scholarly journals Evaluating the Concentration of Nitrogen Oxides at the Model Gas Turbine Combustion Chamber Outlet

2020 ◽  
Vol 20 (3) ◽  
pp. 17-25
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Gas Flow ◽  
Molecular Diffusion ◽  
Reaction Rates ◽  
Ideal Gas ◽  
New Technique ◽  
Maximum Temperature ◽  
Gas Turbine Combustion ◽  
Oxygen Process

The study applies a new technique for evaluating the NOx concentration when burning syngas in the gas turbine combustion chamber. The technique allows correlating the complete detailed mechanism of the Grimech 3.0 array of parallel reactions with the computer hydrodynamics equations (motion, heat and mass transfer, turbulence, and molecular diffusion equations for an ideal gas flow). Selectivity diagrams of the NOx formation process including eleven key reactions are built based on the specific reaction rates for lean and rich fuel mixtures. Verification calculations have been performed based on a model gas turbine combustion chamber within a fuel-air equivalence ratio of 0.5–2. The new technique has been applied for determining the NOx emissions and the maximum temperature of the industrial combustion chamber fire tube wall. The GE gas composition showed the best NOx emission result. The most problematic is Polk Power and Texaco syngas (oxygen process). When burning LCV gases in the primary air suction area, a recirculation zone is observed; due to the high heat release in this area, the maximum wall temperature is about 500 °С.

Study of Sequential Two-Stage Combustion in a Low-Emission Gas Turbine Combustion Chamber

2018 ◽  
Vol 65 (11) ◽  
pp. 806-817 ◽  
Author(s):  
L. A. Bulysova ◽  
A. L. Berne ◽  
V. D. Vasil’ev ◽  
M. N. Gutnik ◽  
M. M. Gutnik
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Two Stage ◽  
Stage Combustion ◽  
Low Emission ◽  
Gas Turbine Combustion

Flamelet Modeling of Pollutant Formation in a Gas Turbine Combustion Chamber Using Detailed Chemistry for a Kerosene Model Fuel

2004 ◽  
Vol 126 (4) ◽  
pp. 899-905 ◽  
Author(s):  
E. Riesmeier ◽  
S. Honnet ◽  
N. Peters
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Chemical Properties ◽  
Flamelet Model ◽  
Detailed Chemistry ◽  
Pollutant Formation ◽  
Detailed Reaction Mechanism ◽  
Polycyclic Aromatic ◽  
Gas Turbine Combustion ◽  
Eulerian Particle Flamelet Model

Combustion and pollutant formation in a gas turbine combustion chamber is investigated numerically using the Eulerian particle flamelet model. The code solving the unsteady flamelet equations is coupled to an unstructured computational fluid dynamics (CFD) code providing solutions for the flow and mixture field from which the flamelet parameters can be extracted. Flamelets are initialized in the fuel-rich region close to the fuel injectors of the combustor. They are represented by marker particles that are convected through the flow field. Each flamelet takes a different pathway through the combustor, leading to different histories for the flamelet parameters. Equations for the probability of finding a flamelet at a certain position and time are additionally solved in the CFD code. To model the chemical properties of kerosene, a detailed reaction mechanism for a mixture of n-decane and 1,2,4-trimethylbenzene is used. It includes a detailed NOx submechanism and the buildup of polycyclic aromatic hydrocarbons up to four aromatic rings. The kinetically based soot model describes the formation of soot particles by inception, further growth by coagulation, and condensation as well as surface growth and oxidation. Simulation results are compared to experimental data obtained on a high-pressure rig. The influence of the model on pollutant formation is shown, and the effect of the number of flamelets on the model is investigated.

Sign in / Sign up

Export Citation Format

Share Document