Electrolytic igniter for e.g. cryogenic engine, has electric circuit to support central electrode with respect to potential of another electrode such that electrolyte causes inflammation of gaseous mixture at outlet of fuel injection device

摘要

The igniter has an electric supply circuit to support a central electrode (5) at the potential comprised between 50 and 1000 V with respect to the potential of another electrode of an injector (2) such that the electrolyte injected by an injection hole (1) causes inflammation of gaseous mixture. The mixture is formed at the outlet of a fuel injection device (26) and an oxidizer injection device (27) in a combustion chamber of a torch igniter incorporable in a main injector. An insulation part is made of aluminum and is brazed on the electrode (5) and an insulator support. The electrode is made up of refractory material of type tungsten or tungsten and rhenium mixture. The electrolyte is constituted of nitrate based monopropellant in an aqueous solution of salt such as ammonium salt, ionic liquid constituted of either di-ethylammonium format component or ethyl-methyl-imidazolium tetra fluoroborate.