{"title":"Analysis of Impact Load Induced by Ultrasonic Cavitation Bubble Collapse Using Thin Film Pressure Sensors ","authors":"Moiz S. Vohra, Nagalingam Arun Prasanth, Wei L. Tan, S. H. Yeo","volume":131,"journal":"International Journal of Mechanical and Industrial Engineering","pagesStart":1815,"pagesEnd":1821,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10008222","abstract":"
The understanding of generation and collapse of acoustic cavitation bubbles are prerequisites for application of cavitation erosion. Microbubbles generated due to rapid fluctuation of pressure induced by propagation of ultrasonic wave lead to formation of high velocity microjets and or shock waves upon collapse. Due to vast application of ultrasonic, it is important to characterize and understand cavitation collapse pressure under the radiating surface at different conditions. A comparative investigation is carried out to determine impact load and dynamic pressure distribution exerted upon bubble collapse using thin film pressure sensors. Measurements were recorded at different input conditions such as amplitude, stand-off distance, insertion depth of the horn inside the liquid and pulse on-off time of acoustic vibrations. Impact force of 2.97 N is recorded at amplitude of 108 μm and stand-off distance of 1 mm from the sensor film, whereas impulsive force as low as 0.4 N is recorded at amplitude of 12 μm and stand-off distance of 5 mm from the sensor film. The results drawn from the investigation indicated that variety of impact loads can be achieved by controlling generation and collapse of bubbles, making it suitable to use for numerous application.<\/p>\r\n","references":"[1]\tSamir C.R, Jean-Perre Franc, Marc Fivel, \u2018Cavitation erosion: Using target material as a pressure sensor\u2019, J. of Applied Physics 118, 164905 (2015).\r\n[2]\tPeter R.B, Douglas G.O, Christopher J.J, \u2018Multiple observations of cavitation cluster dynamics close to an ultrasonic horn tip\u2019, J. Acoust. Soc. Am. 130 (Nov 2011) Pg. 3379-3388.\r\n[3]\tX. Ma, B. Huang, G. Wang, M. Zhang, \u2018Experimental investigation of conical bubble structure and acoustic flow structure in ultrasonic field\u2019, Ultrasonics Sonochemistry 34 (2017) 164-172.\r\n[4]\tLeen V.W, \u2018Mechanics of collapsing cavitation bubbles\u2019, Ultrasonics Sonochemistry 29 (2016) 524-527.\r\n[5]\tL. Bai, W. Xu, J. Deng, C. Li, D. Xu, Y. Gao, \u2018Generation and control of acoustic cavitation structure\u2019, Ultrasonics Sonochemistry 21 (2014) 1696-1706.\r\n[6]\tChristian Vanhille, \u2018A two-dimensional nonlinear model for the generation of stable cavitation bubbles\u2019, Ultrasonics Sonochemistry 31 (2016) 631-636.\r\n[7]\tC. Vanhill, C. Campos-Pozuelo, C. Granger, B. Dubus, \u2018A numerical study of the formation of a conical cavitation bubble structure at low ultrasonic frequency\u2019, Physics Procedia 70 (2015) 1070-1073.\r\n[8]\tB. K. Sreedhar, S.K. Albert, A.B. Pandit, \u2018Cavitation damage: Theory and measurement \u2013 Review\u2019, Wear 372-373 (2017) 177-196.\r\n[9]\tT. Okada, Y. Iwai, S. Hattori, N. Tanimura, Relation between impact load and damage produced by cavitation bubble collapse\u2019, Wear 184 (1995) 231-239.\r\n[10]\tT. Momma, A. Lichtarowicz, \u2018A study of pressure erosion produced by collapsing cavitation\u2019, Wear 186-187 (1995) 425-436.\r\n[11]\tS. Singh, J. Choi, G. Chahine, \u2018Characterization of cavitation fields from measured pressure signals of cavitating jets and ultrasonic horns\u2019, J. Fluids Eng., Trans. ASME, vol. 135 (Sept 2013) 091302-1 to 091302-11.\r\n[12]\tJ. Choi, G. Chahine, \u2018Relationship between material pitting and cavitation field impulsive pressures\u2019, Wear 352-353 (2016) 42-53.\r\n[13]\tK. S. Jansson, M.P. Michalski, S. D. Smith, R.F. LaPrade, C.A. Wijdicks, \u2018Tekscan pressure sensor output changes in the presence of liquid exposure\u2019, J. of Biomechanics 46 (2013) 612-614. ","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 131, 2017"}