Chemical Quick-Quench Probe for Aircraft Engine Emissions Measurements
Small Business Information
AERODYNE RESEARCH, INC.
45 Manning Road, Billerica, MA, 01821
AbstractThe chemical composition of the exhaust streams of aircraft engines (augmented and non-augmented) and combustors are required for the determination of combustion efficiency and for understanding pollutant formation. Typically, extractive sampling is used to measure aircraft emissions; however, these measurements are biased by chemistry that can occur as the gas sample travels through the probe and sample line. The goal of this project is to develop a reliable probe for quenching chemistry in aircraft exhaust, thus minimizing the measurement errors caused by chemical conversion during sampling. Under Phase I, ARI and its Phase II subcontractor, CFDRC, performed a comparison of potential quick-quench probe designs using advanced chemical kinetic and computation fluid-dynamic models. A prototype probe, which combines the best aspects of existing aerodynamic-quench probes and dilution probes, was constructed and shown to have good aerodynamic performance. Under Phase II, the prototype will be further refined using model-based design and laboratory testing of sampling performance (using a flat-flame burner) and aerodynamic performance (using a blowdown facility). Two rounds of engine tests will also be performed at the UTSI jet engine test bed using a novel radio-labeling technique to quantitatively determine the sampling efficiency. At the finish of this project, an optimized chemical quick-quench probe will be delivered including hardware, mechanical drawings, operating manual, and performance data.
* information listed above is at the time of submission.