By L. Opfer, I. V. Roisman, C. Tropea (auth.), Johannes Janicka, Amsini Sadiki, Michael Schäfer, Christof Heeger (eds.)
With regard to either the environmental sustainability and working potency calls for, smooth combustion examine has to stand major ambitions, the optimization of combustion potency and the aid of toxins. This publication reviews at the combustion examine actions conducted in the Collaborative examine heart (SFB) 568 “Flow and Combustion in destiny fuel Turbine Combustion Chambers” funded by way of the German learn starting place (DFG). This aimed toward designing a totally built-in modeling and numerical simulation of the happening very advanced, coupled and interacting physico-chemical tactics, similar to turbulent warmth and mass delivery, unmarried or multi-phase flows phenomena, chemical reactions/combustion and radiation, in a position to help the improvement of complicated fuel turbine chamber concepts
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Additional resources for Flow and Combustion in Advanced Gas Turbine Combustors
Example text
At the same time, the accuracy of the model decreases for low gas velocities. There are two reasons for this behavior: The model operates with random numbers. Since less breakup events occur at low gas velocities the final airblast spray consists of less droplets. This decreases the statistical confidence level. The submodel for the motion and breakup of the liquid wall film assumes that shear stress at the gas/liquid interface is the dominant force. This might not be true for low gas velocities since inertial forces have to be taken into account.
Dynamical equations for a liquid jet. Fluid Dyn. 15(5), 644–649 (1984) 24. : The dynamics of thin liquid jets in air. J. Fluid Mech. 140, 91–111 (1984) 25. : Structure and breakup properties of sprays. Int. J. Multiphase Flow 21(Supplement), 99–127 (1995) 26. : Experimental investigation of turbulence and cavitation inside a pressure atomizer and optical characterization of the generated spray. In: 10th ICLASS Conference, Kyoto (2006) 27. : Drop formation due to turbulent primary breakup at the free surface of plane wall jets.
Janicka et al. 1007/978-94-007-5320-4 2, © Springer ScienceCBusiness Media Dordrecht 2013 29 30 P. Stephan et al. break-up and rewetting. Corresponding numerical studies of the gas–liquid flow and heat transfer along a heated wall have been conducted using Computational Fluid Dynamics (CFD). In order to track the moving gas–liquid interface, the volume of fluid (VOF) method has been adopted. Parametric numerical studies have been performed and compared with experimental data. Keywords Shear-driven thin liquid films • Wavy film flow • Film rupture • CFD • VOF Nomenclature A a, c d H h MP n p qPW tW tW,mean tL,In x, y, z Re cross-sectional area [m2 ] channel geometrical parameters (Fig.