Research Achievements - Other -

Energy Recovery on Environmental-Control-System of Aircraft with Electric-Turbo-Compressor

Takahashi Kenji, Adachi Takahiro, Ishi Shotaro, Seki Naoki, Oyori Hitoshi

The Proceedings of the Thermal Engineering Conference ( The Japan Society of Mechanical Engineers )  2021 ( 0 ) 0120   2021

DOI CiNii Research

Cycle Analysis and Energy Recovery of a New Electric Environmental Control System Using an Electric Compressor

TAKAHASHI Kenji, ADACHI Takahiro, Ishii Shotaro, Seki Naoki, Oyori Hitoshi

The Proceedings of Conference of Tohoku Branch ( The Japan Society of Mechanical Engineers )  2021.56 ( 0 ) 114_paper   2021

DOI CiNii Research

Performance evaluation of road-heater with an aluminum-expand-mesh

Sato Yasunori, Sugawara Kazuaki, Adachi Takahiro

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research ( The Japanese Society of Snow and Ice / Japan Society for Snow Engineering )  2020 ( 0 ) 85 - 85   2020

DOI

Critical Rotation Rate and Non-Dimensionalization of Film-wise and Filament-wise Pumping-up phenomena by Rotating Cones

KANAMORI Jun, ADACHI Takahiro, OKAJIMA Junnosuke

The Proceedings of Conference of Tohoku Branch ( The Japan Society of Mechanical Engineers )  2020 ( 0 )   2020

DOI

Necessary Torque for Operating a Rotating Cone-disk-type Evaporator Using Induction Heating

OMI Shunsuke, ADACHI Takahiro, OKAJIMA Junnosuke

The Proceedings of Conference of Tohoku Branch ( The Japan Society of Mechanical Engineers )  2020 ( 0 )   2020

DOI

Inductive heating of liquid film flow by a rotating cone with permanent magnets

OMI Shunsuke, ADACHI Takahiro

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2019 ( 0 )   2019

<p>A rotating cone composed of simple structure causes a pumping-up phenomena, where filmwise or filamentwise flow pattern is generated depending on the viscosity along the slope of the cone. In this paper, we propose a heating mechanism of the flow, which uses an induction heating with permanent magnetics. The mechanism heats the flow without disturbing and contacting the flow. However, a necessary force to rotate the cone under the magnetic field is unclear. So, we investigate the relation between the necessary torque and the rotation rate. It is found that an increasing rate of the necessary torque is decreasing as the rotation rate is increasing. This is mainly because the Lorentz force is decreasing due to the induction heating.</p>

DOI

Relationship between pumping-up rotation rate, viscosity and immersed diameter in pumping-up phenomenon using rotating cones

KANAMORI Jun, ADACHI Takahiro

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2019 ( 0 )   2019

<p>It is confirmed that a cone rotating at the liquid surface causes pumping-up of liquid, where the cone is immersed by the top upside down. If the rotation rate exceeds a critical threshold, the pumping-up phenomena occur. The flow of the pumping-up phenomena is classified into two patterns such as film-wise and filament-wise. The critical threshold of the rotation rate and the resultant flow pattern depend on mainly the viscosity, immersed diameter of the cone and angle of cone. We will try to obtain a correlation of rotation rate, viscosity, immersed diameter and angle of cone on the threshold of pumping-up phenomena in order to elucidate the pumping-up mechanism. It is found that there are three categories depending on the viscosity classified as film-wise pumping-up region for the low viscosity, filament-wise pumping-up one for the high viscosity, and no pumping-up phenomenon occurs for intermediate viscosity.</p>

DOI

Development for a Pressure Accumulation System Using the Cold Energy Latent in a Cold District

USUKI Kentaro, ADACHI Takahiro

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2019 ( 0 )   2019

<p>In our study,we develop a new method how to use cold energy in a cold area.In the system,a basic principle that the volume of water shows ten percent increase when it is frozen.If the air and water are enclosed in an airtight container at the same time,the air is pressed by the frozen water when the water starts to freeze.The pressed air can be stored into an accumulator.Even in a winter season in a cold area,the air temperature outside can across the freezing point in a day.This means that the phase change both from water to ice and from ice to water can repeat in each day.Then, the pressure from the pressed air can be increased in an accumulator due to the repeated phase change.We develop a new cold energy conversion system in this study.</p>

