Numerical Investigation of Diffusion Flame in Transonic Flow with Large Pressure Gradient

A finite-volume method for the steady, compressible, reacting, turbulent Navier–Stokes equations is developed by using a steady-state-preserving splitting scheme for the stiff source terms in chemical reactions. Laminar and turbulent reacting flows in a mixing layer with a large streamwise pressure...

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Bibliographic Details
Published in:Journal of propulsion and power 2024-07, Vol.40 (4), p.519-532
Main Authors: Zhu, Yalu, Liu, Feng, Sirignano, William A.
Format: Article
Language:English
Subjects:
Acceleration
Aerodynamics
Chemical reactions
Compressibility
Design
Energy
Finite volume method
Gas turbine engines
Gases
Heat transfer
Laminar flow
Mixing layers (fluids)
Numerical analysis
Reacting flow
Transonic flow
Turbines
Turbulence
Turbulence models
Turbulent flow
Turbulent mixing
Velocity
Velocity gradient
Viscosity
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Summary:A finite-volume method for the steady, compressible, reacting, turbulent Navier–Stokes equations is developed by using a steady-state-preserving splitting scheme for the stiff source terms in chemical reactions. Laminar and turbulent reacting flows in a mixing layer with a large streamwise pressure gradient and acceleration are studied and compared to boundary-layer solutions. It reveals that chemical reactions strongly enhance turbulent transport due to the intensive production of turbulence by the increased velocity gradients and thus produce large turbulent viscosities in the reaction region. The influence of vitiated air on the combustion process and aerodynamic performance is also investigated in the cases of turbulent mixing layers and highly loaded transonic turbine cascades. Both cases indicate the viability of the turbine-burner concept.
ISSN:0748-4658
1533-3876
DOI:10.2514/1.B39341