Zobrazeno 1 - 10 of 75 pro vyhledávání: '"Yoshitsugu Naka"'
1
Akademický článek
Impact of wing-tip vibration on the development of a wing-tip vortex
Autor: Yoshitsugu NAKA, Masataka HIMEDA
Publikováno v: Journal of Fluid Science and Technology, Vol 15, Iss 3, Pp JFST0018-JFST0018 (2020)
External forcing on a wing-tip vortex can affect its instability, and therefore an optimal perturbation can improve the aerodynamic performance of the wing. The present study examined the unsteadiness of the wing-tip vortex under periodic wing-tip vi
Externí odkaz: https://doaj.org/article/bd19d56be53843acbeaea355712040d9
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2
Akademický článek
Coanda effect of a propeller airflow and its aerodynamic impact on the thrust
Autor: Yoshitsugu NAKA, Akira KAGAMI
Publikováno v: Journal of Fluid Science and Technology, Vol 15, Iss 3, Pp JFST0016-JFST0016 (2020)
The aerodynamic performance of the multi-rotor drone under the wall proximity has been investigated by experiment and numerical simulation. The propeller airflow along with the wall deflects toward the wall due to the Coanda effect, and it yields a n
Externí odkaz: https://doaj.org/article/f15225694f62463cbdaad36b7ed7c430
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3
Akademický článek
Development of an ultrasound acoustic streaming actuator for flow control
Autor: Yoshitsugu NAKA, Kento INOUE, Takumi ISHIZAKA
Publikováno v: Journal of Fluid Science and Technology, Vol 15, Iss 1, Pp JFST0003-JFST0003 (2020)
The present study aims to develop an ultrasound acoustic streaming actuator for flow control. The driving force can be derived from the continuity equation and the Navier-Stokes equation for the viscous compressible flow. Commercially available trans
Externí odkaz: https://doaj.org/article/45a0f8c8104f4a17b6dd1cc7cb7fee40
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6
Akademický článek
An Attempt for Suppression of Wing-Tip Vortex Using Plasma Actuators
Autor: Hitomi HASEBE, Yoshitsugu NAKA, Koji FUKAGATA
Publikováno v: Journal of Fluid Science and Technology, Vol 6, Iss 6, Pp 976-988 (2011)
Influence of the flow induced by dielectric barrier discharge (DBD) plasma actuators on the wing-tip vortex is investigated numerically and experimentally. The plasma actuators are installed on the suction side of the NACA0012 airfoil and operated in
Externí odkaz: https://doaj.org/article/37d751c435e74c5299a6d171586cdf89
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7
Akademický článek
Near-field Development of a Turbulent Mixing Layer Periodically Forced by a Bimorph PVDF Film Actuator
Autor: Yoshitsugu NAKA, Ken-ichiro TSUBOI, Yukinori KAMETANI, Koji FUKAGATA, Shinnosuke OBI
Publikováno v: Journal of Fluid Science and Technology, Vol 5, Iss 2, Pp 156-168 (2010)
We have performed experiments in a turbulent mixing layer with periodic forcing introduced by a Piezo Film Actuator (PFA). Three different lengths of PFAs have been used, and the effects of various combinations of forcing amplitudes and frequencies a
Externí odkaz: https://doaj.org/article/5a93a8288caf401bbafc042c7df17fb6
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8
Akademický článek
Simultaneous Measurement of Velocity and Pressure in a Wing-Tip Vortex
Autor: Yoshitsugu NAKA, Suguru AZEGAMI, Takuya KAWATA, Koji FUKAGATA, Shinnosuke OBI
Publikováno v: Journal of Fluid Science and Technology, Vol 4, Iss 1, Pp 107-115 (2009)
Simultaneous measurements of fluctuating velocity and pressure have been conducted in the near field of a wing-tip vortex trailing from a NACA0012 half wing. In the vortex core, the time-averaged streamwise velocity shows a wake-like profile which ex
Externí odkaz: https://doaj.org/article/f44bf8dcf8a34b79bca9e9dd25adf005
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