A multilayer construction for aerodynamic riblets includes a first layer composed of a material with protuberances, the first layer material exhibiting a first characteristic having long-term durability and a second layer composed of a material, exhibiting a second characteristic with capability for adherence to a surface.

An applicator for application onto and embossing microprofiling of a fluidic medium on a substrate, in particular in the aerospace sector, and a corresponding application device having such an applicator. The applicator has a circumferentially moving die that has an embossing profile, a press for the die and a stabilizing device, in particular a hardening device, for the applied medium. In addition, the applicator has a hollow support body, surrounded by the die at a distance forming a gap, the press being arranged in the gap. The application device has, in addition to the applicator, a handling device for a relative movement between the applicator and a workpiece.

An applicator for application onto and embossing microprofiling of a fluidic medium on a substrate, in particular in the aerospace sector, and a corresponding application device having such an applicator. The applicator has a circumferentially moving die that has an embossing profile, a press for the die and a stabilizing device, in particular a hardening device, for the applied medium. In addition, the applicator has a hollow support body, surrounded by the die at a distance forming a gap, the press being arranged in the gap. The application device has, in addition to the applicator, a handling device for a relative movement between the applicator and a workpiece.

Device mountable on a surface (10), the device comprising a spacer system (12, 16, 20, 22) and a grid structure (2) which grid structure (2) is attached in spaced relation to the surface (10) by means of the spacer system (12, 16, 20, 22), wherein the distance between the surface (10) and the grid structure (2) is in a range from >0.1 m to <10 mm, wherein the grid structure (2) forms meshes of a mesh size in a range from >0.5 m to <8 mm, and wherein the surface of the grid structure (2) is at least partially amphiphobic. Method of maintaining a gas or air layer on a surface when the surface is immersed in a liquid or water comprising such device, and uses thereof.

A drag reduction structure wherein a first portion including a plurality of convex portions and concave portions, and a second portion are placed on a first surface; a height from a bottom portion of the concave portion to a top portion of the convex portion, of the first portion, is 10 ?m or more and 1000 ?m or less; a length of the first portion in a second direction is 30 mm or more; and a width of the first portion and a width of the second portion, in a first direction crossing the second direction, is 0.2 mm or more and 50 mm or less.

An article that includes a vortex-generator device may include various features. For example, the article may include a material layer and one or more elongate members coupled to the material layer. In addition, the one or more elongate members interconnect two or more vortex generators.

Disclosed is a method of manufacturing an airfoil structure. The airfoil structure includes a plurality of airfoils, a support for supporting the airfoils, and a case for covering the airfoils. Each airfoil includes an airfoil body, and an airflow generator for producing induced airflow by generating plasma. The method includes a process of forming the airflow generator that includes a first electrode forming step of forming a first electrode on the airfoil body, a dielectric layer forming step of forming a dielectric layer on the airfoil body by forming ceramic powder into a film to cover the first electrode through room temperature impact consolidation, and a second electrode forming step of forming a second electrode on a surface of the dielectric layer, such that the second electrode is electrically connected to the first electrode, and an alternating-current voltage is applied to the second electrode.

A microstructured surface with microfeatures formed thereon and defining spaces between the microfeatures includes least one electrode of an electrode pair in the spaces, wherein electrodes of the pair are electrically connected to one another. The at least one electrode located in the space is configured to generate a gas in between the microfeatures when an electrolyte solution penetrates into the microfeatures. Importantly, the electrodes are not connected to any external power source. Because the microstructured surface is self-powered in replenishing the gas lost in a submerged condition, no additional provision to supply energy or regulate the replenishment is necessary for implementation and use.

An article with controllable wettability includes a substrate and a layer of a composite material supported on the substrate. The layer has an exposed surface and the composite material includes particles that have controllable polarization embedded fully or partially in a matrix. A controller is operable to selectively apply a controlled variable activation energy to the layer. The controllable polarization of the particles varies responsive to the controlled variable activation energy such that a wettability of the exposed surface also varies responsive to the controlled variable activation energy.

A processing apparatus has: a light irradiation apparatus that irradiates a surface of an object with a processing light; and a measurement apparatus that measures a position of an irradiation area, which is formed on the surface of the object by the light irradiation apparatus, relative to the object.