Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Michihiro NISHI"'
Publikováno v:
Journal of Fluid Science and Technology, Vol 6, Iss 3, Pp 313-321 (2011)
As there are frequent needs to install a micro wind turbine generator in a residential area, we have developed such a downwind-type turbine rotor having the following specifications: The rotor has the tip diameter of 1.5 m and three two-dimensional N
Externí odkaz:
https://doaj.org/article/1be5e1db40ac45ea92e081a12f7f44a1
Publikováno v:
Journal of Fluid Science and Technology, Vol 1, Iss 2, Pp 147-156 (2006)
It is known that the pressure fluctuation in the runner will become large when a Francis turbine operates at the low flow rate and high head. One of the reasons is the occurrence of channel vortices, which are caused by the three-dimensional flow sep
Externí odkaz:
https://doaj.org/article/af7365ceb3f441abbb642b22811151f4
Publikováno v:
SSRN Electronic Journal.
The present paper investigates the pressure oscillations with ultra-low frequency induced by the precessing vortex rope (PVR) whose frequency f PVR is one-fifth of runner frequency for a model Francis turbine operated at part-load condition. Numerica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2e808dbb6c7dc13d1f547afb1e1737a
https://doi.org/10.2139/ssrn.3883870
https://doi.org/10.2139/ssrn.3883870
Publikováno v:
Processes, Vol 8, Iss 2, p 143 (2020)
Processes
Volume 8
Issue 2
Processes
Volume 8
Issue 2
Usage of a wide-angle diffuser may result in unfavorable separated flow and a significant diffuser loss. To improve the performance of the diffusers, inserting short splitter vanes is known as a useful method that has been demonstrated experimentally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6364f8e72e23966cf864a008dbdea758
https://www.mdpi.com/2227-9717/8/2/143
https://www.mdpi.com/2227-9717/8/2/143
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 774:012146
It is well known that strong pressure fluctuation will occur in the draft tube of a Francis turbine operated under part-load operation. The pressure fluctuation is usually due to the vortex rope as well as cavitation. However, the vortical flow and p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b85ebc3c10a3c45d02e53673eb6cabb6
https://doi.org/10.1088/1755-1315/774/1/012146
https://doi.org/10.1088/1755-1315/774/1/012146
Publikováno v:
Journal of Physics: Conference Series. 1909:012017
The stabilizer installation and air admission have been proved to be two effective ways to alleviate the pressure fluctuation in the Francis turbine draft tube. In this research, a combined method of these two ways, i.e. air admission through a fin (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d46fc7e2428680b2aeafa8dde70ce7
https://doi.org/10.1088/1742-6596/1909/1/012017
https://doi.org/10.1088/1742-6596/1909/1/012017
Autor:
Michihiro Nishi, Shuhong Liu
Publikováno v:
International Journal of Fluid Machinery and Systems. 6:33-48
If large pressure fluctuation is observed in the draft tube of a Francis turbine at part-load operation, we have generally called it draft-tube-surge. As occurrence of this phenomenon seriously affects the limit of turbine operating range, extensive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1eb97f95818f61afa8cfd7728894bc97
https://doi.org/10.5293/ijfms.2013.6.1.033
https://doi.org/10.5293/ijfms.2013.6.1.033
Publikováno v:
Journal of Fluid Science and Technology, Vol 6, Iss 3, Pp 313-321 (2011)
As there are frequent needs to install a micro wind turbine generator in a residential area, we have developed such a downwind-type turbine rotor having the following specifications: The rotor has the tip diameter of 1.5 m and three two-dimensional N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25ed19d58eac9914f926729f034d50bb
https://www.jstage.jst.go.jp/article/jfst/6/3/6_3_313/_pdf/-char/en
https://www.jstage.jst.go.jp/article/jfst/6/3/6_3_313/_pdf/-char/en
Publikováno v:
Science in China Series E: Technological Sciences. 53:105-110
A novel double suction shaft-less mini pump was developed for heat control of small energy systems in this study. The mini pump impeller with an exit diameter of 40 mm was combined with the motor rotor supported by the hybrid dynamic bearing. The spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a4f0807825ff0d54c70bd7fc01b387c
https://doi.org/10.1007/s11431-010-0022-7
https://doi.org/10.1007/s11431-010-0022-7
Publikováno v:
Science in China Series E: Technological Sciences. 53:100-104
In this short paper, we have treated the aerodynamic performance of micro downwind rotor with coning soft blades experimentally. The test wind rotor has the tip diameter of 1.5 m and three two-dimensional NACA0018 blades of 0.15 m chord whose materia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b870281fd5875e7c69412e7b1716ac67
https://doi.org/10.1007/s11431-009-0410-z
https://doi.org/10.1007/s11431-009-0410-z