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Flow, Turbulence and Combustion

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14-12-2016

Measurements of Turbulent Jet Mixing in a Turbulent Co-Flow Including the Influence of Periodic Forcing and Heating

Authors: Joachim Klinner, Christian E. Willert

Published in: Flow, Turbulence and Combustion | Issue 3/2017

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Abstract

In this work, the turbulent mixing of a confined coaxial jet in air is investigated by means of simultaneous particle image velocimetry and planar laser induced fluorescence of the acetone seeded flow injection. The jet is injected into a turbulent duct flow at atmospheric pressure through a 90 ^∘ pipe bend. Measurements are conducted in a small scale windtunnel at constant mass flow rates and three modes of operation: isothermal steady jet injection at a Dean number of 20000 (R e _d=32000), pulsed isothermal injection at a Womersley number of 65 and steady injection at elevated jet temperatures of ΔT=50 K and ΔT=100 K. The experiment is aimed at providing statistically converged quantities of velocity, mass fraction, turbulent fluctuations and turbulent mass flux at several downstream locations. Stochastic error convergence over the number of samples is assessed within the outer turbulent shear layer. From 3000 samples the statistical error of time-averaged velocity and mass fraction is below 1 % while the error of Reynolds shear stress and turbulent mass flux components is in the of range 5-6 %. Profiles of axial velocity and turbulence intensity immediately downstream of the bend exit are in good agreement with hot-wire measurements from literature. During pulsed jet injection strong asymmetric growing of shear layer vortices lead to a skewed mass fraction profile in comparison with steady injection. Phase averaging of single shot PLIF-PIV measurements allows to track the asymmetric shear layer vortex evolvement and flow breakdown during a pulsation cycle with a resolution of 10^∘. Steady injection with increased jet temperature supports mixing downstream from 6 nozzle diameters onward.

previous article Flow Structures Associated with Turbulent Mixing Noise and Screech Tones in Axisymmetric Jets

next article Turbulent Scalar Mixing in a Skewed Jet in Crossflow: Experiments and Modeling

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Antoine, Y., Lemoine, F., Lebouché, M.: Turbulent transport of a passive scalar in a round jet discharging into a co-flowing stream. European Journal of Mechanics - B/Fluids 20(2), 275–301 (2001). doi:10.1016/S0997-7546(00)01120-1 CrossRefMATH

Efron, B., Tibshirani, R.J.: An Introduction to the Bootstrap. Monographs on Statistics & Applied Probability 57. Chapman and Hall/CRC (1994)

Brown, G.L., Roshko, A.: On density effects and large structure in turbulent mixing layers. J. Fluid Mech. 64, 775–816 (1974). doi:10.1017/S002211207400190X CrossRef

Bryant, R.A., Donbar, J.M., Driscoll, J.F.: Acetone laser induced fluorescence for low pressure/low temperature flow visualization. Exp. Fluids 28(5), 471–476 (2000). doi:10.1007/s003480050407 CrossRef

Buch, K.A., Dahm, W.J.A.: Experimental study of the fine-scale structure of conserved scalar mixing in turbulent shear flows. part 1. J. Fluid Mech. 317, 21–71 (1996). doi:10.1017/S0022112096000651 CrossRef

Chevray, R., Tutu, N.K.: Intermittency and preferential transport of heat in a round jet. J. Fluid Mech. 88, 133–160 (1978). doi:10.1017/S0022112078002025 CrossRef

Clemens, N.T.: Flow Imaging. Wiley. doi:10.1002/0471443395.img022 (2002)

Feng, H., Olsen, M., Hill, J., Fox, R.: Simultaneous velocity and concentration field measurements of passive-scalar mixing in a confined rectangular jet. Exp. Fluids 42(6), 847–862 (2007). doi:10.1007/s00348-007-0265-7 CrossRef

Feng, H., Olsen, M.G., Liu, Y., Fox, R.O., Hill, J.C.: Investigation of turbulent mixing in a confined planar-jet reactor. AIChE Journal 51(10), 2649–2664 (2005). doi:10.1002/aic.10527 CrossRef

10.

