Výsledky vyhledávání - "Katsumi SUGIMOTO"

Akademický článek

Effect of bubble motion on local heat transfer around a tube across horizontal in-line and staggered tube bundles in bubbly and intermittent flows

Autor: Hideki MURAKAWA, Yuya MIYOSHI, Kyoya ARAKI, Katsumi SUGIMOTO, Hitoshi ASANO, Shizuka MAKIMOTO

Publikováno v: Mechanical Engineering Journal, Vol 9, Iss 4, Pp 22-00069-22-00069 (2022)

Cross-flow boiling in horizontal tube bundles occurs in kettle type evaporators. Convective heat transfer due to the motion of vapor bubbles is an important factor for boiling heat transfer in the evaporator under low heat flux conditions. To clarify

Externí odkaz: https://doaj.org/article/d3308f3e6e804c2fbeeaea192aa85581

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Akademický článek

Effect of incident angle on ultrasonic transmission in steam flow for use with clamp-on ultrasonic flowmeter

Autor: Hideki MURAKAWA, Shuhei ICHIMURA, Masaki SHIMADA, Katsumi SUGIMOTO, Hitoshi ASANO, Shuichi UMEZAWA, Katsuhiko SUGITA

Publikováno v: Mechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00131-20-00131 (2020)

Energy management in industrial plants requires measurements of the steam flow rates at each usage location. A clamp-on ultrasonic flowmeter can be used to effectively measure the steam flow rates in existing pipes. An ultrasonic flowmeter is used to

Externí odkaz: https://doaj.org/article/08f6b2c495da4ac0a31769b6de0a965d

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Akademický článek

Heat Transfer Enhancement of Falling Film Evaporation on a Horizontal Tube by Thermal Spray Coating

Autor: Tsutomu Ubara, Hitoshi Asano, Katsumi Sugimoto

Publikováno v: Applied Sciences, Vol 10, Iss 5, p 1632 (2020)

Falling film evaporators are gaining popularity as substitutes to typical flooded evaporators because of their low refrigerant charge. It is important to form and keep a thin liquid film on the heat transfer surface to ensure their high heat transfer

Externí odkaz: https://doaj.org/article/84b17321d82248bf8bf79ee3eda9d77d

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Akademický článek

Mechanism of temperature fluctuation phenomena below steam-water interface in a pressurizer spray pipe

Autor: Koji MIYOSHI, Taisuke ISHIDA, Katsumi SUGIMOTO, Nobuyuki TAKENAKA

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 80, Iss 819, Pp FE0319-FE0319 (2014)

In a PWR plant, a steam-water two-phase flow may exist in the pressurizer spray pipe under a normal operating condition since the flow rate of the spray water is not sufficient to fill the horizontal section of the pipe completely. Initiation of high

Externí odkaz: https://doaj.org/article/52d8fe675aac4222871f346d21309065

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Akademický článek

Flow and temperature fluctuation mechanism in a downward branch pipe with a closed end (5th. report, Investigation of fluctuation mechanism for penetration depth)

Autor: Koji MIYOSHI, Akira NAKAMURA, Takahiro TOKURA, Katsumi SUGIMOTO, Nobuyuki TAKENAKA

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 80, Iss 817, Pp FE0255-FE0255 (2014)

Hot water in a main pipe flows into a branch pipe and forms a thermally stratified layer with cold water at a bent section. Fluctuation of the thermally stratified layer may initiates thermal fatigue crack in the branch pipe. The fluctuation mechanis

Externí odkaz: https://doaj.org/article/4ca5d4408ca14d4cbd6117d80cb8799d

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Akademický článek

Flow and temperature fluctuation mechanism in a downward branch pipe with a closed end (4th. report, Influence of inner diameter on penetration depth and fluctuation characteristics)

Autor: Koji MIYOSHI, Akira NAKAMURA, Takahiro TOKURA, Katsumi SUGIMOTO, Nobuyuki TAKENAKA

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 80, Iss 810, Pp FE0026-FE0026 (2014)

Externí odkaz: https://doaj.org/article/1a173a4e49cd4585b3e6d4fd029f3016

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