For the application in the next generation of gas turbines.

The Advancement of the Tesla Diode

A fluidic diode is a passive device which is has a smaller flow resistance in its preferred direction compared to the opposite direction. The basic concept was patented by Nikola Tesla in 1916. It is based on obstructions which promote more laminar flow in the preferred direction and strong turbulence in the opposite direction. The main advantage of such a device is that these valves have no moving parts and thereby require effectively no maintenance. However, these devices have practically seen no application since their invention.

In combustion engines such as gas turbines, flash back can not only stop the combustion process but can also cause severe damage to the engine or turbine. In order to prevent any flash back during operation, FDX has devised a check valve which is based on the principle of a fluidic diode. The diode was developed for highly reactive mixtures such air with dimethyl-ether. The FDX diode provides a greater resistance ratio between preferred and opposite direction in comparison to the Tesla diode. This means that the pressure loss in the preferred direction is smaller and that the resistance in the opposite direction is higher. The diode developed by FDX proved to be highly reliable in combustion tests and will find its application in the next generation of gas turbines. If you are interested in a fluidic diode, we would be happy to provide additional information.


Gas Turbines

Reactive Flows/
High Temperature Flows