Engineering

Plasma Technology Improves Aircraft Propulsion with Coanda Effect

European researchers have confirmed groundbreaking propulsion technology which promises a greener air transport and can leave the clipboards into the production engineering. The certificate was given by the Project feasibility Acheon involving researchers and engineers of six universities and two research institutes funded by the European Union.

The new technology overcomes the main limitations of traditional systems designed to handle admission and the output stream of the Jet engines. The new revolutionary technology is able to direct the flow and pressure of aero engines without any mechanical moving parts.

Plasma Technology Improves Aircraft Propulsion with Coanda Effect
The original air-breathing gas turbine jet engine was the turbojet. A concept brought to life by two engineers, Frank Whittle in England United Kingdom and Hans von Ohain in Germany. Compresses and heats air and then exhausts it as a high speed, high temperature jet to create thrust. While these engines are capable of giving high thrust levels, they are most efficient at very high speeds (over Mach 1), due to the low-mass-flow, high speed nature of the jet exhaust.

In addition to the simplification and lower weight, this can mean takeoff and landing on shorter runways planes quieter and less emission of pollutants. The team evaluated the technology in several conditions including an unmanned aerial vehicle (UAV), an airplane with takeoff and vertical landing (VTOL) and two great and a small passenger planes.

Coanda Effect

The concept developed by Acheon project is based on two technologies: a new air inlet nozzle and a mechanism to increase the efficiency of nozzle, called PEACE-Enhanced Plasma Actuator or Actuator is Coanda Effect, the Coanda Effect-optimized plasma.

The Coanda effect is the tendency of a stream remain along a curved surface. The name honors the Romanian Henri Coanda who was the first to recognize the practical application of the phenomenon in aircraft development.

Plasma actuator

The new inlet nozzle produces a controllable flow deflection of admission with ability to maintain preset direction and change that direction arbitrarily as function of time (or speed) of two primitive and geometric configuration of nozzle.

The plasma actuator generates an active control I need a surface adherence Coanda by means of two electrodes separated by a layer of insulating material. The electrode exposed to air receives a high voltage while the second electrode covered by a dielectric material, is connected to the Earth.

The potential difference-alternating current of several kV-generates partial ionization in the region of greatest potential which begins at the end of the electrode exposed to the air and spreads through the electrode area covered.

In the presence of the electric field ionized air (plasma) produces an attraction-repulsion in the surrounding air. Ionized particles are accelerated and convey your point through collisions for neutral air particles in the plasma on the electrode is covered. The result is an acceleration of the air near the surface of the dielectric layer.

Air vehicle architectures

According to the team, the integration of the nozzle with the Peace concept is a viable propulsion system capable of generating new architectures of aircraft and open other possibilities of technological application of Coanda effect control.