Investigation of CIs in LREs - 2014 update - Zinn/Quinlan

This presentation highlights two portions of a larger research program to study combustion instabilities (CIs) in liquid rocket engines (LRE).  The first topic is the development of a real-time active acoustic impedance boundary control system, focusing on the required wave separation algorithm.  The second topic is an update of the processing techniques for high-speed, simultaneous  diagnostic data by the simultaneous dynamic decomposition (SDD).  The goal of this processing technique is to use sub-scale experimental testing to elucidate the CI driving mechanisms in full-scale LREs.