Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Hironori Miyazawa"'
Autor:
Akihiro UEMURA, Hironori MIYAZAWA, Takashi FURUSAWA, Satoru YAMAMOTO, Koichi YONEZAWA, Shuichi UMEZAWA, Shuichi OHMORI
Publikováno v:
Mechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00068-20-00068 (2020)
The purpose of this study is to simulate unsteady steam flows through three-stage stator and rotor blade passages in a middle-pressure steam turbine operated in a power plant while considering manufactured and secular-changed blade shapes. The shapes
Externí odkaz:
https://doaj.org/article/770a9fdda7764a8da3834281e52f7dc8
Publikováno v:
Journal of Fluid Science and Technology, Vol 12, Iss 2, Pp JFST0018-JFST0018 (2017)
The causal relationship between unsteady forces of wet-steam flows on rotor-blade rows and the steam condensation in low pressure steam turbines is still one of unresolved issues. In this study, we investigate the effect of condensation on the time-d
Externí odkaz:
https://doaj.org/article/ed6c2b1398b340cdb8e27928e3a6276b
Autor:
Yasuharu Hagita, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa, Shuichi Ohmori, Takeshi Suzuki
Publikováno v:
Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery.
Gas turbine combined cycle (GTCC) power plants daily undergo start-up, shutdown and partial-load operations to maintain load invariance of electric power supply. The off-design conditions in this process may give rise to unexpected and unsteady flow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a48915656921c61e071359f8908f5c10
https://doi.org/10.1115/gt2022-80251
https://doi.org/10.1115/gt2022-80251
Publikováno v:
Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine.
The slip velocity between water droplets and gas phase causes losses in steam turbines. The accurate prediction of the motion of coarse water droplets in wet-steam flows is crucial for the prediction of efficiency and erosion. In this study, the Eule
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85e8144e4fe96b603c9e6f64ac1eae59
https://doi.org/10.1115/gt2022-81246
https://doi.org/10.1115/gt2022-81246
Autor:
Hironori Miyazawa, Araki, K., Furusawa, T., Yamamoto, S., Umezawa, S., Yonezawa, K., Ohmori, S., Suzuki, T.
Publikováno v:
Scopus-Elsevier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b8cf3fdb215acf33720fd15345212f3
https://doi.org/10.1299/jsmeicope.2021.15.2021-0209
https://doi.org/10.1299/jsmeicope.2021.15.2021-0209
Publikováno v:
International Journal of Heat and Mass Transfer. 201:123597
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc579578ed4e63469859fb1c37fb3e1c
https://doi.org/10.1016/j.ijheatmasstransfer.2022.123597
https://doi.org/10.1016/j.ijheatmasstransfer.2022.123597
Autor:
Satoru Yamamoto, Takashi Furusawa, Koichi Yonezawa, Takeshi Suzuki, Shuichi Ohmori, Shuichi Umezawa, Akihiro Uemura, Hironori Miyazawa
Stator and rotor blades in intermediate-pressure steam turbines gradually deteriorate during operation because of solid particle erosion. In addition to that, turbine blades unexpectedly crack because of metal fatigue or thermal stress deformation. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bd842839ff3ea4fd28c0bd8494068a1
https://doi.org/10.1115/1.0002816v
https://doi.org/10.1115/1.0002816v
Autor:
Takashi Furusawa, Masayuki Sato, Hiroaki Kobayashi, Hironori Miyazawa, Kazuhiko Komatsu, Satoru Yamamoto, Cheng Yiran
Publikováno v:
Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power.
The periodic maintenance, repair, and overhaul (MRO) of turbine blades in thermal power plants are essential to maintain a stable power supply. During MRO, older and less-efficient power plants are put into operation, which results in wastage of addi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d243b83d5accad544c7930588a8f9bc
https://doi.org/10.1115/gt2021-58698
https://doi.org/10.1115/gt2021-58698
Autor:
Satoru Yamamoto, Sadatake Tomioka, Takashi Furusawa, Hironori Miyazawa, Shuto Yatsuyanagi, Takuo Onodera
Publikováno v:
International Journal of Thermal Sciences. 171:107193
This study focuses on supercritical octane flow simulation with pyrolysis reactions in a heated circular pipe to determine the multicomponent effects of changes in thermophysical properties. The reaction rate of n-octane for pyrolysis was estimated b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94738d6017408ae034dd800ec1e36ef8
https://doi.org/10.1016/j.ijthermalsci.2021.107193
https://doi.org/10.1016/j.ijthermalsci.2021.107193
Publikováno v:
International Journal of Heat and Mass Transfer. 119:720-732
This study investigates the effect of inlet wetness on transonic wet-steam and moist-air flows through turbine and compressor cascade channels. We first simulated the transonic wet-steam flows through a Bakhtar’s turbine cascade channel under wind-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::951a0e49f9a5d44f2388df8319a8079e
https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.001
https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.001