DOI

Inductive heating of liquid film flow by a rotating cone with permanent magnets

OMI Shunsuke, ADACHI Takahiro

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2019 ( 0 ) S05515   2019

<p>A rotating cone composed of simple structure causes a pumping-up phenomena, where filmwise or filamentwise flow pattern is generated depending on the viscosity along the slope of the cone. In this paper, we propose a heating mechanism of the flow, which uses an induction heating with permanent magnetics. The mechanism heats the flow without disturbing and contacting the flow. However, a necessary force to rotate the cone under the magnetic field is unclear. So, we investigate the relation between the necessary torque and the rotation rate. It is found that an increasing rate of the necessary torque is decreasing as the rotation rate is increasing. This is mainly because the Lorentz force is decreasing due to the induction heating.</p>

DOI CiNii Research

Relationship between pumping-up rotation rate, viscosity and immersed diameter in pumping-up phenomenon using rotating cones

KANAMORI Jun, ADACHI Takahiro

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2019 ( 0 ) S05522P   2019

<p>It is confirmed that a cone rotating at the liquid surface causes pumping-up of liquid, where the cone is immersed by the top upside down. If the rotation rate exceeds a critical threshold, the pumping-up phenomena occur. The flow of the pumping-up phenomena is classified into two patterns such as film-wise and filament-wise. The critical threshold of the rotation rate and the resultant flow pattern depend on mainly the viscosity, immersed diameter of the cone and angle of cone. We will try to obtain a correlation of rotation rate, viscosity, immersed diameter and angle of cone on the threshold of pumping-up phenomena in order to elucidate the pumping-up mechanism. It is found that there are three categories depending on the viscosity classified as film-wise pumping-up region for the low viscosity, filament-wise pumping-up one for the high viscosity, and no pumping-up phenomenon occurs for intermediate viscosity.</p>

DOI CiNii Research

Development for a Pressure Accumulation System Using the Cold Energy Latent in a Cold District

USUKI Kentaro, ADACHI Takahiro

The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2019 ( 0 ) J05318P   2019

<p>In our study,we develop a new method how to use cold energy in a cold area.In the system,a basic principle that the volume of water shows ten percent increase when it is frozen.If the air and water are enclosed in an airtight container at the same time,the air is pressed by the frozen water when the water starts to freeze.The pressed air can be stored into an accumulator.Even in a winter season in a cold area,the air temperature outside can across the freezing point in a day.This means that the phase change both from water to ice and from ice to water can repeat in each day.Then, the pressure from the pressed air can be increased in an accumulator due to the repeated phase change.We develop a new cold energy conversion system in this study.</p>

DOI CiNii Research

Application to fiber manufacturing technology by using filamentwise pumping-up behaviour generated with rotating cones

Takahiro Adachi

Chemical Engineering   63 ( 12 ) 15 - 18   2018.12  [Invited]

Research paper (other academic council materials etc.)   Single author

Development for a Pressure Accumulation System Using the Cold Energy Latent in a Cold District

Usuki Kentaro, Adachi Takahiro

The Proceedings of the Thermal Engineering Conference ( The Japan Society of Mechanical Engineers )  2018 ( 0 )   2018

<p>In our study, we develop a new method how to use cold energy in a cold area. In the system, a basic principle that the volume of water shows ten percent increase when it is frozen. If the air and water are enclosed in an airtight container at the same time, the air is pressed by the frozen water when the water starts to freeze. The pressed air can be stored into an accumulator. Even in a winter season in a cold area, the air temperature outside can across the freezing point in a day. This means that the phase change both from water to ice and from ice to water can repeat in each day. Then, the pressure from the pressed air can be increased in an accumulator due to the repeated phase change. We develop a new cold energy conversion system in this study. </p>

DOI

Development of a New Water Moving Device Using Rotating Cones

FUJIWARA Shingo, ADACHI Takahiro

The Proceedings of Autumn Conference of Tohoku Branch ( The Japan Society of Mechanical Engineers )  2017 ( 0 )   2017

DOI

Transition of Pumping-up Behavior for High Viscosity Solution Using Rotating Cone and Visualization of Internal Circulation Flow

Takahashi Yutaro, Adachi Takahiro

The Proceedings of Autumn Conference of Tohoku Branch ( The Japan Society of Mechanical Engineers )  2017 ( 0 )   2017

DOI

Stability of Taylor-Couette Flow between Two Rotating Concentric Cones

SASAGAWA Sota, ADACHI Takahiro

The Proceedings of Autumn Conference of Tohoku Branch ( The Japan Society of Mechanical Engineers )  2017 ( 0 )   2017

DOI