Additionally, its chemicalreaction time (the necessary time for the combustion chemicalreaction to take place) is 50 microseconds, ten times shorter than that of the hydrocarbons that are usually used... However, it must remain as five times greater than the chemicalreaction time, without which combustion would be poor
Now, during the ignition phase the flows and chemicalreactions change very quickly, they aren't stationary at all. This is also true of turbulent flows where the large-scale vortex structures move constantly and in an unpredictable fashion"
Does the plasma work by chemicalreactions, by raising the temperature or by hydrodynamic modification of the flows? These studies are at the frontiers of at least two disciplines: the science of combustion and the physical chemistry of plasmas
A little later Onera also developed a patented method of real-time measurement of the composition and temperature in the combustion chambers and other reactive environments like plasmas without disturbing the flows or chemicalreactions. Another invention: devices to measure the speed of gas flows e.g. around an aircraft model