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ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336
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DERIVING QUANTITATIVE CONCENTRATION DISTRIBUTIONS FROM PLANAR LASER-INDUCED FLUORESCENCE MEASUREMENTS IN ENGINES
ABSTRAKT
Understanding the microscopic details of the formation of NO in internal combustion engines is a key step in the development of new and improved engines with lower harmful emission levels. Laser-based diagnostics can help to achieve this goal by providing multidimensional in situ information about the NO formation process in the engine itself. Especially for comparison with modeling results and their validation, quantitative concentration data must be provided. Quantitative concentration measurements with laser-induced fluorescence (LIF) under varying high-pressure, high-temperature conditions require comprehensive knowledge about the spectroscopic details of the molecule under study. This article compiles recent work of the author's research team on basic aspects of planar laser-induced fluorescence detection of NO in engines, and describes results from measurements in several engines and conclusions about our understanding of NO formation in engines.