Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Reduction of skin friction and two-phase flow structure beneath wall in horizontal rectangular channel

  Tatsuya Hazuku, Tomonori Ihara, Takashi Hibiki , 2022.03

  Ocean Engineering

  DOI

  OACIS Paper URL

• Wax Thickness and Distribution Monitoring Inside Petroleum Pipes Based on External Temperature Measurements

  S.Ito, Y.Tanaka, T.Hazuku, T.Ihara, M.Morita, I.Forsdyke , 2021.03

  ACS Omega

  DOI

  OACIS Paper URL

• Surface Wettability Enhancement on Oxide Film Coated-steels due to Gamma-ray Irradiation

  W.Susanto, T.Ihara, T.Hazuku, S.Morooka, S.Kano , 2020.06

  Mechanical Engineering Journal

  DOI

• Measurement of Local Two-phase Flow Parameters of Downward Bubbly Flow in Mini Pipes

  T.Hazuku, T.Ihara, T.Hibiki , 2020.06

  Experimental and Computational Multiphase Flow

  DOI

• Wettability Recovery Behavior Governed by Desorption of Hydroxyl Species in Steel

  S.Kano, H.Yang, J.McGrady, T.Ihara, T.Hazuku, H.Abe , 2019.05

  Langmuir 2019

  DOI

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Books 【 display / non-display 】

Books 【 display / non-display 】

• JSME Data Book: Flow Measurements

  本阿彌眞治，波津久達也，他112名 , 2022.04

  丸善出版（編集：日本機械学会） , 6・3・2節「液膜・界面」

• ボイラー用語辞典

  波津久達也 他 , 2006.08

  社団法人日本ボイラ協会 , 0-0

• 混相流計測法、日本原子力学会/編

  賞雅寛而、波津久達也 , 2003.02

  森北出版（株） , 第１部基本的物理量の計測　D 密度・ボイド率　18. 画像解析による気泡流の界面ミクロ測定（pp. 104-110）、第２部二相流微視的計測パラメータの計測　E 気泡／大きさ・速度　48. 画像解析による気泡径の測定（pp. 282-283）、第２部　F 液膜／厚さ　53. レーザーおよびビデオによる液膜流界面波の測定（pp. 308-313）、第２部　H 液膜／界面形状　59. レーザーフォーカス変位計及び画像処理による液膜流界面波速度の測定（pp. 341-345） , 0-0

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Development of pipeline monitoring technology for highly advanced flow assurance of offshore resources

  Project Period (FY)： 2023/04  -  2026/03  Investigator(s): 波津久達也

  Grant-in-Aid for Scientific Research(B)  Principal Investigator  23K26315 

• Development of prediction method for two-phase flow under ship bottom considering hydrodynamic characteristics on shell surface

  Project Period (FY)： 2020/04  -  2023/03  Investigator(s): 波津久達也

  Grant-in-Aid for Scientific Research(B)  Principal Investigator  20H02365 

• Development of external two-phase flow prediction method applicable to seawater environment

  Project Period (FY)： 2017/04  -  2020/03  Investigator(s): Hazuku Tatsuya

  Grant-in-Aid for Scientific Research(B)  Principal Investigator  17H03487 

  This study was aimed at developing a new analytical method for the external two-phase flow in the seawater, which contributes improvement of a ship drag reduction technology based on the air lubrication method.
  The database on local flow structures in the external two-phase flow under a model ship bottom was newly constructed through the experiment using a circulation water tunnel. Experiments for a single bubble and bubbly flows in the seawater were also performed to identify the characteristics of the interfacial drag of a single bubble and the bubble coalescence in the seawater. Based on the obtained experimental data and the analytical results, a modeling of the external two-phase flow was examined by taking the bubble layer thickness as a length scale and a new correlation for predicting void fraction under the ship bottom was successfully developed.

• Development of Motor Driven Inner Propeller in Colt Nozzle

  Project Period (FY)： 2016/04  -  2019/03  Investigator(s): TAKAMASA Tomoji

  Grant-in-Aid for challenging Exploratory Research  Co-Investigator  16K14510 

  A new type of Motor Driven Inner Propeller in Colt Nozzle has been developed and designed in this study. The nozzle has some special and unique features that set it apart from existing propulsion system. First, it utilizes a motor driven inner propeller without center hub which reduces propulsion efficiency. A pair of double reversal and variable pitch propeller is installed in the nozzle, which is a much higher efficiency than is possible under conventional colt nozzle propulsion systems. A modal shift to use of such high efficiency propulsion system could lead to significant reduction in environmental pollution. Another advantage of the system is the direct motor-driven propulsion system, which produces significantly less vibration and noise while the ship is running. The simulation revealed that the running cost for the Motor Driven Inner Propeller in Colt Nozzle is about 90 % that for a conventional colt nozzle with the same horsepower.

• Research on Seawater and Marine Sediment Sampling in Shallow Shore Region by Remotely Steerable Unmanned Battery Boat

  Project Period (FY)： 2016/04  -  2019/03  Investigator(s): TAKAMASA Tomoji

  Grant-in-Aid for Scientific Research(A)  Co-Investigator  16H02431 

  A new type of seawater and marine sediment sampling system using remotely steerable unmanned battery boat has been developed and designed in this study. The system has some special and unique features that set it apart from existing marine sampling system. First, it utilizes an innovative proactive stabilizer which can reduce pitching, rolling, and heaving of the boat by two pairs of vertical moving floats and three-dimensional thrusting propellers. Some tests in a port of nuclear power plant have revealed the effectiveness of the system. This system could lead to significant possibility in seawater and marine sediment sampling even in rough sea condition.

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Lesson Subject 【 display / non-display 】

Lesson Subject 【 display / non-display 】