caa a22 4500 606198075 CHVBK 20210128100932.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00348-015-2055-y doi (NATIONALLICENCE)springer-10.1007/s00348-015-2055-y Simultaneous three-component velocity measurements in a swirl-stabilized flame [Elektronische Daten] [Raimund Schlüßler, Mike Bermuske, Jürgen Czarske, Andreas Fischer] Modern gas turbines are operated with lean fuel mixtures causing instabilities of the heat release and, by means of a thermoacoustic coupling, oscillations of the flow velocity within the flame. Since these oscillations can reduce the combustion efficiency, a better understanding of their formation mechanism and spatial origin is necessary. Therefore, simultaneous, three-component (3C) velocity measurements with high measurement rate are required. The Doppler global velocimetry with laser frequency modulation (FM-DGV) achieves measurement rates up to 100 kHz and was successfully applied for measurements in flames, but does not provide simultaneous 3C velocity data. In order to overcome this drawback, the FM-DGV is extended to allow simultaneous 3C measurements. The functionality is demonstrated by measurements within a swirl-stabilized flame. In combination with time-resolved measurements of the sound pressure and chemiluminescence emission, the spatial origin of the sound pressure emission in the acoustic far-field is identified as flow velocity and heat release oscillations in the acoustic near-field of the flame. Hence, a deeper insight into the thermoacoustic coupling can be achieved. Springer-Verlag Berlin Heidelberg, 2015 Schlüßler Raimund Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut Bermuske Mike Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut Czarske Jürgen Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut Fischer Andreas Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut Experiments in Fluids Springer Berlin Heidelberg 56/10(2015-10-01), 1-13 0723-4864 56:10<1 2015 56 348 https://doi.org/10.1007/s00348-015-2055-y 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/s00348-015-2055-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schlüßler Raimund Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut NATIONALLICENCE 700 1- Bermuske Mike Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut NATIONALLICENCE 700 1- Czarske Jürgen Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut NATIONALLICENCE 700 1- Fischer Andreas Laboratory for Measurement and Testing Techniques, Technische Universität Dresden, Helmholtzstr. 18, 01062, Dresden, Germany aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/10(2015-10-01), 1-13 0723-4864 56:10<1 2015 56 348