Zobrazeno 1 - 10
of 323
pro vyhledávání: '"Yuji TASAKA"'
Publikováno v:
Wind Energy, Vol 27, Iss 5, Pp 483-499 (2024)
Abstract The use of a turbo‐sail airfoil to improve the power generation of a Darrieus wind turbine was examined. The turbo‐sail airfoil comprises a symmetric blade from which a high‐speed tangential jet is produced to suppress flow separation.
Externí odkaz:
https://doaj.org/article/e6c9ac6729f24c248ed4e18343ab7c62
Publikováno v:
Journal of Fluid Science and Technology, Vol 19, Iss 2, Pp JFST0013-JFST0013 (2024)
For simulating the behavior of air bubbles injected into the turbulent boundary layer developed beneath the bottom of a ship, we propose a novel experimental system for a different driving force on flow from the bulk pressure gradient. In the propose
Externí odkaz:
https://doaj.org/article/1cc48fe99b234f9eb40a5e6c7dfddcc8
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 911, Pp 22-00115-22-00115 (2022)
We propose a method to evaluate time-dependent rheological properties, shear stress, effective viscosity and shear rate, of coagulating curd of the skimmed milk as an analog of cheese products. Ultrasonic spinning rheometry was adopted for the rheolo
Externí odkaz:
https://doaj.org/article/d00e1673702d4a759d9f3cfe290db290
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 907, Pp 21-00297-21-00297 (2022)
Drag reduction by bubble injection in turbulent boundary layers was investigated using a 36-m-long flat-bottom model ship. The model ship was towed at 8.0 m/s, resulting in a downstream-distance-based Reynolds number as high as 2.9 × 108. The total
Externí odkaz:
https://doaj.org/article/b916d85093d744558cd3c63742927082
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 86, Iss 890, Pp 20-00242-20-00242 (2020)
This paper evaluated measurement accuracy and precision of ultrasonic spinning rheometry (USR), which can evaluate rheological properties through equation of motion and velocity information captured by ultrasonic velocity profiler (UVP), in cases tha
Externí odkaz:
https://doaj.org/article/5db129a3b3124931bd03bdf262dc8925
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 86, Iss 888, Pp 20-00184-20-00184 (2020)
Aerodynamic drag on several types of road cones was measured by wind tunnel experiments purposing improvement of anti-fall-down functions against lateral wind blowing. By opening holes on the side surface of cones, drag coefficient decreased so that
Externí odkaz:
https://doaj.org/article/0b602ac5e2a24789a211850828ac6b1a
Publikováno v:
IEEE Access, Vol 5, Pp 15021-15029 (2017)
The combined use of ultrasound pulse-echo intensity and Doppler shift frequency is examined as a means to measure strong unsteady three-phase pipe flows of a gas and two liquids. With air, oil, and water as components of the fluid media, particular a
Externí odkaz:
https://doaj.org/article/0fce24756ff94a52bc68913175f7811e
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043111 (2020)
A novel rheoscopic fluid displaying coloration due to flow-induced birefringence is investigated through laboratory experiments to ascertain if it satisfies the stress-optic law in fluids in direct stress field measurements of Newtonian fluids. To va
Externí odkaz:
https://doaj.org/article/6aebbc7cdc4b47849b4376030048e68f
Publikováno v:
Journal of Fluid Science and Technology, Vol 6, Iss 6, Pp 851-859 (2011)
Wave breaking and air bubble generation by a 2-D cylinder moving beneath a free surface were experimentally investigated. Measurements of the free surface profile and visualization of the air bubbles yield the threshold and the regime diagrams of the
Externí odkaz:
https://doaj.org/article/45840ca912a7464e86bb96e7df0cbcc6
Publikováno v:
Journal of Fluid Science and Technology, Vol 1, Iss 1, Pp 12-23 (2006)
Ultrasound velocity profiler (UVP) is applied to measurements of a horizontal turbulent bubbly channel flow to ascertain the mechanism of bubble-induced frictional drag reduction. Typical parameter regimes of the target flow are Re number of 0.6-6.0
Externí odkaz:
https://doaj.org/article/3440f4934d1d4a7fb2ede54a7798768c