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Large Eddy Simulation of a Low Swirl Turbulent Jet Flow using a Simple Combustion Model

Arabnejad, Mohammad Hossein | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45026 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Farshchi, Mohammad
  7. Abstract:
  8. In this thesis, isothermal and reactive low swirl flow are investigated using the large eddy simulation (LES) method. In contrast to high swirl burner, in low swirl burner stability mechanism is not related to central recirculation zone and a detached flame stabilizes in a place where the flow velocity and flame speed are matched. Although lots of efforts have been devoted to simulate swirl flow, much of the previous simulations investigated high swirl flow in different configurations. The current research is conducted for co-annular swirl flow, isothermal low swirl flow and reactive low swirl flow. Simulation of co-annular swirl flow is performed to investigate the performance of Smagorinsky model in swirl flows and the results indicates that this model is capable to accurately predict flow dynamic in swirl flow.In simulation of reactive low swirl flow, the artificial thickening flame model is used as combustion model and effects of combustion on low swirl flow is investigated. To Examine the effect of swirl on low swirl flow, simulations are conducted for two different swirl number and effect of swirl on flow dynamic, vorticity field are discussed in both isothermal and reactive low swirl flow
  9. Keywords:
  10. Low Swirl Get Flow ; Turbulence ; Large Eddy Simulation (LES) ; Artificial Thickening Flame Model

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