NO and CO formation in an industrial gas-turbine combustion chamber using LES with the Eulerian sub-grid PDF method

Bulat, Ghenadie; Jones, W.P.; Marquis, A. J.

doi:10.1016/j.combustflame.2013.12.028

Cited by 98 publications

(85 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fresh oxidant streams, coming from the compressor at 0.3 MPa, enter the combustion chamber after being preheated to approximately 685 K [20]. Most of the air enters the combustion chamber from the radical swriler with a bulk velocity of 4.87 m/s and the rest enters from the panel air nozzle which is mounted in the vicinity to the sidewall of the combustion chamber [27]. The Reynold number is approximately 118 000 based on the inlet diameter of 0.19 m [27].…”

Section: Model Combustion Chambermentioning

confidence: 99%

“…Most of the air enters the combustion chamber from the radical swriler with a bulk velocity of 4.87 m/s and the rest enters from the panel air nozzle which is mounted in the vicinity to the sidewall of the combustion chamber [27]. The Reynold number is approximately 118 000 based on the inlet diameter of 0.19 m [27]. Fuel gas used in the experiments is German Natural Gas which consists of CH4, CO2 and N2 [27].…”

Section: Model Combustion Chambermentioning

confidence: 99%

“…The Reynold number is approximately 118 000 based on the inlet diameter of 0.19 m [27]. Fuel gas used in the experiments is German Natural Gas which consists of CH4, CO2 and N2 [27]. In this study, the hydrocarbons are simplified to reduce the computational resources of the LES approach.…”

Section: Model Combustion Chambermentioning

confidence: 99%

“…In this study, the hydrocarbons are simplified to reduce the computational resources of the LES approach. The mole fraction CH4, CO2 and N2 are set as 98.97 %, 0.27 % and 0.753 % according to the studies of Bulat et al [27]. Fuel stream is divided into two parts.…”

Section: Model Combustion Chambermentioning

confidence: 99%

“…The main stream injection with a high degree of premixing introduced from premixed nozzle which is mounted on the radical swirler to control the combustion temperature and thus ensures low NOx emissions inside the combustion chamber [20]. The pilot fuel stream introduced from the pilot fuel nozzle which is mounted on the pilot surface to form a pilot diffusion flame in the pre-chamber and thus ignites the incoming fresh fuel/oxidant streams to ensure flame stabilization under lower load conditions of the real gas turbine [27]. However, the pilot diffusion flame is usually not necessary under the experiment conditions.…”

Section: Model Combustion Chambermentioning

confidence: 99%

See 4 more Smart Citations

Large Eddy Simulation of the PVC Behavior in both Non-Reacting and Reacting Flows with Different Reynold Numbers

Shi¹,

Fu²,

Shen³

et al. 2016

IJHT

View full text Add to dashboard Cite

The effects of the Reynold number on the precessing vortex core (PVC) behavior in both non-reacting and reacting flows are numerically studied using a three-dimensional fully compressible large eddy simulation method. The predicted results show that a central toroidal recirculation zone (CTRZ) is generated in the vicinity of the axis of the combustor which is dominated by many small-scale vortices. Meanwhile, two smaller external recirculation zones (ERZs) are established in the vicinity of the sidewall of the combustion chamber. Under combustion conditions, the flow field tends to become complex, and the structure of CTRZ is more irregular compared to that of the non-reacting flow. An increase in the inlet Reynold number enlarges the magnitude of CTRZ and thus produces a more regular and stronger structure of the PVC inside the combustion chamber. Consequently, the breakdown positon of the PVC moves downstream under higher Reynold numbers. The structure of PVCs in the reacting flow mostly located in the regions of the unburned reactants within the per-chamber which is relatively smaller and irregular compared to that in the non-reacting flow. There is a linear increase in pressure oscillations amplitude and frequency with an increase in the inlet Reynold numbers. However, the Strouhal number remains relatively constant in both non-reacting and reacting flows. There is also an anticipated decrease in pressure oscillations and frequency in the reacting flow due to the compressibility effect in the reacting flow.

show abstract

Section: Model Combustion Chambermentioning

confidence: 99%

Section: Model Combustion Chambermentioning

confidence: 99%

Section: Model Combustion Chambermentioning

confidence: 99%

Section: Model Combustion Chambermentioning

confidence: 99%

Section: Model Combustion Chambermentioning

confidence: 99%

See 3 more Smart Citations

Large Eddy Simulation of the PVC Behavior in both Non-Reacting and Reacting Flows with Different Reynold Numbers

Shi¹,

Fu²,

Shen³

et al. 2016

IJHT

View full text Add to dashboard Cite

show abstract

Combustion

Poinsot

Veynante

2017

Encyclopedia of Computational Mechanics Second Edition

View full text Add to dashboard Cite

This chapter describes the basic phenomena controlling reacting flows and the corresponding computational methodologies. Combustion regimes (premixed or diffusion flames, laminar or turbulent cases, stable or unstable behavior) are first defined before introducing the basic terminology required to understand numerical techniques for reacting flows. The governing equations for combustion are more complex than those used in classical aerodynamics, and their specificities are discussed before describing numerical methods for laminar flames. Finally, the various methods used for turbulent flames are discussed, focusing on recent techniques such as direct numerical simulations and large eddy simulations.

show abstract