AEROSPACE ejectors

THRUST ejectors

THRUST ejectors needs very precise design. A good thrust ejector may provide 1,10 to 3 times the direct jet thrust of the normal ejection of the supply flow of the ejector. Because of the size and shape, usually the thrust ejectors needs special redesign of the entire aircraft from the begining. It is very hard or impossible to add a thrust ejector to an existing aircfraft. Thrust ejector might be at any type. (photo aerodin)
Usual ejector types for this application are:

TURBOENGINE inside

TURBOENGINE inside ejectors might be used for air dillution, cooling, sucction, compression, mixing flow or other. An ejector working inside the aerospace engine is very precise device in order to fit in a available specific volume and weight. Usualy the design of the ejector might be done from the first design of the engine because some engine parts should be adapted related to the ejector. (photo www.jakpost.travel)
Usual ejector types for this application are:

HOVERCRAFTS

Using ejectors for HOVERCRAFTS represent an innovative concept. It was first designed, back in 1970 by Clement Alecsandrescu from Romania, as periferial jet in order to replace the hovercraft skirt. It is now possible to have hovercraft ejectors to generate air cushion or thrust or both. Hovercraft ejectors design might allow us to use the output skirt flow to generate useful thrust by changing the way the fluid flows. (photo Military hovercraft 8100 TD Griffon Hoverwork UK)
Usual ejector types for this application are:

ATMOSPHERE ROCKETS

In a special design of the ejector inside and outside of the rocket body, will encrease the rocket thrust. The ejector need to be well design in order to allow the flow to create less pressure and also high pressure on the rocket body, that will create a suplementary 1.1-1.3 times lift. This design usually works for the dense layer of the atmosphere and might be necessary to be done for the first stage of the space rocket. (photo ARCA)
Usual ejector types for this application are:

DS

DRONES

The future of flying DRONES moves to no mechanical moving part design, specially at the exterior of the drone. This implies to use high thrust performances ejectors that have 50-90% efficiency. There are many geometrical configuration of the ejectors that may be used for aerial drones in subsonic and supersonic flight also. First known ejector used for aircrafts was done by Henri Coanda in his lens shape (disks) designs. (photo Henri Coanda)
Usual ejector type for this application are:

DS

WIND tunnels

WIND TUNNELS giant propellers need to be replace with ejectors systems having no mechanical moving parts in the working flow. The maintenance should be reduced and also the cinematical risks including vibrations. The ejector systems may provide high velocity wind flow up to 200m/s and more in the same wind tunnel. Useful application may include testing high velocities vehicle designs in compressible flow. (photo NASA’s transonic wind tunnel)
Usual ejector types for this application are: