K-1530 Development of a Magnetic Suspension and Balance System for Wind Tunnel Experiments : Aerodynamic Characteristics of a Spherical Model

SummaryIn this article a magnetic suspension and balance system suitable for wind tunnel application is discussed. General considerations are presented that illustrate the nature of the problems to be solved as well as one solution of these problems.Finally some initial wind tunnel data are presented.

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Wind tunnel test of Japanese arrows with the JAXA 60-cm magnetic suspension and balance system

Experiments in Fluids ◽

10.1007/s00348-012-1300-x ◽

2012 ◽

Vol 53 (2) ◽

pp. 451-466 ◽

Cited By ~ 3

Author(s):

Hideo Sawada ◽

Keisuke Umezawa ◽

Tomohiro Yokozeki ◽

Akihito Watanabe ◽

Takenori Otsu

Keyword(s):

Wind Tunnel ◽

Wind Tunnel Test ◽

Magnetic Suspension ◽

Balance System

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118 Wind tunnel experiments for aerodynamic characteristics of a wind-snow protection net

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2009.84._1-18_ ◽

2009 ◽

Vol 2009.84 (0) ◽

pp. _1-18_

Author(s):

Ryo SUZUKI ◽

Atushi SAKURAI ◽

Kenkichi OHBA

Keyword(s):

Wind Tunnel ◽

Aerodynamic Characteristics ◽

Wind Tunnel Experiments

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Horizontal Wind Effect on the Aerodynamic Performance of Coaxial Tri-Rotor MAV

Applied Sciences ◽

10.3390/app10238612 ◽

2020 ◽

Vol 10 (23) ◽

pp. 8612

Author(s):

Yao Lei ◽

Yiqiang Ye ◽

Zhiyong Chen

Keyword(s):

Wind Tunnel ◽

Power Consumption ◽

Aerodynamic Characteristics ◽

Aerodynamic Performance ◽

Horizontal Wind ◽

Wind Effect ◽

Rotor Speed ◽

Wind Tunnel Experiments ◽

Air Vehicle ◽

Power Loading

The coaxial Tri-rotor micro air vehicle (MAV) is composed of three coaxial rotors where the aerodynamic characteristics of is complicated in flight especially when the wind effect is introduced. In this paper, the hovering performance of a full-scale coaxial Tri-rotor MAV is analyzed with both the simulations and wind tunnel experiments. Firstly, the wind effect on the aerodynamic performance of coaxial Tri-rotor MAV is established with different rotor speed (1500–2300 rpm) and horizontal wind (0–4 m/s). Secondly, the thrust and power consumption of coaxial Tri-rotor (L/D = 1.6) were obtained with low-speed wind tunnel experiments. Furthermore, the streamline distribution, pressure distribution, velocity contour and vortex distribution with different horizontal wind conditions are obtained by numerical simulations. Finally, combining the experiment results and simulation results, it is noted that the horizontal wind may accelerate the aerodynamic coupling, which resulting in the greater thrust variation up to 9% of the coaxial Tri-rotor MAV at a lower rotor speed. Moreover, the aerodynamic performance is decreased with more power consumption at higher rotor speed where the wind and the downwash flow are interacted with each other. Compared with no wind flow, the shape of the downwash flow and the deformation of the vortex affect the power loading and figure of metric accordingly.

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