Large Eddy Simulation of turbulent reacting flows with conjugate heat transfer and radiative heat transfer

2020 ◽  
Author(s):  
C. Fureby
Keyword(s):  
Heat Transfer ◽  
Large Eddy Simulation ◽  
Radiative Heat Transfer ◽  
Conjugate Heat Transfer ◽  
Radiative Heat ◽  
Reacting Flows ◽  
Turbulent Reacting Flows ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals High-Fidelity Multiphysics Simulation of a Confined Premixed Swirling Flame Combining Large-Eddy Simulation, Wall Heat Conduction and Radiative Energy Transfer

2017 ◽  
Author(s):  
Chai Koren ◽  
Ronan Vicquelin ◽  
Olivier Gicquel
Keyword(s):  
Heat Transfer ◽  
Heat Conduction ◽  
Large Eddy Simulation ◽  
Wall Temperature ◽  
Radiative Heat Transfer ◽  
Conjugate Heat Transfer ◽  
Radiative Heat ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Swirling Flame

A multi-physics simulation combining large-eddy simulation, conjugate heat transfer and radiative heat transfer is used to predict the wall temperature field of a confined premixed swirling flame operating under atmospheric pressure. The combustion model accounts for the effect of enthalpy defect on the flame structure whose stabilization is here sensitive to the wall heat losses. The conjugate heat transfer is accounted for by solving the heat conduction within the combustor walls and with the Hybrid-Cell Neumann-Dirichlet coupling method, enabling to dynamically adapt the coupling period. The exact radiative heat transfer equation is solved with an advanced Monte Carlo method with a local control of the statistical error. The coupled simulation is carried out with or without accounting for radiation. Excellent results for the wall temperature are achieved by the fully coupled simulation which are then further analyzed in terms of radiative effects, global energy budget and fluctuations of wall heat flux and temperature.

Large Eddy Simulation of Conjugate Heat Transfer Around a Multi-Perforated Plate With Deviation

2016 ◽  
Author(s):  
Dorian Lahbib ◽  
Antoine Dauptain ◽  
Florent Duchaine ◽  
Franck Nicoud
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Large Eddy Simulation ◽  
Conjugate Heat Transfer ◽  
Pressure Ratio ◽  
Perforated Plate ◽  
Inlet Temperature ◽  
Plate Temperature ◽  
Eddy Simulation ◽  
Large Eddy

To improve gas turbine efficiency, engine manufacturers increase both the overall compressor pressure ratio and the turbine inlet temperature, resulting into a higher thermal load of the combustion chamber walls. Cooling systems such as multi-perforated plates are in this context good candidates to lower the thermal constraints on the liners. Such technological devices consist in introducing, through submillimetric holes, a cold air flow into the boundary layer of the chamber wall. Though commonly used in industrial applications, perforations with an angle of deviation, i.e. not aligned with the main flow, have not been studied in most experimental and numerical studies. The deviation angle impacts the liner temperature by modifying the flow structure around the plate. Conjugate heat transfer computations coupling Large Eddy Simulation and heat conduction are performed on streamwise and 45 angled configurations composed of 12 rows at an operating point representative of helicopter combustors to analyze the effect of the deviation. The flow organization around the plate is modified, yielding different heat flux distribution and plate temperature. The major differences are observed within the perforations where the heat flux coefficient increases up to 54% in the configuration with deviation.

scholarly journals Conjugate heat transfer with Large Eddy Simulation for gas turbine components

2009 ◽  
Vol 337 (6-7) ◽  
pp. 550-561 ◽  
Author(s):  
Florent Duchaine ◽  
Simon Mendez ◽  
Franck Nicoud ◽  
Alban Corpron ◽  
Vincent Moureau ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Conjugate Heat Transfer ◽  
Eddy Simulation ◽  
Large Eddy
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