caa a22 4500 606197729 CHVBK 20210128100930.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00348-015-2013-8 doi (NATIONALLICENCE)springer-10.1007/s00348-015-2013-8 Heat release and UV-Vis radiation in non-premixed hydrogen-oxygen flames [Elektronische Daten] [Thomas Fiala, Thomas Sattelmayer] The relationship between the volumetric heat release rate and radiation of non-premixed hydrogen-oxygen flames at atmospheric and elevated pressure is investigated. Both the radiation of the excited hydroxyl radical ( $${\hbox {OH}^*}$$ OH ∗ ) and the continuous blue radiation are considered. To physically interpret radiation and heat release, the phenomena are first analyzed within laminar flames following a hybrid approach: a pressurized jet flame experiment is set up to correctly measure the $${\hbox {OH}^*}$$ OH ∗ and blue radiation. The heat release rate is obtained from a complementary CFD simulation. Radiation and heat release are clearly uncorrelated for changes in pressure. Spatially, radiation and heat release occur at separate locations. To further scrutinize the laminar flame structure, non-premixed counterflow flame simulations are performed. By considering statistical ensembles of flamelets, these findings are transferred onto turbulent flames. As before, no general direct proportionality between radiation and heat release rate is observed because of flame straining. A technique for correcting these effects is applied, and its potential is evaluated. The impact of self-absorption of $${\hbox {OH}^*}$$ OH ∗ radiation at elevated pressures on its interpretation is discussed. Springer-Verlag Berlin Heidelberg, 2015 Fiala Thomas Lehrstuhl für Thermodynamik, Technische Universität München, Boltzmannstr. 15, 85747, Garching, Germany aut Sattelmayer Thomas Lehrstuhl für Thermodynamik, Technische Universität München, Boltzmannstr. 15, 85747, Garching, Germany aut Experiments in Fluids Springer Berlin Heidelberg 56/7(2015-07-01), 1-15 0723-4864 56:7<1 2015 56 348 https://doi.org/10.1007/s00348-015-2013-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-2013-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fiala Thomas Lehrstuhl für Thermodynamik, Technische Universität München, Boltzmannstr. 15, 85747, Garching, Germany aut NATIONALLICENCE 700 1- Sattelmayer Thomas Lehrstuhl für Thermodynamik, Technische Universität München, Boltzmannstr. 15, 85747, Garching, Germany aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/7(2015-07-01), 1-15 0723-4864 56:7<1 2015 56 348