caa a22 4500 475737164 CHVBK 20180406123450.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1007/s007730070009 doi (NATIONALLICENCE)springer-10.1007/s007730070009 Frictional drag reduction with air lubricant over a super-water-repellent surface [Elektronische Daten] [Kazuhiro Fukuda, Junichiro Tokunaga, Takashi Nobunaga, Tatsuo Nakatani, Toru Iwasaki, Yoshikuni Kunitake] This paper presents a new technique for reducing frictional drag using a super-water-repellent surface and air-injection (called an SWR & A technique). Its effectiveness was examined by carrying out pressure-loss measurements with a tube of rectangular cross section, along with resistance tests on a horizontal flat plate, a 7.2-m-long tanker model, and a 12-m-long high length-to-beam-ratio model ship. These test results showed that the new technique can significantly reduce the models' frictional drag; for example, the frictional resistance on the SWR surface was reduced by 80% at a speed of 4 m/s and 55% at 8 m/s. The Society of Naval Architects of Japan, 2000 Key words Frictional drag reduction nationallicence Air lubricant nationallicence Super-water-repellent surface nationallicence Fluid frictional drag nationallicence Fukuda Kazuhiro Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut Tokunaga Junichiro Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut Nobunaga Takashi Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut Nakatani Tatsuo Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut Iwasaki Toru Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut Kunitake Yoshikuni Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut https://doi.org/10.1007/s007730070009 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s007730070009 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fukuda Kazuhiro Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut NATIONALLICENCE 700 1- Tokunaga Junichiro Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut NATIONALLICENCE 700 1- Nobunaga Takashi Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut NATIONALLICENCE 700 1- Nakatani Tatsuo Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut NATIONALLICENCE 700 1- Iwasaki Toru Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut NATIONALLICENCE 700 1- Kunitake Yoshikuni Research and Development Headquarters, Mitsui Engineering and Shipbuilding Co., Ltd., 5-6-4 Tsukiji, Chuo-ku, Tokyo 104-8439, Japan, JP aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer