The effect of the way of setting boundary conditions on the results of modeling a flow at the flameholder outlet

Abstract

The influence of different algorithms of generating inlet turbulent fluctuations on the results of calculating the flow parameters downstream the flameholder is discussed in the paper. Large eddy simulation is used on a turbulence model with a subgrid Smagorinsky-Lilli model. Propane-air mixture with a temperature of 300 K in a square-section channel is investigated. A bluff body with a base of an equilateral triangle with the side length equal to 25 mm is placed inside the channel. The mass-averaged inlet velocity is 10 m/s. Several ways of setting inlet boundary conditions are considered. Two cases without turbulence at the inlet (uniform velocity distribution across the inlet section and pipe velocity profile) and two cases with artificially modeled turbulence (vortex method and spectral turbulence synthesizer) are analyzed. The values of flow intensity upstream the stabilizer, the distribution of flow velocity and kinetic energy in longitudinal and cross sections downstream the stabilizer have been obtained. The graphs of the velocity fluctuation power density spectrum are also presented.

About the authors

O. V. Kolomzarov

Samara State Aerospace University

Author for correspondence.
Email: kolomzarov@gmail.com

Master Student

Russian Federation

V. M. Anisimov

Samara State Aerospace University

Email: vradik@mail.ru

Master Student

Russian Federation

I. A. Zubrilin

Samara State Aerospace University

Email: zubrilin416@mail.ru

Postgraduate student

Russian Federation

References

  1. Volkov К.N., Emelianov V.N. Modelirovanie krupnykh vikhrey v raschetakh turbulentnykh techeniy [Large-eddy simulation of turbulent flows in the calculations]. М.: Fizmatlit Publ., 2008. 364 p.
  2. Tabor G.R., Baba-Ahmadi M.H. Inlet conditions for large eddy simulation: A review. Computers and Fluids. 2010. V. 39, Iss. 4. P. 553-567. doi.org/10.1016/j.compfluid.2009.10.007
  3. Kile B., Garwick K., Lunch A., Gord J.R. Non-reacting and combusting flow investigation of bluff bodies in cross flow. Collection of Technical Papers - AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference. 2006. V. 11. P. 8743-8753. doi.org/10.2514/6.2006-5234
  4. Yang G., Jin H., Bai N. A Numerical Study on Premixed Bluff Body Flame of Different Bluff Apex Angle. Mathematical Problems in Engineering. 2013. V. 2013. P. 132-140. doi.org/10.1155/2013/272567
  5. Ryden R., Eriksson L.-E., Olovsson S. Large Eddy Simulation of Bluff Body Stabilized Turbulent Premixed Flame. American Society of Mechanical Engineers (Paper). 1993. P.12. doi.org/10.1115/93-gt-157
  6. Sjunesson A., Henriksson R., Lofstrom C. CARS measurements and visualization of reacting flows in bluff body stabilized flame. AIAA/SAE/ASME/ASEE 28th Joint Propulsion Conference and Exibit. 1992. V. 28. P. 48-56. doi.org/10.2514/6.1992-3650
  7. Handout for the CES-Seminar Talk Vortex Methods Matthias Kirchhart 8th May 2013.
  8. Fujii S., Eguchi K. A Comparison of Cold and Reacting Flow Around a Bluff-Body Flame Stabilizer. Transaction of the ASME. 1981. V. 103. Iss. 2. P. 328. doi.org/10.1115/1.3241741
  9. Fujii S., Gomi M., Eguchi K. Cold Flow Tests of a bluff-Body Flame Stabilizer. Journal of Fluids Engineering. 1978. V. 100, Iss. 3. P. 323-332. doi.org/10.1115/1.3448673
  10. Won-Wook Kim, Jeffrey, J. Lienau, Paul R. Van Slooten, Meredith B. Colket III, Robert E. Malecki, Saadat Syed. Towards Modeling Lean Blow Out in Gas Turbine Flameholder Aplications. Journal of Engineering for Gas Turbines and Power. 2006. Vol. 128, iss. 1. P.40-48. doi: 10.1115/1.2032450

Statistics

Views

Abstract: 3683

PDF (Russian): 2446

Dimensions

PlumX

Refbacks

  • There are currently no refbacks.

Copyright (c) 2015 VESTNIK of the Samara State Aerospace University

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies