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Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction pp 303–327Cite as

Prediction of Cavitation Erosion and Residual Stress of Material Using Cavitating Flow Simulation with Bubble Flow Model

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Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 106))

Abstract

We have developed a numerical simulation code that can predict the cavitation erosion and the residual stress of a material, which are both closely related to plastic deformation. The shock wave generated at the cavitation bubble collapse hits the material surface and the impact energy causes plastic deformation which changes the residual stress. When the impact energy is high, mass loss (i.e., erosion) occurs after the plastic deformation stage. We numerically simulated impulsive bubble pressures that varied on the order of a microsecond in the cavitating flow with the ‘bubble flow model’. The bubble flow model simulates the abrupt time-variations in the radius and inner pressure of bubbles based on the Rayleigh-Plesset equation. Although the shock wave propagation was not simulated, the impact energy was estimated based on the bubble pressure. The predicted impact energy was compared with the distribution of plastic deformation pits, which were observed on the impeller blade surface of a centrifugal pump. The predicted impact energy was also compared with the distribution of residual stress measured on a stainless steel plate after a cavitating jet impinged on the plate. The distribution of the impact energy corresponded qualitatively to that of the residual stress improvement caused by the plastic deformation. High correlation between the predicted impact energy and the plastic deformation of material was confirmed, and we found that our numerical method is relevant for the prediction of cavitation erosion and residual stress on a material surface.

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Acknowledgments

I would particularly like to thank Prof. Y. Matsumoto (University of Tokyo) and Prof. Y. Tamura (Toyo University) for the discussion of my present study. Professors Matsumoto and Tamura developed the ‘bubble flow model’ and the cavitating flow simulation code which utilizes this model.

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Authors and Affiliations

  1. Hitachi, Ltd., Hitachi Research Laboratory, Mechanical Engineering Research Center, 832-2, Horiguchi, Hitachinaka, Ibaraki, 312-0034, Japan

    Masashi Fukaya

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  1. Masashi Fukaya
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Correspondence to Masashi Fukaya .

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Editors and Affiliations

  1. Office of Naval Research, Arlington, Virginia, USA

    Ki-Han Kim

  2. DYNAFLOW, Inc., Jessup, Maryland, USA

    Georges Chahine

  3. Laboratoire des Ecoulements Géophysiques et Industriels (LEGI), Grenoble, France

    Jean-Pierre Franc

  4. Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland

    Ayat Karimi

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Fukaya, M. (2014). Prediction of Cavitation Erosion and Residual Stress of Material Using Cavitating Flow Simulation with Bubble Flow Model. In: Kim, KH., Chahine, G., Franc, JP., Karimi, A. (eds) Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction. Fluid Mechanics and Its Applications, vol 106. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-8539-6_13

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  • DOI: https://doi.org/10.1007/978-94-017-8539-6_13

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-017-8538-9

  • Online ISBN: 978-94-017-8539-6

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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