National Institute of Advanced Industrial Science and Technology

Takehiko Segawa

Eiichi Takahashi

Takayuki Matsunuma

Timothy Jukes

A plasma actuator includes: a dielectric layer; a first electrode provided on the obverse surface of the dielectric layer; a second electrode provided, on the reverse-surface side of the dielectric layer, in one direction from the first electrode; a floating conductor pair that is provided between the first electrode and the second electrode and that has an obverse-surface conductor provided on the obverse surface of the dielectric layer and a reverse-surface conductor provided on the reverse-surface side of the dielectric layer, the obverse-surface conductor and the reverse-surface conductor being electrically connected to each other, electrically insulated from the first electrode and the second electrode, and positioned in the order of the reverse-surface conductor and the obverse-surface conductor in the one direction from the first electrode in plan view; and a power source connected to the first electrode and the second electrode.

Plasma actuator

An apparatus for cleaning a surface of an optical window includes a first electrode that is provided inside the optical window and is covered with a dielectric material forming the optical window. A second electrode is provided around the optical window and is exposed on at least one surface of the optical window. A power supply is electrically coupled between the first electrode and the second electrode. The apparatus further includes a controller that controls the power supply so as to generate dielectric barrier discharge along the surface of the optical window by applying a high-frequency or pulsed voltage between the first electrode and the second electrode.

Cleaning apparatus for optical window, engine, and method for cleaning optical window of engine

A surface plasma actuator includes a conducting wire attached to a surface of a target object and electrically insulated from the target object. Surface plasma is generated along a neighborhood of the conducting wire by applying a pulse voltage between the conducting wire and a conductive portion on a side of the target object. An induced gas flow is generated by the surface plasma.

Growing community of inventors

Tsukuba, Japan

Takehiko Segawa