A Study on Throttling, Anti-O/F Shift Operation and LOX Vaporization for Hybrid Rocket Engine with Multi-Section Swirl Injection Method

摘要

The new method of Multi-Section Swirl Injection Method, which generates swirling flows at some cross-sections in combustion chamber and increase fuel regression rate, has been propose. The method is quite powerful to increase fuel regression rate by 3 to 8 times compared with that of conventional method. However, in this method O/F shift occurs during combustion because inner radius of fuel increases and mass flow rate increases. In order to overcome this O/F shift, mass flow control of oxidizer should be controlled during combustion. Various injection methods have been investigated to keep optimum O/F during combustion. Vaporization of LOX for multi-section swirl injection method have been successfully conducted.