Kawasaki Jukogyo Kabushiki Kaisha

Tohoku University

Hidemasa Yasuda

Akihito Abe

Akio Ochi

Tomoka Tsujiuchi

Kenji Hayama

Keisuke Takashima

Kazuyuki Nakakita

Atsushi Komuro

Taku Nonomura

Yuichi Kumamoto

A flight vehicle includes a rotor shaft projecting upward from a body; a rotor head connected to the rotor shaft; and a pair of plate structures located at the upper side of the body and extending in a front-rear direction at right and left sides of the rotor shaft. Each of the pair of plate structures includes a front end, a rear end, an inner surface facing inward in a left-right direction, and an outer surface facing outward in the left-right direction. The front ends of the pair of plate structures are located away from each other in the left-right direction. The rear ends of the pair of plate structures are located away from each other in the left-right direction. During forward flight, pressure at a side where the outer surface is located becomes lower than pressure at a side where the inner surface is located.

Flight vehicle

A flow control method is a flow control method of controlling flow around a blade of a rotary wing, a plasma actuator being disposed at the blade. The flow control method includes: determining a characteristic frequency ratio that is a characteristic value among frequency ratios, each of the frequency ratios being a ratio between an actuator driving frequency and an angle of attack changing frequency, the actuator driving frequency being a frequency of an applied voltage applied to the plasma actuator, the angle of attack changing frequency being a frequency at which an angle of attack of the blade changes in accordance with a rotation angle of the blade; setting the actuator driving frequency such that the frequency ratio becomes the characteristic frequency ratio; and applying a voltage of the set actuator driving frequency to the plasma actuator to control the flow around the blade.

Flow control method and rotary wing unit

Growing community of inventors

Kobe, Japan

Hidemasa Yasuda