Laser Based, Non-Intrusive Measurement System for Analysis of Jet Engine Flows

摘要

This document summarizes an effort to establish the feasibility of a techniquewhich will allow the remote determination of the local flow velocity, temperature and density of selected species present in the combustion and exhaust flows of hydrocarbon fueled scram jet engine test facilities. We have developed a data acquisition system which is capable of high speed date collection (several kHZ) for time periods of many seconds before pausing for data transfer. This program demonstrated a system prototype with a 16 millisecond capacity on a high speed combustor flow and demonstrated that the local flow speed, temperature, and density can be recovered from the data. This data was used to estimate the potential signal levels which might be attained on the test facilities and discuss how this approach might be configured and optimized on the quartz-walled test flow being developed there.