By Ki-Han Kim, Georges Chahine, Jean-Pierre Franc, Ayat Karimi
This ebook offers a entire therapy of the cavitation erosion phenomenon and state of the art learn within the box. it truly is divided into components. half 1 involves seven chapters, supplying a variety of computational and experimental methods to cavitation erosion. It features a basic advent to cavitation and cavitation erosion an in depth description of amenities and dimension thoughts familiar in cavitation erosion reports, an in depth presentation of assorted levels of cavitation harm (including incubation and mass loss) and insights into the contribution of computational how to the research of either fluid and fabric habit. The proposed strategy is predicated on an in depth description of impression rather a lot generated through collapsing cavitation bubbles and a actual research of the cloth reaction to those quite a bit. half 2 is dedicated to a range of 9 papers provided on the foreign Workshop on complicated Experimental and Numerical options for Cavitation Erosion Prediction (Grenoble, France, 1-2 March 2011) representing the vanguard of study on cavitation erosion. leading edge numerical and experimental investigations illustrate the main complicated breakthroughs in cavitation erosion examine.
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Additional info for Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction
G. Titanium). Deviations from the ASTM G32 method have to be documented. The cavitation erosion tests presented in Chap. 7 mm instead of 16 mm recommended by the ASTM for both the direct and alternative methods. The alternative G32 method is especially useful for testing 24 G. L. Chahine et al. Horn 20 kHz 50 µm Dummy button 500 µm Test sample Direct Method Alternative Method Fig. 2 Sketches of the test setups for the ultrasonic cavitation ASTM G32 direct method (left) and the alternative method (right).
5. e. only one loop is used at a time by shutting down the other loop using valves. The first flow loop that circulates water through the left side of the setup consists of a cavitating jet nozzle (CAVIJETÒ), a sample holder, an atmospheric test chamber, a water reservoir, and a pump. A sample holder is used to ensure that the sample can be taken out for measurements and then placed back precisely at the same location to continue testing. 2 Laboratory Testing Methods of Cavitation Erosion Fig. 4 mm orifice diameter), a sample holder, a pressurized test cell, a water reservoir, and a pump.
6). This is the case for the G134 test cell setup shown in Fig. 5. Different types of jets can be tested for their effect on cavitation erosion. In a conventional submerged jet (see Fig. 7 left), cavitation is generated in the turbulent shear layer between the high speed jet and the surrounding liquid. This results in a random distribution of elongated cavitation bubbles with some tendency to organize . This tendency can be harnessed and passive acoustic enhancement can be achieved by proper design of the nozzle shape and piping assembly to result in much more erosive structured cavitating jet (see Fig.