Design and Development of an Ethanol/LOX Injection Head for Rocket Steam Generator (45 kg/s Steam) and Experimental Study of Combustion Stability

摘要

This paper summarises DLR design efforts and experimental results of an injection head of a 45 kg/s steam generator (SG) based on rocket combustion principle. Propellants in use are liquid oxygen (LOX) and ethanol (80 %). Principles of design, history of development, design details and hot firing results are presented. Further topic of this paper is to summarise experimental investigations of combustion stability of the 45kg/s SG in order to increase margin to combustion instability. Test results of hot firing operation of different acoustic absorbers are presented . Key points are an adjustable quarter wave tube ring and a three blade prototype baffle.