Abstract
Mixing and combustion of buoyant reacting flows from rectangular, square and round sources are investigated using Direct Numerical Simulation (DNS). The full Navier-Stokes equations and the finite-rate Arrhenius-type chemical reactions are simulated by high-order methods. Axis switching is observed in the rectangular plume of aspect ratio 3 but not in the case of aspect ratio 2. A new explanation of the aspect ratio effect is proposed, which is confirmed by the higher level of vorticity and entrainment rate along the major axis as compared with those along the minor axis. Finally, the DNS data are used to validate two newly constructed subgrid-scale (SGS) models for the highly non-linear radiative heat transfer source.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
J. Bardina, J. H. Ferziger and W. C. Reynolds (1984), Improved turbulence models based on LES of homogeneous incompressible turbulent flows, Report No. TF-19, Department of Mechanical Engineering, Stanford University.
P. E. DesJardin and S. H. Frankel (1998), Large-eddy simulation of a nonpremixed reacting jet: application and assessment of subgrid-scale combustion models, Phys. Fluids A 10 (9): 2298–2314.
P. E. DesJardin and S. H. Frankel (1999), Two-dimensional large eddy simulation of soot formation in the near-field of a strongly radiating nonpremixed acetylene-air turbulent jet flame, Combust. Flame 119: 121–132.
N. Docquier, S. Candel (2002), Combustion control and sensors: a review, Progress in Energy and Combustion Sciences 28 (2): 107–150.
E. J. Gutmark and F. F. Grinstein (1999), Flow control with non-circular jets, Annu. Rev. Fluid Mech. 31: 239–272.
X. Jiang and K. H. Luo (2001), Direct numerical simulation of transitional non-circular buoyant reactive jets, Theoret. Comput. Fluid Dynamics 15: 183–198.
X. Jiang and K. H. Luo (2003), Dynamics and structure of transitional buoyant jet diffusion flames with side-wall effects, Combustion and Flame 133 (1–2): 29–45.
K. H. Luo and X. Jiang (2002), Passive control of flow entrainment in buoyant reacting jets, in: I.P. Castro, P. E. Hancock, T. G. Thomas (Eds.), Advances in Turbulence IX, Proc. Ninth European Turbulence Conference, Southampton, U.K., 2–5 July, pp. 569–572.
P. Moin and K. Mahesh (1998), Direct numerical simulation: A tool in turbulence research, Annu. Rev. Fluid Mech. 30: 539–578.
P. G. Saffman (1992), Vortex dynamics, Cambridge University Press, Cambridge.
X. Zhou, K. H. Luo and J. J. R. Williams (2002), Vortex dynamics in spatio-temporal development of reacting plumes, Combust. Flame 129: 11–29.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2004 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Luo, K.H. (2004). Enhancement of Mixing and Combustion in Buoyant Non-Circular Plumes. In: Friedrich, R., Geurts, B.J., Métais, O. (eds) Direct and Large-Eddy Simulation V. ERCOFTAC Series, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2313-2_41
Download citation
DOI: https://doi.org/10.1007/978-1-4020-2313-2_41
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-6575-9
Online ISBN: 978-1-4020-2313-2
eBook Packages: Springer Book Archive