METHOD OF COOLING LPRE FIRE WALL AND METHOD TO THIS END Russian patent published in 2010 - IPC F02K9/64 

FIELD: engines and pumps.

SUBSTANCE: proposed method comprises feeding, separately, tangentially and consecutively, fuel components along chamber axis, generating wall inner low-temperature swirled layer, separate transfer of oxidiser and fuel from the nozzle to fire bottom, imparting additional radial and axial velocity components to introduced oxidiser and fuel and shaping central swirled current with its axial component directed to chamber nozzle on mixing them, igniting and firing. Each component is imparted additional and axial velocity components that are directed cross-moved so that resultant value of liner momentum is directed along the nozzle axis, while in combustion chamber nozzle narrow part receives, mainly, tangential additional working body at low temperature. Said working body is forced toward nozzle with unidirectional swirling relative to initial swirling in combustion chamber, hence, cooling the subsonic nozzle fire wall by low-temperature curtain thus formed. Said additional working body is bled from the flow downstream of critical section and fed via diffuser to turbine drive of auxiliary thrust generation loop to close said loop after vapor condensation and to generate thrust by multiple feed of additional working body into combustion chamber. LPRE chamber comprises combustion chamber and nozzle including curtain-cooled chamber wall, oxidiser and fuel feed manifolds and nozzle units spaced apart along the chamber lengthwise axis. Note here that the chamber is additionally furnished with additional working body feed manifold and unit for additional working body feed into the chamber that are arranged in the nozzle taper part. Behind the nozzle critical section, there is diffuser to bleed working body after cooling the fire wall that is jointed to turbine nozzle unit to drive additional working fuel feed pump.

EFFECT: higher efficiency of LPRE combustion chamber cooling.

6 cl, 1 dwg