Jetoptera's Bladeless Propulsion System

Hello, in this video we are going to discuss a new concept of

propulsion

that has been called fluidic

propulsion

system

. It will be used by an aircraft under development, namely Jet Optera's J2000. The thrusters on this aircraft increase thrust simply by manipulating the flow. This interesting method can potentially create a paradigm shift in the way we think about airplanes and their propulsion

system

s. In this channel, electric aviation, we bring you the latest information from the world of sustainable air transport. Subscribe today to receive all our latest updates May 2018

jetoptera

, an aerospace company based in Edmonds, Washington, reveals its vtol flying car concept, the j2000, the rendered video had one feature that stood out: there were no visible rotating components on the propellers, also, the propellers were not drowned in the cross section that we see in All Planes, but were quite rectangular or more like a turned B shape with rounded edges.

Now many of you may point out that some of the ramjets and scramjets have no moving parts; however, they require air to move through them to reach them. On the other hand, initiated fluidic thrusters are totally different and so is their operating principle. Jetoptera claims that its fluidic propulsion system is independent i.e. it can be battery powered or it can be gas turbine powered and therefore we cover it on our channel so let's first cover what is meant by fluidics, it is a study and technique that uses small interacting flows and jets of fluid for functions usually performed by electronic devices.

In the case of the jet optera, its propulsion system uses compressed air and converts it into a small jet. of air being distributed through the outlet, this small distributed jet interacts with the ambient air in such a way that the overall flow over the wings increases by several folds, but how is this possible? A good way to understand this is to look at the

bladeless

fan. that was introduced by Dyson in 2009 even though the first patent in this space was by Toshiba in 1981 but Dyson was the first to create a commercial product the

bladeless

fan is said to multiply the air up to 15 times so let's take a look to see how the thrust increase or air multiplication happens if you look at the bladeless fan, it has a small compressor that is hidden in the stock of the fan, so the name bladeless is actually a misnomer, the Blades are only on the inside instead of on the outside, which has its advantages that will be revealed later: the compressor pushes the compressed air to a toroidal outlet through a small slit, thus creating a narrow air jet.

This outflow jet encounters a divergent surface in its path. Now the fluids tend to follow the profile. of the surface in its proximity, this is called coanda effect, so the air jet instead of flowing directly follows the profile of the diverging section, this creates a negative pressure in the middle of the ringo tube of the propellant that stimulates the air facing the propellant to be induced and drawn through the hoop, this step is called air induction and by itself can bring up to 10 times more fluid in the vapor than was released from the slot exit, but there is also a Second step which adds a little more air, this is called drag.

According to the definition, drag is the transport of fluid across an interface between two bodies of fluid by induced turbulent flow or in simple words, drag is when a fluid, in our case air, is attracted towards a current. of existing air and cannot escape due to circulation or vortices at the flow boundaries that trap the air, not that the fluid induction or entrainment technique has not been used successfully before in the world of aviation, but In a totally different application there is a device called an aspirator that is used to fill the evacuation chute on a passenger plane and works with flow induction.

Please note that it is extremely difficult to inflate the slide quickly with just an air pump and we simply cannot install a large air pump for this purpose, so the vacuum cleaner is used to suck air from the environment while the jet of Compressed air is pushed into the slide and so the evacuation slide inflates in a matter of seconds. Another application is adductors and ships that pump flooded compartments in the event of an accident at sea. water is pumped into the adductor and forced through a jet and any fluid at the inlet of the adductor is transported to the outlet and out of the compartment, so jet optera simply took Bernoulli's principle and the kwanda effect to maximize the multiplying air and using it as a propellant in an airplane, as a result, they claim to have developed an airplane that improves propulsive efficiency by 10 percent and fuel consumption by 50 percent compared to small powered airplanes by turbojets.

Jetoptera will use a gas turbine for compressed air in its different drone models and airliners have partnered with GE Aviation, which will provide them with the h-series turboprop engine to meet the 500-pound thrust force requirement for the demonstrator. of full flight jet optera 500 vtol again, this does not mean it is electric Air compressors cannot be used according to the CEO of Jet Optera. The aircraft can easily transition to battery technology once the required energy density is available. The innovation of Jet Optera does not end there, it also uses an oscillating box which has its own advantages in this type of wing.

It provides the required amount of lift in the smallest dish, reducing the footprint and making the aircraft compact. The use of boxing also eliminates tip vortices for short-span wings, giving them the highest span efficiency factor of 1.45. Note that the span efficiency factor is also called the Oswald efficiency number. It represents the change in drag with lift of a three-dimensional wing or aircraft compared to an ideal wing having the same aspect ratio and power lift distribution. The high efficiency is also representative of the low induced drag, the main benefit of the aircraft. optera arises from the synergy of the box wing with the thrusters.

Remember that the shape of the thruster is rectangular for a reason because it tries to form the core of the box wing, not only the thrust is distributed between the wings but also the strategic location. The attachment of the propeller to the airframe allows a greater amount of air to be entrained and accelerated over the wings and, due to the bladeless nature of the propeller and the clean geometry of the wing, allows the possibility of laminar flow over the majority of the wing. of the surface of the aircraft according to the

jetoptera

CEO code, all these things work together synergistically, that is why the shape of our airframe is so unique, we have a box-shaped wing design with thrusters inside and a canard in the front with thrusters behind, so the combination of increased thrust and increased lift results in a unique looking aircraft that is extremely compact and can take up less space than a helicopter. and flies much faster.

It has also been claimed to be flow efficient and does not have the percussive sound you get. a blade propeller, this aircraft will be relatively quieter. Interestingly, increased thrust has been tested before on vtol aircraft, most notably on the rockwell xfv-12, the exhaust on that aircraft was routed through spaces in the wing that opened like venetian blinds to increase available lift. Unfortunately, the aircraft's inability to meet performance requirements ended the program. Currently, Jet Optera's strategy is to start with smaller sized aircraft and gradually expand them as more learning is achieved, so it will be some time before we see aircraft like the J2000 and J4000. take to the skies, but the roadmap and plans are certainly in the works, unlike dozens of companies that have mushroomed in recent times, the exciting aspect of the optera jet is that it has already demonstrated the takeoff and landing of a wing and boxing in the form of a glider. drone that uses a fluidic propulsion system and has also successfully carried out the vtol of a scale model of the j2000 using an electric fan.

There is no doubt that the j2000 is a beautifully designed and engineered aircraft that you really want to see come true. We have in the past, our old dream of having a flying car was shattered several times, but maybe just maybe with this technology that dream can come true and this concludes the video. Please use the comments section to share your thoughts on this aircraft and its technology. I have noticed that the comments section of most of our videos is becoming a discussion forum containing a lot of information on the topic, so remember to benefit from that if you learn something new, like this video, thanks for your attention.