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http://dx.doi.org/10.3744/SNAK.2019.56.4.327

An Experimental Study on Artificial Supercavitation Generated by Different Combinations of the Cavitator and Body  

Jeong, So-Won (Korea Research Institute of Ships and Ocean Engineering, KRISO)
Park, Sang-Tae (Department of Naval Architecture and Ocean Engineering, Chungnam National University)
Ahn, Byoung-Kwon (Department of Naval Architecture and Ocean Engineering, Chungnam National University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.56, no.4, 2019 , pp. 327-334 More about this Journal
Abstract
Recently, there has been a growing interest in artificial supercavitation as a way to reduce friction drag of submerged vehicles. A cavitator plays an important role to generate the supercavity, so many studies have focused on the case of cavitator only. However, the body shape behind the cavitator affects the growth of the supercavity and this effect must be considered for evaluating the overall performance of the system. In this work, we conducted experimental investigation on artificial supercavitation generated by different combinations of the cavitator and body. We observed the supercavity pattern by using a high-speed camera and measured the pressure inside the cavity by using an absolute pressure transducer. We estimated the relation between the amount of injected air and the supercavity shape for different combinations. In summary, the disk type cavitator generates larger supercavity than that of the cone and ellipsoidal cavitators, but cavity development speed is relatively slower rather than the others. Furthermore, fore body angle plays an important role to generate the supercavity enveloping the entire body.
Keywords
Cavitation; Natural supercavitation; Artificial supercavitation; Underwater vehicle; Fore body;
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Times Cited By KSCI : 2  (Citation Analysis)
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