What is it about?
Previous experiments in hypersonic testing facilities have shown the presence of metallic impurities in the flow. In our study, it is postulated that the erosion of the shock tunnel walls introduced iron atoms in the flow that were unintentionally excited with the laser when exciting OH. We believe that it is possible to use this situation to our benefit and purposely excite iron atoms with a laser beam to create iron PLIF images.
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Why is it important?
Our findings prove the presence of iron in sufficient quantities to generate a strong fluorescence signal. This can affect PLIF images if not dealt with properly, but also presents a valuable alternative diagnostic method for scramjet and hypersonic research.
Perspectives
I hope the findings of our work will be of help to other researchers performing experiments in high-enthalpy facilities.
Tamara Sopek
Read the Original
This page is a summary of: Iron Contamination in High-Enthalpy Test Facilities: OH PLIF Imaging Considerations, Journal of Propulsion and Power, January 2020, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.b37676.
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