Pyrotechnic device

A pyrotechnic device comprising a main pyrotechnic charge, a firing device for firing the main pyrotechnic charge, a discharge passage for discharging the gas generated by firing the main pyrotechnic charge, wherein the gas is discharged from the discharge passage to a turbine of a turbomachine, a tank containing a cooling fluid, in communication with the discharge passage, a pressurizing device comprising an auxiliary pyrotechnic charge in communication with the tank for pressurizing the tank solely with gas generated by firing the auxiliary pyrotechnic charge, and an injector device configured to inject the cooling fluid into said gas discharge passage;

• wherein the firing device for the main pyrotechnic charge and the auxiliary pyrotechnic charge are communicably coupled to a control unit, wherein the control unit is configured to fire the auxiliary pyrotechnic charge before the main pyrotechnic charge, and wherein the auxiliary pyrotechnic charge is dimensioned so as to spread out the injection of the cooling fluid over a duration that is longer than that for which the gas generated by firing the main pyrotechnic charge is discharged.