By Ki-Han Kim, Georges Chahine, Jean-Pierre Franc, Ayat Karimi
This publication presents a entire therapy of the cavitation erosion phenomenon and cutting-edge examine within the box. it truly is divided into components. half 1 involves seven chapters, delivering quite a lot of computational and experimental techniques to cavitation erosion. It contains a common creation to cavitation and cavitation erosion an in depth description of amenities and dimension strategies wide-spread in cavitation erosion reviews, an intensive presentation of varied levels of cavitation harm (including incubation and mass loss) and insights into the contribution of computational the way to the research of either fluid and fabric habit. The proposed process relies on an in depth description of influence so much generated by means of collapsing cavitation bubbles and a actual research of the cloth reaction to those a lot. half 2 is dedicated to a variety of 9 papers awarded on the foreign Workshop on complicated Experimental and Numerical options for Cavitation Erosion Prediction (Grenoble, France, 1-2 March 2011) representing the vanguard of analysis on cavitation erosion. leading edge numerical and experimental investigations illustrate the main complicated breakthroughs in cavitation erosion learn.
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Extra info for Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction
Brennen CE (1995) Cavitation and bubble dynamics. Oxford engineering sciences series 44. Oxford University Press, New York 6. Hsiao C-T, Chahine GL (2004) Prediction of vortex cavitation inception using coupled spherical and non-spherical models and navier-stokes computations. J Mar Sci Technol 8(3):99–108 7. Hsiao C-T, Chahine GL (2005) Scaling of tip vortex cavitation inception noise with a bubble dynamics model accounting for nuclei size distribution. J Fluids Eng 127(1):55–65 8. MacIntyre F (1986) On reconciling optical and acoustical bubble spectra in the mixed layer.
L. Chahine et al. Because of the gradient of strain distribution beneath the impacts, a wide variety of deformation substructures were observed as a function of distance from the eroded surface. The TEM micrographs in Fig. 10 are only a few examples to illustrate microscopic mechanisms involved in cavitation damage. More detailed analysis of deformation processes under cavitation erosion can be found in [24, 36]. 5 Summary In this chapter, a brief introduction of cavitation and cavitation erosion was presented.
Cavitation erosion occurs in various stages, starting from an initial incubation period where the material surface undergoes plastic deformation, progressively moving towards material failure and progressive weight loss due to repeated cavitation impact loads. These stages are described in detail in the subsequent chapters. Cavitation loads induce high strain rate in material deformation. Consideration of the strain rate effects not only allows a better understanding of the erosion behavior of different materials, but also helps to elaborate more accurate predictive models for long-term erosion.