Meeting, Montreal, Quebec, 1-5 August 2010, pp. 7-11.
[4] M. Sakoda, R. Yakushiji, M. Maeda and H. Yamaguchi, “Mechanism of Cloud Cavitation Generation on a 2-D Hydrofoil,” Proceedings of the 4th International Symposium on Cavitation, Pasadena, 20-23 June 2001, pp. 1-8.
[5] M. Delar, I. Khlifa, S. Fuzier, M. Adama Maiga and O. Coutier-Delgosha, “Scale Effect on Unsteady Cloud Cavitation,” Experiments in Fluids, Vol. 53, No. 5, 2012, pp. 1233-1250. http://dx.doi.org/10.1007/s00348-012-1356-7
[6] J. P. Franc and J. M. Michel, “Fundamentals of Cavitation,” Kluwer Academic Publishers, Kluwer, 2004.
[7] A. Yamaguchi and S. Shimizu, “Erosion Due to Impingement of Cavitating Jet,” Journal of Fluids Engineering, Vol. 109, No. 4, 1987, pp. 442-447. http://dx.doi.org/10.1115/1.3242686
[8] M. M. Vijay, C. Zou and S. Tavoularis, “A Study of the Characteristics of Cavitating Water Jets by Photography and Erosion,” Proceedings of the 10th International Symposium on Jet Cutting Technology, Amsterdam, 31 October-2 November 1990, pp. 37-67.
[9] H. Soyama, Y. Yamauchi, Y. Adachi, T. Shindo, R. Oba and K. Sato, “High-Speed Cavitation-Cloud Observations around High-Speed Submerged Water Jets,” Proceedings of the 2nd International Symposium on Cavitation, Tokyo, 5-7 April 1994, pp. 225-230. http://dx.doi.org/10.1115/1.2813125
[10] E. A. F. Hutli and M. S. Nedeljkovic, “Frequency in Shedding/Discharging Cavitation Clouds Determined by Visualization of a Submerged Cavitating Jet,” Journal of Fluids Engineering, Vol. 130, No. 2, 2008, pp. 1-8. http://dx.doi.org/10.1115/1.2813125
[11] K. Sato, Y. Sugimoto and S. Ohjimi, “Pressure-wave Formation and Collapse of Cavitation Clouds Impinging on Solid Wall in a Submerged Water Jet,” Proceedings of the 7th International Symposium on Cavitation, Ann Arbor, 16-20 August 2009, pp. 1-11.
[12] K. Sato, Y. Sugimoto and S. Ohjimi, “Structure of Periodic Cavitation Clouds in Submerged Impinging Water-Jet Issued from Horn-Type Nozzle,” Proceedings of the 9th Pacific Rim International Conference on Water Jetting Technology, Koriyama, 20-23 November 2009, pp. 1-9.
[13] S. Nishimura, O. Takakuwa and H. Soyama, “Similarity Law on Shedding Frequency of Cavitation Cloud Induced by a Cavitating Jet,” Journal of Fluid Science and Technology, Vol. 7, No. 3, 2012, pp. 405-420. http://dx.doi.org/10.1299/jfst.7.405
[14] Y. Saito and K. Sato, “Bubble Collapse Propagation and Pressure Wave at Periodic Cloud Cavitation,” Proceedings of the 6th International Conference on Multiphase Flow, Leipzig, 9-13 July 2007, pp. 1-8.
[15] T. Yoshida, H. Iida, A. Yoshida and K. Yamamoto, “High Speed Observation of Unsteady Behavior of Bubble Clouds Split from Cavitating Jet,” Proceedngs of the 21st International Conference on Water Jetting, Ottawa, 19-22 September 2012, pp. 307-317.
[16] M. Kjeldsen, R. E. A. Arndt and M. Effertz, “Spectral Characteristics of Sheet/Cloud Cavitation,” Journal of Fluids Engineering, Vol. 122, No. 3, 2000, pp. 481-487.
[17] K. Sato, S. Shimojo and J. Watanabe, “Observations of Chain-Reaction Behavior at Bubble Collapse Using Ultra High Speed Video Camera,” Proceedings of the ASME/ JSME 2003 4th Joint Fluids Summer Engineering Conference, Honolulu, 6-10 July 2003, pp. 1347-1352. http://dx.doi.org/10.1115/FEDSM2003-45002

  
comments powered by Disqus

Copyright © 2019 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.