Foucaut, J.M., Carlier, J., Stanislas, M.: PIV optimization for the study of turbulent flow using spectral analysis. Meas. Sci. Technol. 15(6), 1046 (2004) [http://stacks.iop.org/0957-0233/15/i=6/a=003]CrossRef

11.

Fric, T.F., Roshko, A.: Vortical structure in the wake of a transverse jet. J. Fluid Mech. 279, 1–47 (1994). doi:10.1017/S0022112094003800 CrossRef

12.

Friehe, C.A., Atta, C.W.V., Gibson, C.H.: Jet turbulence: dissipation rate measurements and correlations. Tech. Rep. Paper AGARD-CP-93 NATO Advisory Group for Aerospace Research and Development (1971)

13.

Heinze, J., Meier, U., Behrendt, T., Willert, C., Geigle, K., Lammel, O., Lückerath: PLIF thermometry based on measurements of absolute concentrations of the oh radical. International journal of research in physical chemistry and chemical physics 225(11–12), 1315–1341 (2011). doi:10.1524/zpch.2011.0168

14.

Hellström, L., Zlatinov. M.B., Cao, G., Smits, A.J.: Turbulent pipe flow downstream a 90 ^∘ pipe. J. Fluid Mech. 735 R7, 1–12 (2013). doi:10.1017/jfm.2013.534 MATH

15.

Kalpakli, A., Örlü, R.: Turbulent pipe flow downstream a 90 ^∘ pipe bend with and without superimposed swirl. Int. J. Heat Fluid Flow 41, 103–111 (2013). doi:10.1016/j.ijheatfluidflow.2013.01.003. {ETMM9} [http://www.sciencedirect.com/science/article/pii/S0142727X13000076]CrossRef

16.

Kalpakli, A., Örlü, R., Alfredsson, P.H.: Pulsatile turbulent flow in straight and curved pipes – interpretation and decomposition of hot-wire signals. Flow, Turbulence and Combustion 94(2), 305–321 (2015). doi:10.1007/s10494-014-9571-3 CrossRef

17.

Kelso, R.M., Lim, T.T., Perry, A.E.: An experimental study of round jets in cross-flow. Journal of Fluid Mechanics 306, 111–144 (1996). doi:10.1017/S0022112096001255 CrossRef

18.

Klinner, J., Mayer, V., Heinze, J., Willert, C.: Simultaneous measurements of mixing fraction and velocities of a coaxial jet in a turbulent channel flow. In: 17th Int Symp on Applications of Laser Techniques to Fluid Mechanics. http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2014/finalworks2014/papers/03.14_3_196paper.pdf (2014)

19.

Krawczynski, J.F., Renou, B., Dimotakis, P., Danaila, L.: Determination of the mean dissipation rate of kinetic energy and passive scalar fluctuations in a partially stirred reactor (PsSR). In: 13th Int Symp on Applications of Laser Techniques to Fluid Mechanics. http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2006/downloads/papers/04_3.pdf(2006)

20.

Lipari, G., Stansby, P.K.: Review of experimental data on incompressible turbulent round jets. Flow, Turbulence and Combustion 87(1), 79–114 (2011). doi:10.1007/s10494-011-9330-7 CrossRefMATH

21.

Lozano, A., Yip, B., Hanson, R.: Acetone: a tracer for concentration measurements in gaseous flows by planar laser-induced fluorescence. Exp. Fluids 13(6), 369–376 (1992). doi:10.1007/BF00223244 CrossRef

22.

Mahesh, K.: The interaction of jets with crossflow. Annual Review of Fluid Mechanics 45 (1), 379–407 (2013). doi:10.1146/annurev-fluid-120710-101115 MathSciNetCrossRefMATH

23.

Mejía, J.M., Sadiki, A., Molina, A., Chejne, F., Pantangi, P.: Large eddy simulation of the mixing of a passive scalar in a high-schmidt turbulent jet. J. Fluids Eng. 137(3), 031,301–031,301 (2015). doi:10.1115/1.4029224 CrossRef

24.

