EVAPORATION AND COMBUSTION OF A SINGLE-COMPONENT FUEL IN A CHAMBER OF A LIQUID ROCKET ENGINE, LRE

Abstract : An evaporation and combustion theory of a singlecomponent liquid fuel in a ZhRD chamber was developed, which permits certain conclusions on the effect of spraying parameters as well as the physical properties of fuels and combustion products on the chamber and its characteristics. By decreasing the size of the drops, the combustion zone length in ZhRD chamber decreases. When the evaporation rate of very fine sprays becomes greater than the mass velocity because of microdiffusional turbulene combustion, the theory does not apply. With an increase of the liquid-fuel ass flow and heat conductivity of gases, the evaporation and combustion rates rise, but with the growth of gases' heat capacity and viscosity and the elevation of the fuel s density, the evaporation and combustion rates decrease. The calculated zone length for the evaporation and combustion of drops of a single-component or a previously intermixed liquid fuel is close t the length of a ZhRD chamber. (Author)