METHOD OF INCREASING ENERGY CHARACTERISTICS OF LIQUID ROCKET ENGINES Russian patent published in 2014 - IPC F02K9/42 C10L1/16 

FIELD: chemistry.

SUBSTANCE: described is a method of increasing energy characteristics of liquid rocket engine, working on fuel components being liquid oxygen and hydrocarbon combustible, with kerosene with a liquid additive, representing a solution of highly molecular polyisobutylene (PIB) with a medium-viscosity molecular weight from 3.1·10⁶ to 4.9·10⁶ in kerosene in an amount, providing concentration of polyisobutylene in kerosene from 0.015% to 0.095% of kerosene weight, being applied as the hydrocarbon combustible; cutting of an impeller of a combustible pump of the engine turbopump unit is performed, with an external diameter of the impeller D₂ being determined by formula $$D_2=D_1{\left(\frac{1-B\cdot C}{1+A}\right)}^{\mathrm{0,5}},$$ D₁ is an external diameter of a working wheel of a standard combustible pump; A is a relative increase of the combustible pump pressure in operation with the PIB; B is a relative decrease of hydroresistance of a tract of a chamber regenerative cooling caused by the PIB impact; $$C=\frac{\Delta P_{cool}}{\Delta P_p}$$ is a ratio of hydroresistance of the tract of the chamber regenerative cooling to pressure of the pump for the supply of the component without the PIB, in order for the value of a weight ratio of components (Km) when the engine operates in nominal and forced modes with an application of kerosene with the liquid additive PIB to remain equal to the value Km when the engine works on pure kerosene.

EFFECT: increase of energy characteristics of the LRE.

2 dwg, 3 tbl