Röhrig, R., Jakirlić, S., Tropea, C.: Comparative computational study of turbulent flow in a 90 ^∘ pipe elbow. Int. J. Heat Fluid Flow 55, 120–131 (2015). doi:10.1016/j.ijheatfluidflow.2015.07.011 [http://www.sciencedirect.com/ science/article/pii/S0142727X15000934]CrossRef

25.

Shirvan, S.: Experimental study of complex pipe flow, Tech. rep., Royal Institute of Technology Stockholm, Sweden.http://kth.diva-portal.org/smash/get/diva2:430330/FULLTEXT01 (2011)

26.

Smith, S.H., Mungal, M.G.: Mixing, structure and scaling of the jet in crossflow. J. Fluid Mech. 357, 83–122 (1998). doi:10.1017/S0022112097007891 CrossRef

27.

Stafford, J., Walsh, E., Egan, V.: A statistical analysis for time-averaged turbulent and fluctuating flow fields using particle image velocimetry. Flow Measurement and Instrumentation 26(0), 1–9 (2012). doi:10.1016/j.flowmeasinst.2012.04.013 [http://www.sciencedirect.com/science/article/pii/S0955598612000519]CrossRef

28.

Su, L.K., Clemens, N.T.: The structure of fine-scale scalar mixing in gas-phase planar turbulent jets. Journal of Fluid Mechanics 488, 1–29 (2003). doi:10.1017/S002211200300466X CrossRefMATH

29.

Su, L.K., Mungal, M.G.: Simultaneous measurements of scalar and velocity field evolution in turbulent crossflowing jets. Journal of Fluid Mechanics 513, 1–45 (2004). doi:10.1017/S0022112004009401 CrossRefMATH

30.

Thurber, M., Hanson, R.: Pressure and composition dependences of acetone laser-induced fluorescence with excitation at 248, 266, and 308 nm. Applied Physics B 69(3), 229–240 (1999). doi:10.1007/s003400050799 CrossRef

31.

Thurber, M.C., Grisch, F., Kirby, B.J., Votsmeier, M., Hanson, R.K.: Measurements and modeling of acetone laser-induced fluorescence with implications for temperature-imaging diagnostics . Appl. Opt. 37(21), 4963–4978 (1998). doi:10.1364/AO.37.004963 CrossRef

32.

Tkatchenko, I., Kornev, N., Jahnke, S., Steffen, G., Hassel, E.: Performances of LES and RANS models for simulation of complex flows in a coaxial jet mixer. Flow, Turbulence and Combustion 78(2), 111–127 (2007). doi:10.1007/s10494-006-9053-3 CrossRefMATH

33.

Tsurikov, M., Clemens, N.T.: The structure of dissipative scales in axisymmetric turbulent gas-phase jets. In: 40th Aerospace Sciences Meeting & Exhibit, 14-17 January, Reno, Nevada, AIAA 2002-0164. http://arc.aiaa.org/doi/10.2514/6.2002-164 (2002)

34.

Vollmers, H.: Detection of vortices and quantitative evaluation of their main parameters from experimental velocity data. Measurement Science and Technology 12 (8), 1199 (2001) [http://stacks.iop.org/0957-0233/12/i=8/a=329]CrossRef

35.

Willert, C.E.: High-speed particle image velocimetry for the efficient measurement of turbulence statistics. Experiments in Fluids 56(1), 17 (2015). doi:10.1007/s00348-014-1892-4 MathSciNetCrossRef

Title: Measurements of Turbulent Jet Mixing in a Turbulent Co-Flow Including the Influence of Periodic Forcing and Heating
Authors: Joachim Klinner
Christian E. Willert
Publication date: 14-12-2016
Publisher: Springer Netherlands
Published in: Flow, Turbulence and Combustion / Issue 3/2017
Print ISSN: 1386-6184
Electronic ISSN: 1573-1987
DOI: https://doi.org/10.1007/s10494-016-9789-3

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