Assessment of a Partially Stirred Reactor combustion model to predict the Lean Blow-Out limit of a ramjet combustor

2012 ◽  
Author(s):  
T. Le Pichon ◽  
V. Sabel'nikov ◽  
Y. Moule ◽  
A. Cochet
Keyword(s):  
Combustion Model ◽  
Ramjet Combustor ◽  
Stirred Reactor ◽  
Partially Stirred Reactor

Monte Carlo Simulation for Radiative Transfer in a High-Pressure Industrial Gas Turbine Combustion Chamber

2017 ◽  
Author(s):  
Tao Ren ◽  
Michael F. Modest ◽  
Somesh Roy
Keyword(s):  
Monte Carlo ◽  
Gas Turbine ◽  
Radiation Effects ◽  
Swirling Flow ◽  
Calculation Model ◽  
Navier Stokes ◽  
Combustion Model ◽  
Stirred Reactor ◽  
Industrial Gas Turbine ◽  
Gas Turbine Burner

Radiative heat transfer is studied numerically for reacting swirling flow in an industrial gas turbine burner operating at a pressure of 15 bar. The reacting field characteristics are computed by Reynolds-averaged Navier-Stokes (RANS) equations using the k-ε model with the partially stirred reactor (PaSR) combustion model. The GRI-Mech 2.11 mechanism, which includes nitrogen chemistry, is used to demonstrate the the ability of reducing NOx emissions of the combustion system. A Photon Monte Carlo (PMC) method coupled with a line-by-line spectral model is employed to accurately account for the radiation effects. CO2, H2O and CO are assumed to be the only radiatively participating species and wall radiation is considered as well. Optically thin and PMC-gray models are also employed to show the differences between the simplest radiative calculation models and the most accurate radiative calculation model, i.e., PMC-LBL, for the gas turbine burner. It was found that radiation does not significantly alter the temperature level as well as CO2 and H2O concentrations. However, it has significant impacts on the NOx levels at downstream locations.

scholarly journals The Effect of Inlet Air Vitiation on Combustion Efficiency

1985 ◽  
Author(s):  
Fan Zuomin ◽  
Jiang Yijun
Keyword(s):  
Test Data ◽  
Calculation Method ◽  
Combustion Efficiency ◽  
Empirical Correlation ◽  
Experimental Results ◽  
Ramjet Combustor ◽  
Stirred Reactor ◽  
Good Agreement

Experimental results of the effect of inlet air vitiation produced by a vitiating preheater on combustion efficiency of a turbojet combustor and a model ramjet combustor are presented in this paper. An empirical correlation and a calculation method based on stirred reactor theory are derived to correct the vitiation effect. Results obtained by means of these two methods are in good agreement with test data.

Small-scale measurements in a partially stirred reactor

2006 ◽  
Vol 40 (5) ◽  
pp. 667-682 ◽  
Author(s):  
J. F. Krawczynski ◽  
B. Renou ◽  
L. Danaila ◽  
F. X. Demoulin
Keyword(s):  
Small Scale ◽  
Stirred Reactor ◽  
Partially Stirred Reactor

scholarly journals An a priori assessment of the Partially Stirred Reactor (PaSR) model for MILD combustion

2020 ◽  
Author(s):  
Salvatore Iavarone ◽  
Arthur Péquin ◽  
Zhi X. Chen ◽  
Nguyen Anh Khoa Doan ◽  
Nedunchezhian Swaminathan ◽  
...  
Keyword(s):  
A Priori ◽  
Mild Combustion ◽  
Stirred Reactor ◽  
Partially Stirred Reactor

scholarly journals Experimental and Numerical Investigation of a MILD Combustion Chamber for Micro Gas Turbine Applications

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3363 ◽  
Author(s):  
Valentina Fortunato ◽  
Andres Giraldo ◽  
Mehdi Rouabah ◽  
Rabia Nacereddine ◽  
Michel Delanaye ◽  
...  
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Energy Production ◽  
Kinetic Mechanism ◽  
Combustion Model ◽  
Low Oxygen ◽  
Micro Gas Turbine ◽  
Air Inlet ◽  
Mild Combustion ◽  
Stirred Reactor

In the field of energy production, cogeneration systems based on micro gas turbine cyclesappear particularly suitable to reach the goals of improving efficiency and reducing pollutants.Moderate and Intense Low-Oxygen Dilution (MILD) combustion represents a promising technologyto increase efficiency and to further reduce the emissions of those systems. The present work aims atdescribing the behavior of a combustion chamber for a micro gas turbine operating in MILD regime.The performances of the combustion chamber are discussed for two cases: methane and biogascombustion. The combustor performed very well in terms of emissions, especially CO and NOx,for various air inlet temperatures and air-to-fuel ratios, proving the benefits of MILD combustion.The chamber proved to be fuel flexible, since both ignition and stable combustion could be achievedby also burning biogas. Finally, the numerical model used to design the combustor was validatedagainst the experimental data collected. The model performs quite well both for methane and biogas.In particular, for methane the Partially Stirred Reactor (PaSR) combustion model proved to be thebest choice to predict both minor species, such as CO, more accurately and cases with lower reactivitythat were not possible to model using the Eddy Dissipation Concept (EDC). For the biogas, the mostappropriate kinetic mechanism to properly model the behavior of the chamber was selected

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