A cooling device is provided with a heat sink having a plurality of fins, and a plasma actuator. Flow paths are formed between adjacent ones of the fins. The plasma actuator is provided away from the fins where the flow paths are formed. The plasma actuator has electrodes that are arranged offset in the flow path direction. The plasma actuator generates an induced air flow flowing in a direction of the flow path in the central region between adjacent fins.

The dielectric barrier discharge plasma generator includes: a dielectric substrate that exhibits a plate shape extending in a first direction and has a first surface and a second surface located on an opposite side of the first surface in a second direction orthogonal to the first direction; a first electrode disposed on the dielectric substrate on a side of the first surface; a second electrode disposed at a position separated from the second surface of the dielectric substrate in the second direction; a gas flow path that is formed by a gap between the dielectric substrate and the second electrode and through which a gas flows in a third direction orthogonal to the first direction and the second direction; and an outlet provided at a first end which is one end portion of the gas flow path in the third direction.

The present disclosure presents systems, apparatuses, and methods of active flow controls for dissipating tip vortices. In this regard, a method comprises positioning one or more serpentine plasma actuators on a top or bottom surface of one or more airfoils near a tip of an airfoil of an aircraft; and activating the one or more serpentine plasma actuators during a flight of the aircraft, wherein at least one tip vortex generated by the flight of the aircraft is reduced by an introduction of one or more airflows generated by one or more serpentine plasma actuators on the top or bottom surface of the one or more airfoils of the aircraft. Other systems, apparatuses, and methods are also presented.

Provided is a plasma device for applying a cold atmospheric plasma to a surface to be treated, in particular on textiles, leather and/or plastic fibers. The plasma device includes a housing, a plasma source in the housing, and a voltage source in the housing for applying a voltage to the plasma source, wherein the plasma device is configured to enable activation of the plasma source and/or to selectively switch the plasma source on only if a distance between the plasma source and the surface to be treated is within a predetermined distance.

In an embodiment a device includes a thermoelectric component, an electrode arranged opposite the thermoelectric component and a high voltage source configured to generate a high voltage between the thermoelectric component and the electrode sufficient to ignite a dielectric barrier discharge.

In an embodiment a device includes a thermoelectric component, an electrode arranged opposite the thermoelectric component, a high voltage source configured to generate a high voltage between the thermoelectric component and the electrode sufficient to ignite a dielectric barrier discharge, wherein the thermoelectric component includes two or more thermoelectric elements and metal bridges connecting the thermoelectric elements, and a weakly conductive layer directly contacting the metal bridges and a first ceramic plate.