scholarly journals Large-Eddy Simulation of Realistic Gas Turbine Combustors

AIAA Journal ◽  
2006 ◽  
Vol 44 (4) ◽  
pp. 698-708 ◽  
Author(s):  
P. Moin ◽  
S. V. Apte
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Gas Turbine Combustors ◽  
Eddy Simulation ◽  
Large Eddy

Large eddy simulation and preliminary modeling of the flow downstream a variable geometry swirler for gas turbine combustors

2011 ◽  
Vol 38 (8) ◽  
pp. 1104-1109 ◽  
Author(s):  
Yehia A. Eldrainy ◽  
Khalid M. Saqr ◽  
Hossam S. Aly ◽  
Tholudin Mat Lazim ◽  
Mohammad Nazri Mohd Jaafar
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Variable Geometry ◽  
Gas Turbine Combustors ◽  
Eddy Simulation ◽  
Large Eddy

Large Eddy Simulation of a Realistic Gas Turbine Combustor

2016 ◽  
Author(s):  
Baopeng Xu ◽  
Ya Liu ◽  
Rong Xie
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Vortex Core ◽  
Swirling Flow ◽  
Lagrangian Approach ◽  
Complex Flow ◽  
Combustion Dynamics ◽  
Gas Turbine Combustors ◽  
Eddy Simulation ◽  
Large Eddy

This paper proposes a large eddy simulation approach for the modeling of combusting flow with spray in realistic gas turbine combustors. A one equation subgrid model is used to model the effect of the unresolved subgrid scales on the resolved large scales. Subgrid combustion is modeled by an extended eddy dissipation model in which the filtered reaction rate is controlled by the turbulent mixing rate between the fine structures and the surrounding fluids. An Eulerian-Lagrangian approach is used to model the two-phase spray flow, and spray particles are tracked by a two-way coupling Lagrangian approach. Then the proposed approach is applied to simulate a combusting spray flow in an industrial annular combustor. The objectives of this study are to demonstrate its capability to investigate the complex flow and combustion dynamics in realistic gas turbine combustors. The predicted instantaneous and time averaged fields of velocity, temperature, pressure, fuel mass fraction are investigated. The precessing vortex core caused by the swirling flow as well as pressure oscillations is examined. The predicted results nicely reproduce the flow, spray and combustion dynamics and successfully capture the main features of the studied combustor, such as the processing vortex core. Finally, the predicted exit temperature and the total pressure loss are compared with experimental data and good agreements are obtained.

Large-eddy simulation of two-phase spray combustion for gas turbine combustors

2008 ◽  
Vol 28 (11-12) ◽  
pp. 1365-1374 ◽  
Author(s):  
Ying-wen Yan ◽  
Jian-xing Zhao ◽  
Jing-zhou Zhang ◽  
Yong Liu
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Spray Combustion ◽  
Two Phase ◽  
Gas Turbine Combustors ◽  
Eddy Simulation ◽  
Large Eddy

Large Eddy Simulation of Flow and Heat Transfer Mechanism in Matrix Cooling Channel

2017 ◽  
Author(s):  
Yigang Luan ◽  
Lianfeng Yang ◽  
Bo Wan ◽  
Tao Sun
Keyword(s):  
Heat Transfer ◽  
Flow Field ◽  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Transfer Mechanism ◽  
Heat Transfer Mechanism ◽  
Longitudinal Vortices ◽  
Eddy Simulation ◽  
Flow And Heat Transfer ◽  
Large Eddy

Gas turbine engines have been widely used in modern industry especially in the aviation, marine and energy fields. The efficiency of gas turbines directly affects the economy and emissions. It’s acknowledged that the higher turbine inlet temperatures contribute to the overall gas turbine engine efficiency. Since the components are subject to the heat load, the internal cooling technology of turbine blades is of vital importance to ensure the safe and normal operation. This paper is focused on exploring the flow and heat transfer mechanism in matrix cooling channels. In order to analyze the internal flow field characteristics of this cooling configuration at a Reynolds number of 30000 accurately, large eddy simulation method is carried out. Methods of vortex identification and field synergy are employed to study its flow field. Cross-sectional views of velocity in three subchannels at different positions have been presented. The results show that the airflow is strongly disturbed by the bending part. It’s concluded that due to the bending structure, the airflow becomes complex and disordered. When the airflow goes from the inlet to the turning, some small-sized and discontinuous vortices are formed. Behind the bending structure, the size of the vortices becomes big and the vortices fill the subchannels. Because of the structure of latticework, the airflow is affected by each other. Airflow in one subchannel can exert a shear force on another airflow in the opposite subchannel. It’s the force whose direction is the same as the vortex that enhances the longitudinal vortices. And the longitudinal vortices contribute to the energy exchange of the internal airflow and the heat transfer between airflow and walls. Besides, a comparison of the CFD results and the experimental data is made to prove that the numerical simulation methods are reasonable and acceptable.

Large-Eddy Simulation of Reacting Turbulent Flows in Complex Geometries

2005 ◽  
Vol 73 (3) ◽  
pp. 374-381 ◽  
Author(s):  
K. Mahesh ◽  
G. Constantinescu ◽  
S. Apte ◽  
G. Iaccarino ◽  
F. Ham ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Turbulent Flows ◽  
Reacting Flows ◽  
Gas Turbine Combustor ◽  
Turbine Engine ◽  
Progress Variable ◽  
Eddy Simulation ◽  
Variable Approach ◽  
Large Eddy

Large-eddy simulation (LES) has traditionally been restricted to fairly simple geometries. This paper discusses LES of reacting flows in geometries as complex as commercial gas turbine engine combustors. The incompressible algorithm developed by Mahesh et al. (J. Comput. Phys., 2004, 197, 215–240) is extended to the zero Mach number equations with heat release. Chemical reactions are modeled using the flamelet/progress variable approach of Pierce and Moin (J. Fluid Mech., 2004, 504, 73–97). The simulations are validated against experiment for methane-air combustion in a coaxial geometry, and jet-A surrogate/air combustion in a gas-turbine combustor geometry.

Large Eddy Simulation of rich ammonia/hydrogen/air combustion in a gas turbine burner

2021 ◽  
Author(s):  
Kévin Bioche ◽  
Laurent Bricteux ◽  
Andrea Bertolino ◽  
Alessandro Parente ◽  
Julien Blondeau
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Gas Turbine Burner
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