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Advanced CFD Simulations of De Laval Nozzle for Gas Flow Analysis

This study presents a new approach using numerical simulations to analyze gas flow in a De Laval nozzle. The simulations compare RANS and LES models, focusing on boundary conditions and convergence criteria to model the jet formation and temperature profiles accurately. Theoretical Mach number discussions and statistical analyses enhance the understanding of supersonic flow in miniature nozzles. The study includes the simulation of isentropic expansion and presents SEM images of the nozzle structure for in-depth analysis.

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Advanced CFD Simulations of De Laval Nozzle for Gas Flow Analysis

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  1. Nozzle Numerical Simulations New approach of CFD simulations BGC Meeting 15-09-2017 Przemysław Smakulski

  2. Basic differencebetween the models Reynolds-averaged Navier–Stokes Previoussimulations Large eddy simulation Presentsimulation Przemysław Smakulski

  3. Boundaryconditions – Paolo’ssimulation p_chamber = 0.1 bar p_in =10 bar Nozzleφ30 mm Przemysław Smakulski

  4. CFD simulation. Chamber pressure 𝑝=0.1 [𝑏𝑎𝑟] RANSmodel SteadyState LES model TransientSelectedtime: Convergencecriteria: RMS < Przemysław Smakulski

  5. CFD simulation. Chamber pressure 𝑝=0.1 [𝑏𝑎𝑟] RANS model SteadyState ??? LES model TransientSelectedtime: Convergence criteria: RMS < Przemysław Smakulski

  6. Theoretical Mach disc dimension – presentsimulationcomparison Przemysław Smakulski

  7. Convergencecriteria (RMS) in model with LES RMS <10-6 Przemysław Smakulski

  8. Forming a jet – first s Przemysław Smakulski

  9. Statistics Przemysław Smakulski

  10. T-s diagram for nitrogen p = 10 bar Gas N2 p = 1 mbar Isentropicexpansion Real process Gas/Liquid N2 Solid N2 Przemysław Smakulski

  11. Temperature profile Przemysław Smakulski

  12. De Laval micro nozzle [1] SEM image of the throat and diverging section of themicro nozzle [1]. Throatarea: 0.0625 [1] - K. Chen, M. Winter, R.F. Huang, Supersonicflow in miniaturenozzles of planarconfiguration, J. MicromechanicsMicroengineering. 15 (2005) 1736–1744. Przemysław Smakulski

  13. Simulation of de Lavalnozzle Residiual RMS for SteadyStatecalculations Przemysław Smakulski

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