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Numerical calculation of turbulent reacting flow in a model gas-turbine combustor

Darbandi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.2514/6.2009-3926
  3. Abstract:
  4. In this work, an efficient bi-implicit strategy is suitably developed within the context of a hybrid finite volume element method to solve axisymmetric turbulent reactive flow in a model gas turbine combustor. Based on the essence of a control-volume-based finite-element method, the formulation benefits from the geometrical flexibility of the finite element methods while the discrete algebraic governing equations are derived through applying the conservation laws to discrete cells distributed in the solution domain. To enhance the efficiency of method, we extend the physical influence upwinding scheme to cylindrical coordinates. This extension helps to improve the advection flux approximations at all cell faces. Besides a high level of respecting the physics of flow, this scheme provides the necessary coupling between the velocity and pressure fields. In order to achieve a better prediction of both the transport of turbulent species and the transport of mass fraction species, the two-equation k -ε turbulence model and one step mixture fraction chemistry equation are solved in a semi-implicit manner. Eventually, the extended method is used to simulate reacting flow in a model gas turbine combustor. The validation of the current numerical results is fulfilled by comparing the current results with available measurements and other reliable numerical solutions. Copyright © 2009 by M. Darbandi. Published by the American Institute of Aeronautics and Astronautics, Inc
  5. Keywords:
  6. Advection fluxes ; Axisymmetric ; Cell faces ; Conservation law ; Cylindrical coordinates ; Discrete cells ; Finite volume element method ; Gas turbine combustor ; Geometrical flexibility ; Governing equations ; Mass fraction ; Mixture fraction ; Numerical calculation ; Numerical results ; Numerical solution ; One step ; Pressure field ; Reactive flow ; Semi-implicit ; Turbulent reacting flows ; Two-equation ; Upwinding ; Algebra ; Combustion ; Combustors ; Gas turbines ; Turbomachinery ; Turbulence models ; Finite element method
  7. Source: 41st AIAA Thermophysics Conference, 22 June 2009 through 25 June 2009 ; 2009 ; 9781563479755 (ISBN)
  8. URL: https://arc.aiaa.org/doi/pdfplus/10.2514/6.2009-3926