RANS NUMERICAL SIMULATION OF LEAN PREMIXED BLUFF BODY STABILIZED COMBUSTOR: COMPARISON OF TURBULENCE MODELS

Year 2017, Volume: 3 Issue: 6 - Special Issue 6: Istanbul International Conference on Progress Applied Science (ICPAS2017), 1561 - 1573, 04.10.2017

A.f. Sudarma

https://doi.org/10.18186/journal-of-thermal-engineering.353668

Cited By: 7

Abstract

Many gas turbine combustors use bluff-body flameholders to enhance
mixing and maintain flame stabilization inside the combustor. Computational
Fluid Dynamics (CFD) can greatly help in the design and development of gas
turbine combustors. In this regard, CFD analyses using k-ε and Reynold
Stress Model (RSM) approaches are being evaluated through simulating the
combustion processes inside a bluff body stabilized gas turbine combustor where
a mixture of lean premixed methane-air are burnt. The numerical study is
performed under a steady state condition utilizing the commercial software
ANSYS-FLUENT. The simulated results are compared with available experimental
data as well as published simulation results found in the literature.  The results are presented and compared in
terms of velocity fields, temperature profiles and species distributions. The
results show that both adopted turbulence models k-ε and RSM reasonably
made a well predictions of the combustion process with such kind of combustor,
especially k-ε turbulence model.

Keywords

Combustion Modeling, Bluff-Body Flame Stabilizer, K-Ε Turbulence Model

References

• [1] Driscoll, J. and Chen, R., The role of recirculation in improving internal mixing and stability of flames. AIAA 25th Aerospace Sciences Meeting, Vol. 87, 1987, pp. 306-325.
• [2] Pan, J.C., Vangsness, M., Heneghan, S., Schmoll, W. and Ballal, D., Laser-diagnostic studies of confined turbulent premixed flames stabilized by conical bluff bodies: Data Set, Report UDR-TR-91-101991, University of Dayton, 1991.
• [3] Sjunnesson, A., Nelson, C. and Max, E., LDA measurements of velocities and turbulence in a bluff body stabilized flame. Proceedings of the 4th Int. Conf. Laser Anemometry Advances and Applications, Vol. 3, 1991, pp.83-90.
• [4] Nandula, S., Pitz, R., Barlow, R. and Fiechtner, G., Rayleigh/Raman/LIF measurements in a turbulent lean premixed combustor, 34th Aerospace Sciences Meeting and Exhibit, Nevada,1996.
• [5] Nandula, S.P., Lean premixed flame structure in intense turbulence: Rayleigh/Raman/LIF measurements and modeling, Ph.D. Thesis, Faculty of the Graduate School, Vanderbilt University, 2003.
• [6] Magnotti, G. and Barlow,R.S., Effects of high shear on the structure and thickness of turbulent premixed methane/air flames stabilized on a bluff-body burner. Combustion and Flame, Vol. 162(1), 2015,pp. 100-114.
• [7] Bray, K.N.C., The challenge of turbulent combustion. 26thSymposium (International) on Combustion, Vol. 26(1), 1996,pp. 1-26.
• [8] Fiorina, B.,Vi´e, A., Franzelli, B., Darabiha, N. and Massot, M., Modeling challenges in computing aeronautical combustion chambers. Journal Aerospace Lab, Vol. 11, 2016, pp. 19.
• [9] Pitsch, H., Large-eddy simulation of turbulent combustion. Annu. Rev. Fluid Mech., Vol. 38, 2006, pp. 453-482.
• [10] Cannon, S.M., Brewster, B.S. and Smoot, L.D., PDF modeling of lean premixed combustion using in situ tabulated chemistry. Combustion and Flame, Vol. 119(3), 1999,pp. 233-252.
• [11] Andreini, A., Bianchini, C. and Innocenti, A., Large eddy simulation of a bluff body stabilized lean premixed flame. Journal of Combustion, 2014.pp. 18.
• [12] Launder, B.E. and Spalding, D.B., Lectures in mathematical models of turbulence, Academic Press, New York, 1972.
• [13] Hanjalic, K. and Launder B., A Reynolds stress model of turbulence and its application to thin shear flows. Journal of Fluid Mechanics, Vol. 52(4), 1972, pp. 609-638.
• [14] Truelove, J.S., Three-dimensional radiation in absorbing-emitting-scattering media using the discrete-ordinates approximation. Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 39(1), 1988,pp. 27-31.
• [15] Patankar, S.V. and Spalding, D.B., A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows. International Journal of Heat and Mass Transfer, Vol. 15(10), 1972,pp. 1787-1806.
• [16] Zimont, V.L., Biagioli, F., and Syed, K., Modelling turbulent premixed combustion in the intermediate steady propagation regime. Progress in Computational Fluid Dynamics,An International Journal, Vol. 1(1-3), 2001,pp. 14-28.
• [17] Cannon, S., Zuo, B., Adumitroaie, V., and Smith, C. Linear Eddy Subgrid Modeling of a lean Premixed methane-Air Combustion, CFDRC Report 8321/8, 2002..