Turbulent H2/N2 jet diffusion flames
This documentation provides information of the DLR data sets of multi-scalar measurements in non-premixed jet flames. The fuel mixture of H2 and N2 exits from a straight stainless steel tube with an inner diameter of 8 mm or 4 mm. The tube is tapered at the exit and surrounded by a flow of dry air at room temperature from a contoured co-flow nozzle. For details, see Bergmann 1998 [1]. The ambient pressure during the measurements was typically around 970 mbar. The multi-scalar measurements were performed by pointwise laser Raman scattering or Raman/LIF measurements, that are described in [2,3].
For further information, see International Workshop on Measurement and Computation of Turbulent Nonpremixed Flames (TNF) [4].
H3 Flame
H2/N2 Jet Diffusion Flame, Re=10000
This flame was selected as a "standard flame" on the "International Workshop on Measurements and Computation of Turbulent Nonpremixed Flames", Naples, July 1996. It was also investigated at the TU Darmstadt, Fachgebiet Energie- und Kraftwerkstechnik, and those data sets of the flow velocity are available from TU Darmstadt, Prof. Andreas Dreizler.
Fuel 50% H2 + 50% N2
Jet exit velocity 34.8 m/s
Reynolds number 10000
Radial profiles at x/D=2.5, 10, 20, 30, 40, 50, and 70.
Additionally, at x/D=5, 15, 25, 35, and 45 measurements have been performed on the flame axis.
Flames C1, C2, C3
H2/N2 Jet Diffusion Flame C1, C2, C3, Re=10300
In contrast to all other flames, the inner diameter of the burner was only 4 mm. The flame could be operated either as an attached or as a lifted flame. C1 and C2 are attached and identical flames, but the data sets are from different days. C3 was lifted. To allow a comparison, the measurements for the C2 and C3 flames were performed on the same day.
Fuel 75% H2 + 25% N2
Exit Velocity 94.0 m/s
Reynolds number 10300
C1 flame: radial profiles at x/D=5, 10, 20, 30, 40, 60, and 80;
C2 and C3 flames: radial profiles at x/D=5, 20, and 60.
Flame H5
H2/N2 Jet Diffusion Flame H5, Re=6200
This is another flame defined at the TU Darmstadt, Fachgebiet Energie- und Kraftwerkstechnik.
Fuel 50% H2 + 50% N2
Exit Velocity 21.7 m/s
Reynolds number 6200
Radial profiles at x/D=5, 10, 20, 40, 60, and 80.
Additionally, at x/D=30, 50, and 70 measurements have been performed on the flame axis.
Flames MA, MB, MC, MD
H2/N2 Jet Diffusion Flame MA, MB, MC, MD, Re = 12400, 9300, 6200, 3100
This is a set of four flames with equal fuel composition, but different jet exit velocities. All measurements have been performed on the same day.
Fuel 75% H2 + 25% N2
[MA] [MB] [MC] [MD]
Exit Velocity 56.4 m/s 42.3 m/s 28.2 m/s 14.1 m/s
Reynolds numbers 12400 9300 6200 3100
Only one radial profile at x/D=5 and one axial profile have been measured.
Flame M2
H2/N2 Jet Diffusion Flame M2, Re=9300
Fuel 75% H2 + 25% N2
Exit Velocity 42.3 m/s
Reynolds number 9300
Radial profiles x/D=5, 10, 20, 40, 60, and 80.
LDA velocity measurements were performed at the Technical University of Darmstadt and are documented in [5]. For further information please contact Prof. Andreas Dreizler [6].
Documentation
The designations H3, H5, M2 etc. are abbreviations for specific flame conditions and are part of the respective directory and file names in the data archives.
Measured and documented quantities available for all flames: T (determined by Raman measurements from density) and concentrations of O2, N2, H2, and H2O by Raman measurements. Additionally, NO concentrations were measured in the flames H5, M2, MA, MB, MC and MD.
Radial profiles of reported quantities have been measured at different x/D positions which are specified in the following short description of each flame. The number of samples (single shot measurements) at each position was 300.
More detailed information about measurements in the flames H3 and C1/C2/C3 are given in [2], about M2, MA-MD, and H5 in [3].
References
[1] V. Bergmann, W. Meier, D. Wolff, W. Stricker: Application of Spontaneous Raman and Rayleigh Scattering and 2D LIF for the Characterization of a Turbulent CH4/H2/N2 Jet Diffusion Flame, Appl. Phys. B 66, 489-502 (1998)
[2] W. Meier, S. Prucker, M.-H. Cao, W. Stricker: Characterization of Turbulent H2/N2/Air Jet Diffusion Flames by Single-Pulse Spontaneous Raman Scattering, Combust. Sci. Technol. 118, 293-312 (1996)
[3] W. Meier, A. O. Vyrodov, V. Bergmann, W. Stricker: Simultaneous Raman / LIF Measurements of Major Species and NO in Turbulent H2/Air Diffusion Flames, Appl. Phys. B 63, 79-90 (1996)
[4] TNF – Workshop https://tnfworkshop.org/
[5] Ch. Schneider, A. Dreizler, J. Janicka; TU Darmstadt - Flammenkatalog, Flow Field Measurements of Stable and Locally Extinguishing Hydrocarbon-Fuelled Jet Flames, Combust. Flame 135:185-190 (2003)
[6] Andreas Dreizler, Technische Universität Darmstadt