Development of Bubble Behavior Monitoring System around the Ship Body by Means of Ultrasonic Pulsed Doppler Method

2017 Fiscal Year Final Research Report

• Project/Area Number: 16H06805
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Naval and maritime engineering
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: Ihara Tomonori 東京海洋大学, 学術研究院, 助教 (70767350)
• Research Collaborator: TAKAMASA Tomoji ; HAZUKU Tatsuya ; ODE Tsuyoshi ; TAKEDA Yasushi ; KIKURA Hiroshige ; POVOLNY Antonin
• Project Period (FY): 2016-08-26 – 2018-03-31
• Keywords: 超音波パルスドップラー法 / UVP法 / 気液二相流

Outline of Final Research Achievements

Development of bubble behavior monitoring system around the ship body was investigated utilizing ultrasonic pulsed Doppler method. Research has been carried out into several steps. Broadband ultrasonic transducer was firstly investigated. Special mechanism was proposed to realize higher utility for the sensor positioning. Real time measurement system was then proposed employing the state of the art digital signal processing techniques. The signal processing method itself was also investigated. Besides the traditional Euler approach, Lagrange approach was proposed to track bubble behavior in both spatial and temporal means. Finally, those techniques are successfully merged together to demonstrate the applicability of the developed measurement system.

Free Research Field

実験流体力学