Test Data AC2-09

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SANDIA Flame D

Application Challenge AC2-09   © copyright ERCOFTAC 2019

Overview of Tests

The velocity measurements were performed with two-component fiber-optic laser Doppler anemometer (Dantec). All the details of the flow field measuring techniques applied in Sandia Flame D experiment are explained in[1]. Measured scalars for Sandia D Flame include temperature, mixture fraction, N2, O2, H2O, H2, CH4, CO, CO2, OH and NO. Experimental methods and measurement uncertainties are outlined in[1] Spontaneous Raman scattering of the beams from two Nd:YAG lasers (532 nm) was used to measure concentrations of the major species. The Rayleigh scattering signal was converted to temperature using a species-weighted scattering cross section, based on the Raman measurements. Linear laser-induced fluorescence (LIF) was used to measure OH and NO, and the fluorescence signals were corrected on a shot-to-shot basis for variations in Boltzmann fraction and collisional quenching rate. The concentration of CO was measured by Raman scattering and by two-photon laser-induced fluorescence (TPLIF).


Table EXP – A  Summary description of all test cases
Name GNDPs PDPs (Problem Definition Parameters) MPs (Measured Parameters)
  Re Fuel jet composition Pilot flame composition Detailed data DOAPs
EXP1 22400 25% of methane (CH4) and 75% of air C2H2, H2, air, CO2 and N2

Axial profiles

Tmax , z/D (Tmax )

Lconst(η , YCH4 , YO2)

Lconst(YH2O , YCO2)

YH2, max , z/D (YH2, max )

YCO, max , z/D (YCO, max )

RMSmax

z/D (RMSmax )

Radial profiles

x/D = 15, 30, 45

Fmax , Umax

r½(η) , r½(U )


Table EXP – B  Summary description of all measured parameters
MP1 MP2 MP3 DOAPs or other miscellaneous data
U, V, u ′, v ′ (ms-1) η, T, η ′, T ′ (m2s-2) YN2, RMS(YN2)

YO2, RMS(YO2)

YH2O, RMS(YH2O )

YH2, RMS(YH2)

YCH4, RMS(YCH4)

YCO, RMS(YCO )

YCO2, RMS(YCO2)

YOH, RMS(YOH )

YNO, RMS(YNO )


TEST CASE EXP1

Description of Experiment

The Application Challenge includes just one test case, Sandia Flame D with defined Reynolds number of the fuel jet and the fuel and pilot flame compositions as given in Table EXP-A.

Boundary Data

The inlet mean and fluctuating velocity at the distance x/D=1 from the burner are shown in Fig.3. The inlet parabolic profile had a maximum at the centre of the fuel nozzle of Umax = 62 m/s. The pilot flame bulk velocity Upilot = 11.4 m/s and the coflow velocity Ucfl = 0.9 m/s.

AC2-09 fig3a.gif   AC2-09 fig3b.gif
Fig. 3: Mean and RMS inlet profiles of the axial velocity.

Measurement Errors

The flow field measurement statistical errors are estimated in[1] as below 5% for the mean velocities and within 10% for fluctuating components. The scalar measurement errors are estimated and analyzed in[2]. The relative uncertainty (not including statistical noise or potential effects of spatial averaging) is estimated to be within 2% for the Raman measurements, 5% for OH, 5% for CO, and 10% for NO.

Measured Data

The velocity data (in ASCII format) can be obtained by contacting Prof. Andreas Dreizler, TU Darmstadt (dreizler@csi.tu-darmstadt.de).

The scalar data are available at http://www.sandia.gov/TNF/DataArch/FlameD.html

References

  1. 1.0 1.1 1.2 Schneider Ch., Dreizler A., Janicka J., Hassel E.P., "Flow field measurements of stable and locally extinguishing hydrocarbon-fuelled jet flames", Combustion and flames, 135, pp. 185-190, 2003
  2. Barlow R.S., Frank J.H., Proc. Comb. Inst., 27:1087,1998




Contributed by: Andrzej Boguslawski, Artur Tyliszczak — Częstochowa University of Technology

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© copyright ERCOFTAC 2011