Three Dimensional Numerical Simulation of Slinger Combustor

Akhtar Danesh, Mohammad Ali | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48870 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Farshchi, Mohammad
  7. Abstract:
  8. Annular combustion chambers used in small turbine motors which incorporate centrifugal (rotary) injectors for injecting fuel, are known as Slinger combustion chambers. The Slinger injector works in such a way that fuel enters from an inner tube in motor shaft and exits with high pressure from the holes on the cylinder connected to the shaft. Because of the high centrifugal force, the fuel is sprayed with high quality after entering the combustion chamber. Type and angle of spray, fuel-air mixing type, combustion phenomena and flame stability makes this different than other annular combustion chambers. The process of combustion in the Slinger chamber of YJ402 motor is numerically simulated in this thesis. The actual 3D geometry of the chamber is calculated using precise measurement tools. Firstly the non-reacting flow field without fuel injection is simulated using the k-ω model. Then a model for fuel injection is added to the non-reacting flow using the Discrete Phase Model (DPM). In the final step, combustion process in the steady state of the motor is simulated by adding Eddy Dissipation Concept (EDC) to the previous solution. The precision of numerical solution is verified using the motor’s technical data regarding pressure loss, exit gas temprature, combustor efficiency and radial tempature disturbution at exit.Eventually the complex turbulent and reacting flow in a combustion chamber with annular injector and actual geometry is simulated in three dimensions
  9. Keywords:
  10. Combustion ; Slinger Chamber ; Discrete Phase Model ; Liquid Fuels ; Computational Fluid Dynamics (CFD) ; K-Epsilon Turbulence Model ; Fuel Injection ; Eddy Dissipation Concept (EDE)

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