MODEL ENGINE FOR DETERMINING BURNING RATE OF SOLID PROPELLANT IN STRESSED-DEFORMED STATE Russian patent published in 2003 - IPC

FIELD: rocket engine. SUBSTANCE: proposed engine has cylindrical channel charge of solid propellant coated over outer surface, cylindrical housing with end face cover, pressure transducer and nozzle. Charge provided with flexible inhibitory coating is hermetically cemented into housing at end face cover area. Diameter of inner surface of housing is equal to diameter of charge Ф_c. Diameter of inner surface of housing in its middle part exceeds diameter of charge by value of double maximum clearance σ_max between charge and housing. Cylindrical insert is arranged in said part of housing. Thickness of insert is σ_ins = σ_max-ε•(Ф_c-Ф_ch)/4 where is preset deformation of solid propellant; ε is diameter of charge channel. Through holes, diameter σ_ch are drilled in housing and insert. Invention provides determination of burning rate of solid propellant model charge in stressed deformed state under conditions of operation of full-scale engine. EFFECT: improved accuracy of determination of charge burning rate. 4 dwg