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Nakamura, Yasuyuki; Sano, Kazuya; Morishita, Yoshitsugu; Maruyama, Shinichiro*; Tezuka, Shinichi*; Ogane, Daisuke*; Takashima, Yuji*
Journal of Engineering for Gas Turbines and Power, 133(6), p.064501_1 - 064501_3, 2011/06
Times Cited Count：1 Percentile：12.18(Engineering, Mechanical)Abrasive water jet (AWJ), is to shoot the abrasive mixed with high-pressure water to the material for cutting, can cut most materials like metals and concretes in water with long stand-off means the length from the cutting head to the material for cutting. On the other hand, AWJ is required to reduce an amount of the abrasive because it becomes the waste. It is also difficult to monitor the cutting condition by any visual methods like a TV camera in the water becoming cloudy by both used abrasive and cut metal grit. For solving these issues, some cutting tests were conducted and (1) It was possible to predict an optimal supply rate of abrasive by considering the conservation of momentum between the water jet and the abrasive. (2) It was also possible to judge whether the material could be cut successfully or not by detecting the change in the frequency characteristics of vibration or sound caused during the cutting process.
Nakamura, Yasuyuki; Iwai, Hiroki; Sano, Kazuya; Morishita, Yoshitsugu; Maruyama, Shinichiro*; Tezuka, Shinichi*; Ogane, Daisuke*; Takashima, Yuji*
Dekomisshoningu Giho, (38), p.43 - 52, 2008/11
The advanced thermal reactor (Fugen) at Fugen Decommissioning Engineering Center is characterized by its tube-cluster construction. As a part of the study of dismantling, we are considering the abrasive water jet (AWJ) technique that could be used for the dismantlement techniques of double-tubes (pressure tube and calandria tube) as one of possible methods. As a part of tests, we confirmed the possibility of abrasive recycle for cutting and the applicability of cutting monitoring technique for reducing the volume of secondary wastes and developing the cutting monitoring technique in the water.
Iwai, Hiroki; Nakamura, Yasuyuki; Sano, Kazuya; Maruyama, Shinichiro*; Ogane, Daisuke*; Takashima, Yuji*
no journal, ,
no abstracts in English
Takashima, Yuji*
no journal, ,
no abstracts in English
Maruyama, Shinichiro*; Abe, Yuta; Nakagiri, Toshio; Watatani, Satoshi*; Takashima, Yuji*
no journal, ,
no abstracts in English
