Two-circuit injector for a turbine engine combustion chamber

A combustion assembly for a turbine engine, comprising:

• a turbine engine combustion chamber;
• and
• a start-up injector for the turbine engine combustion chamber, arranged on a wall of the combustion chamber and leading to the wall of the combustion chamber via an orifice of the wall of the combustion chamber, the start-up injector comprising:
• a fuel injection circuit,
• a fuel ignition circuit comprising a first fuel injector fed by the fuel injection circuit, and an ignitor for igniting a injected fuel,
• a partitioned enclosure comprising a first compartment wherein the ignition of the injected fuel by the ignitor takes place, and a second compartment separated from the first compartment by a thermally conductive partition wall, the first compartment and the second compartment both leading to the combustion chamber via a common fuel evacuation opening and
• a principal start-up combustion circuit, comprising at least one second fuel injector fed by said fuel injection circuit, and leading to the second compartment of the partitioned enclosure by being arranged so as to inject fuel against said thermally conductive partition wall.