Establishment of the generation method of air-coated abrasive suspension jet under submerged condition

• Project/Area Number: 26420124
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Nihon University
• Principal Investigator: PENG Guoyi 日本大学, 工学部, 教授 (90295527)
• Co-Investigator(Kenkyū-buntansha): 清水 誠二 日本大学, 工学部, 教授 (80154293)
• Research Collaborator: TRYGGVASON Greater ; OGUMA Yasuyuki ; NISHIKATA Hironori ; ISHIZAKI Kenji ; OKADA Kunihiro ; ITO Takayuki ; WAKUI Ayaka
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: ウォータージェット / 混相流 / キャビテーション / 気泡流 / 可視化計測 / 数値解析 / 数値シミュレーション

Outline of Final Research Achievements

The cutting method of underwater structures is essential to dismantle a nuclear plant decided on decommissioning such as Fukushima Daiichi Nuclear Power Station. However, when the Abrasive Suspension Jet (ASJ, hereafter) technology is applied the processing capability quickly declines with increase of standoff distance. In order to enhance the performance of ASJ, the method to generate air-coated ASJ by using sheathed nozzle with ventilation is established in this work, and the effects of sheath dimension and ventilation air flow rate are examined through flow analysis and material cutting tests.

Research Products

• [Journal Article] Periodic Behavior of Cavitation Cloud Shedding in Submerged Water Jets Issuing from a Sheathed Pipe Nozzle (2018)
  • Author(s): Peng Guoyi、Wakui Ayaka、Oguma Yasuyuki、Shimizu Seiji、Ji Hong
  • Journal Title: Journal of Flow Control, Measurement and Visualization Volume: 06 Issue: 01 Pages: 15-26
  • DOI: 10.4236/jfcmv.2018.61002
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Numerical analysis of cavitation cloud shedding in a submerged water (2016)
  • Author(s): G. Peng, C. Yang, Y. Oguma, S. Shimizu
  • Journal Title: Journal of Hydrodynamics Volume: 6 Issue: 6 Pages: 986-993
  • DOI: 10.1016/s1001-6058(16)60700-x
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Numerical Simulation of Unsteady Cavitation in a High-speed Water Jet (2016)
  • Author(s): G. Peng, K. Okada, C. Yang, Y. Oguma and Seiji Shimizu
  • Journal Title: International Journal of Fluid Machinery and Systems Volume: 9 Issue: 1 Pages: 66-74
  • DOI: 10.5293/IJFMS.2016.9.1.066
  • NAID: 130005128712
  • ISSN: 1882-9554
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Submerged cutting characteristics of abrasive suspension jet (2015)
  • Author(s): 清水誠二, 西方博紀, 彭國義, 小熊靖之
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 81 Issue: 831 Pages: 15-00361-15-00361
  • DOI: 10.1299/transjsme.15-00361
  • NAID: 130005111477
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Two-dimensional direct numerical simulation of bubble cloud cavitation by front-tracking method (2015)
  • Author(s): G. Peng, G. Tryggvason and S. Shimizu
  • Journal Title: IOP Conf. Seri.: Materials Science and Engineering Volume: 72 Issue: 1 Pages: 1-7
  • DOI: 10.1088/1757-899x/72/1/012001
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] PIVを用いたキャビテーション・ウォーター・ジェットの速度場計測 (2017)
  • Author(s): 伊藤隆之，彭 國義，小熊靖之，清水誠二
  • Organizer: 2016年度ウォータージェット技術年次報告会
• [Presentation] Unsteady behavior of cavitating water jet issuing from a submerged orifice nozzle (2016)
  • Author(s): G. Peng, Y. Oguma, Seiji Shimizu
  • Organizer: 11th Pacific Rim International Conference on Water Jet Technology (PRIC-WJT 2016)
  • Place of Presentation: Xuzhou, China
  • Year and Date: 2016-10-16
  • Int'l Joint Research
• [Presentation] Evolution of abrasive suspension jets (2016)
  • Author(s): Seiji Shimizu, G. Peng, Y. Oguma
  • Organizer: 11th Pacific Rim International Conference on Water Jet Technology (PRIC-WJT 2016)
  • Place of Presentation: Xuzhou, China
  • Year and Date: 2016-10-16
  • Int'l Joint Research
• [Presentation] 鞘付きノズルにおける非定常キャビテーション気泡流の数値シミュレーション (2016)
  • Author(s): 彭國義，小熊靖，清水誠二
  • Organizer: 2015年度ウォータージェット技術年次報告会
  • Place of Presentation: 鹿島建設技術研究所
  • Year and Date: 2016-02-26
• [Presentation] アブレシブサスペンションジェット水中切断 (2015)
  • Author(s): 西方博紀，彭國義，小熊靖之，清水誠二
  • Organizer: 日本機械学会2015年度年次大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2015-09-13
• [Presentation] Numerical simulation of unsteady cavitation in a high-speed water jet (2015)
  • Author(s): G. Peng, K. Okada, C. Yang, Y. Oguma, and S. Shimizu
  • Organizer: the 13th Asian International Conference on Fluid Machinery
  • Place of Presentation: Waseda University
  • Year and Date: 2015-09-07
  • Int'l Joint Research
• [Presentation] Visualization observation of cavitation cloud shedding in a submerged water jet (2015)
  • Author(s): G. Peng, Y. Oguma, S. Shimizu
  • Organizer: 3rd Symposium on Fluid-Structure-Sound Interactions and Control
  • Place of Presentation: Purth, Australia
  • Year and Date: 2015-07-05
  • Int'l Joint Research
• [Presentation] 相変換を伴うウォータージェット流れの数値解析手法とその応用 (2015)
  • Author(s): 彭國義，清水誠二
  • Organizer: 2014年度ウォータージェット技術年次報告会論文集
  • Place of Presentation: 金沢
  • Year and Date: 2015-01-23 – 2015-01-24
• [Presentation] 鞘付きオリフィスノズルを用いたウォータージェット流れの可視化観察 (2015)
  • Author(s): 石﨑賢至，彭國義，小熊靖之，清水誠二
  • Organizer: 2014年度ウォータージェット技術年次報告会論文集
  • Place of Presentation: 金沢
  • Year and Date: 2015-01-23 – 2015-01-24
• [Presentation] アブレシブサスペンションジェットの原子炉解体への応用 (2014)
  • Author(s): 清水誠二，彭國義，小熊靖之
  • Organizer: キャビテーションに関するシンポジウム(第17回)
  • Place of Presentation: 東京
  • Year and Date: 2014-11-20 – 2014-11-21
• [Presentation] アブレシブサスペンションジェットによる水中切断 (2014)
  • Author(s): 西方博紀，彭國義，小熊靖之，清水誠二
  • Organizer: 日本機械学会流体工学部門講演会 USB講演論文集
  • Place of Presentation: 富山
  • Year and Date: 2014-10-25 – 2014-10-26