|
Link |
|
|
|
|
IHARA Tomonori
|
Research Areas 【 display / non-display 】
-
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering
Papers 【 display / non-display 】
-
Practical Considerations on Ultrasonic Velocity Profile Measurement of Hydrothermal Vent Fluid
Ihara Tomonori, Hazuku Tatsuya , 2023.11
12th International Symposium on Measurement Techniques for Multiphase Flow
-
Investigation of the Influence of the Background Ocean Current on Flow Measurements Using the UVP Method
Ueno Satomi, Ihara Tomonori , 2023.10
14th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering
-
水素燃料電池を搭載した内航客船の概要
大出 剛，井原 智則，山元 康博，牧平 尚久，三宅 庸介 , 2023.01
マリンエンジニアリング
-
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
-
Development of an instantaneous velocity-vector-profile method using conventional ultrasonic transducers
Dongik YOON, Hyun Jin PARK, Tomonori IHARA , 2021.12
Measurement Science and Technology
Grant-in-Aid for Scientific Research 【 display / non-display 】
-
Project Period (FY)： 2023/04 - 2026/03 Investigator(s): 波津久 達也
Grant-in-Aid for Scientific Research(B) Co-Investigator 23K26315
-
Experimental modeling of hydrothermal fluid flow focusing on velocity field
Project Period (FY)： 2021/04 - 2024/03 Investigator(s): 井原 智則
Grant-in-Aid for Young Scientists Principal Investigator 21K14360
-
Project Period (FY)： 2020/04 - 2023/03 Investigator(s): Hazuku Tatsuya
Grant-in-Aid for Scientific Research(B) Co-Investigator 20H02365
From the viewpoint of advancing the air-lubrication method, a technique for reducing ship drag by supplying air to the ship's bottom, the final target of this study was to develop a two-phase flow analysis method that can reproduce the effects of wall surface characteristics on the two-phase flow structure and wall friction characteristics beneath a ship's bottom. Two-phase flow experiments with varying wall surface roughness were conducted using an apparatus that simulates two-phase flow beneath a ship's bottom. An experimental database on velocity distribution in the boundary layer, local two-phase flow structures, and frictional resistance before and after bubble supply was newly constructed. Based on the obtained database, the impact factors, including gas-liquid flow rate and channel wall roughness, were evaluated on the two-phase flow structure and constitutive equations regarding the two-phase flow structure and frictional resistance.
-
Development of Quantitative Observation Technique for Fluid Flow Rate at Hydrothermal vents
Project Period (FY)： 2018/04 - 2021/03 Investigator(s): Ihara Tomonori
Grant-in-Aid for Young Scientists Principal Investigator 18K13937
Quantitative measurement of hydrothermal vent flow rate is necessary to determine the capacity of hydrothermal deposits, which are one of the important marine resources. In order to measure the capacity of hydrothermal vent as "a resource conveyorrom the crust", it is necessary to measure the flow rate quantitatively. In addition to that, long-term observation is desired to investigate the period of activity. However, long-term observation of the flow rate was difficult due to the nature of the hydrothermal fluids for conventional flow meters. In this study, we developed a method to quantitatively measure the flow rate of hydrothermal jets by measuring the flow itself based on the ultrasonic velocity profile method. The idea of the method was firstly experimentally validated in the laboratory scale experiment. Then, the applicability of the method to the actual deep-sea hydrothermal vents was evaluated.
-
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) Co-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.
Lesson Subject 【 display / non-display 】
-
Lesson Subject（Undergraduate）
学外実習
-
海洋流体工学