System Analysis of Hydrocarbon-Fueled Deep-Throttlable Rocket Engine Using Gaseous Injection

Abstract

A deep-throttable rocket engine using hydrocarbon fuel is needed an essential element of next generation space propulsion systems. However, deep-thlottling capability of a rocket engine is restricted within narrow range by some factors. Then, we proposed a gas/gas injection type rocket engine to solve the problems attending on deep-throttling. On the other hand, using this type injection system made some extra problems such as the balance between chamber cooling and gasification of the propellant, the power load of auxiliary machinery, and the range of turbopump operating point. In this paper, we adopt the propellant combination of Ethanol/Oxygen and analyzed the system balance and engine performance.