DEVICE FOR FUEL LASER IGNITION IN LIQUID-PROPELLANT ROCKET ENGINE COMBUSTION CHAMBER Russian patent published in 2014 - IPC F02K9/95 

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises electric power source and laser radiation unit with waveguides, at least one laser spark plug with focusing lens fitted at combustion chamber nozzle board with inner and outer walls. In compliance with this invention, every laser ignition plug is arranged on periphery of nozzle plate at the angle to combustion chamber axis and composed of hollow barrel. The latter is arranged outside the combustion chamber and connected by metal sleeve with the inside of combustion chamber. One microchip-laser is arranged inside said barrel and connected by connected tube with the lens at the end sealed relative to said metal sleeve. Damping means is fitted inside every barrel. It is made of material of high heat conductivity. Rubberized metal is used as said damping means. Heat accumulator is arranged inside the barrel. Heat accumulator is composed of a cylinder with central bore arranged concentrically with barrel axis. Aforesaid lens can be fitted inside metal sleeve and recessed therein relative to combustion chamber nozzle board internal wall inner surface. Depth of said recess can make 0.1-1.0 of focusing lens diameter.

EFFECT: reliable repeated ignition of fuel.

10 cl, 11 dwg