Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Keiji Takeno"'
Autor:
Donatella Cirrone, Dmitriy Makarov, Andreas Friedrich, Joachim Grune, Keiji Takeno, Vladimir Molkov
Publikováno v:
Hydrogen, Vol 3, Iss 4, Pp 433-449 (2022)
An under-expanded hydrogen jet from high-pressure equipment or storage tank is a potential incident scenario. Experiments demonstrated that the delayed ignition of a highly turbulent under-expanded hydrogen jet generates a blast wave able to harm peo
Externí odkaz:
https://doaj.org/article/3501818aaaf4423b908cf54681489656
Autor:
Keiji Takeno, Hikaru Kido, Hiroki Takeda, Shohei Yamamoto, Volodymyr Shentsov, Dmitriy Makarov, Vladimir Molkov
Publikováno v:
Fire, Vol 7, Iss 2, p 48 (2024)
A hydrogen under-expanded jet released from a high-pressure vessel or equipment into the atmosphere through a 0.53 mm diameter orifice results in a sustained lifted flame for pressures above 4 MPa and flame blow-out at pressures below 3 MPa. Knowledg
Externí odkaz:
https://doaj.org/article/dd47bd1dcc544b4ab487da9ec92ba189
Autor:
Shohei YAMAMOTO, Keiji TAKENO
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 81, Iss 824, Pp 14-00641-14-00641 (2015)
The existing phenomenological soot model, which unburned fuel is considered soot precursor, cannot predict the soot emission of alcohol blend fuel with high accuracy. Therefore, we proposed to introduce the coefficient Keff including the concept of T
Externí odkaz:
https://doaj.org/article/00366338d540488d934fd0303db96ebe
Autor:
Volodymyr Shentsov, Ryo Sakatsume, Dmitriy Makarov, Vladimir Molkov, Hiroki Takeda, Shohei Yamamoto, Keiji Takeno, Shiori Hirakawa
Publikováno v:
International Journal of Hydrogen Energy. 45:10145-10154
Under-expanded hydrogen jet has characteristic shock structure immediately downstream of the nozzle exit. The shock structure depends on the ratio pEX/pA, i.e. the ratio of nozzle exit to ambient pressure, and the distributions of velocity and concen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0680afd21be4cfec211e36f9fb8b93ac
https://doi.org/10.1016/j.ijhydene.2020.01.217
https://doi.org/10.1016/j.ijhydene.2020.01.217
Publikováno v:
The Proceedings of Mechanical Engineering Congress, Japan. 2021:J011-03
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b3c33246f700f1cf48c1beee36dd428
https://doi.org/10.1299/jsmemecj.2021.j011-03
https://doi.org/10.1299/jsmemecj.2021.j011-03
Autor:
Alexander Mosqueda, Nasim Qadi, Yukihiro Motoyama, Keiji Takeno, Makoto Kobayashi, Kunio Yoshikawa
Publikováno v:
Energy & Fuels. 33:6436-6443
In this study, Erianthus arundinaceus energy grass was examined by conducting hydrothermal carbonization (HTC) using a laboratory-scale autoclave in the temperature range of (180–240 °C) and the retention time of (0–120 min). The parent material
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::730b110b6a5fb3e43223c6923e30023f
https://doi.org/10.1021/acs.energyfuels.9b00994
https://doi.org/10.1021/acs.energyfuels.9b00994
Autor:
K. Tagashira, Makoto Asahara, Kazuki Okabayashi, Keiji Takeno, M. Komori, K. Kawazoe, A.K. Hayashi
Publikováno v:
International Journal of Hydrogen Energy. 44:9071-9079
Hydrogen gas concentrations and jet velocities were measured downstream by a high response speed flame ionization detector and PIV (Particle Image Velocimetry) in order to investigate the characteristics of dispersion and ignitability for 40–82 MPa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d42e567788ee4215567cb254ee108c3f
https://doi.org/10.1016/j.ijhydene.2018.05.047
https://doi.org/10.1016/j.ijhydene.2018.05.047
Publikováno v:
International Journal of Hydrogen Energy. 43:5199-5205
Relationships between flame lift-off heights and reservoir pressure were experimentally investigated in order to clarify blow-off process of hydrogen non-premixed jet flames with a highly under-expanded jet structure. In this study, straight nozzles
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47acee41871097696886922d62854cf0
https://doi.org/10.1016/j.ijhydene.2018.01.116
https://doi.org/10.1016/j.ijhydene.2018.01.116
Publikováno v:
International Journal of Hydrogen Energy. 42:15426-15434
An experimental study has been performed on the concentration fluctuation during atmospheric diffusion of hydrogen released horizontally from 20 or 40 MPa pressurized storage. The aperture of nozzle is selected to a pinhole of d = 0.2 or 0.53 mm diam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c43a10c5a6e9a93482fa02ac6dde528d
https://doi.org/10.1016/j.ijhydene.2017.04.062
https://doi.org/10.1016/j.ijhydene.2017.04.062
Publikováno v:
Environmental Progress & Sustainable Energy. 38
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2181dd575431300193f21ab512f764b7
https://doi.org/10.1002/ep.13266
https://doi.org/10.1002/ep.13266