Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Nobuyuki Okura"'
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 911, Pp 22-00042-22-00042 (2022)
The aerodynamic forces acting on a train travelling in a tornado-like swirling flow were investigated using a tornado simulator and a moving model rig. Rectangular shaped vehicles in scale 1/40 and 1/67 and a round-roofed vehicle in scale 1/40 were u
Externí odkaz:
https://doaj.org/article/e47675e1a76e46d58df1e6b1a7fc62b7
Publikováno v:
Journal of Fluid Science and Technology, Vol 9, Iss 3, Pp JFST0060-JFST0060 (2014)
Behavior of the series of laminar vortex rings with circumferential flow, so-called swirl, were investigated using flow visualization, to evaluate the transport efficiency of the ejected fluid as vortex rings. In this study, the interval time of the
Externí odkaz:
https://doaj.org/article/0acced8ba4544eccafb580a192ea1272
Autor:
Kohei Obara, Guglielmo Minelli, Masahiro Suzuki, Nobuyuki Okura, Branislav Basara, Sinisa Krajnovic
Publikováno v:
Journal of Advanced Simulation in Science and Engineering. 8:12-26
A flow simulation was developed to understand the flow surrounding a train that was passing through a tornado and the resulting aerodynamic forces acting on the vehicle. Unsteady Reynolds averaged Navier-Stokes equations were solved to reproduce a pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebf237f9da256a6a6ef035f124031625
https://doi.org/10.15748/jasse.8.12
https://doi.org/10.15748/jasse.8.12
Autor:
Nobuyuki Okura, Masahiro Suzuki
Publikováno v:
JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 67:103-110
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b21b07cf2bd45e2bb704423e0f85ffba
https://doi.org/10.2322/jjsass.67.103
https://doi.org/10.2322/jjsass.67.103
Autor:
Guglielmo Minelli, Branislav Basara, Nobuyuki Okura, Sinisa Krajnovic, Masahiro Suzuki, Kohei Obara
Publikováno v:
Direct and Large-Eddy Simulation XI ISBN: 9783030049140
A tornado is defined as a destructive rotating column of air extending from a cloud to the ground. Tornadoes can cause derailment or overturning of trains. At least three train-turnover accidents in Japan are suspected to have been caused by tornadoe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88a6e8b1cfd3d7ece431bdaf7bfc6567
https://doi.org/10.1007/978-3-030-04915-7_77
https://doi.org/10.1007/978-3-030-04915-7_77
Publikováno v:
Springer Proceedings in Physics ISBN: 9783319306001
In order to investigate the vortex motion affected by buoyancy force, we experimentally formed a negatively buoyant vortex ring by pushing less dense fluid vertically downward out of a nozzle and measured the penetration depth of it in the wide Reyno
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79073f1e992513ec1ec6f6806bfdfd5d
http://id.nii.ac.jp/1476/00006232/
http://id.nii.ac.jp/1476/00006232/
Publikováno v:
JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 64:13-19
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcb162202c908aa84691a10d3c3e04f1
https://doi.org/10.2322/jjsass.64.13
https://doi.org/10.2322/jjsass.64.13
Autor:
Nobuyuki Okura, Masahiro Suzuki
Publikováno v:
Mechanical Engineering Letters. 2:16-00505
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35a5cc8e59c68e2334b4069c8d499ddc
https://doi.org/10.1299/mel.16-00505
https://doi.org/10.1299/mel.16-00505
Publikováno v:
Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17).
A tornado is one of the most powerful weather phenomena. It has high wind velocity and often brings serious damages to our lives. It also might has power to overturn trains. Actually at least three train overturn accidents in Japan were probably caus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0110f9eddb3fb873308d88f3464c51c8
https://doi.org/10.11159/ffhmt17.158
https://doi.org/10.11159/ffhmt17.158
Publikováno v:
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 77:557-567
Basic experiments were performed to investigate the use of vortex rings as a means to transport a small amount of fluid. The compact and unchanging nature of vortex rings is suitable to obtain high-density distribution of the transported fluid within
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90307f52a9fc0a60fcd140318dbaa87b
https://doi.org/10.1299/kikaib.77.557
https://doi.org/10.1299/kikaib.77.557