Effects of mesh resolution on large eddy simulation of reacting flows in complex geometry combustors

2008 ◽  
Vol 155 (1-2) ◽  
pp. 196-214 ◽  
Author(s):  
G. Boudier ◽  
L.Y.M. Gicquel ◽  
T.J. Poinsot
Keyword(s):  
Large Eddy Simulation ◽  
Complex Geometry ◽  
Reacting Flows ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Mesh Resolution

Large-Eddy Simulation of Complex Geometry Jets

2012 ◽  
Vol 28 (2) ◽  
pp. 235-245 ◽  
Author(s):  
Simon Eastwood ◽  
Hao Xia ◽  
Paul G. Tucker
Keyword(s):  
Large Eddy Simulation ◽  
Complex Geometry ◽  
Eddy Simulation ◽  
Large Eddy

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.

An Assessment of the Implicit Non-Iterative PISO Solution Procedure for the Prediction of Combustor Performance

2019 ◽  
Author(s):  
Megan Karalus ◽  
Niveditha Krishnamoorthy ◽  
Bob Reynolds ◽  
George Mallouppas
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Solution Procedure ◽  
Reacting Flows ◽  
Small Time ◽  
Accurate Prediction ◽  
Simple Method ◽  
Performance Improvements ◽  
Eddy Simulation ◽  
Large Eddy

Abstract Large Eddy Simulation (LES) of gas turbine combustors has gained traction as a key tool in the design process. Accurate prediction of the multiphysics of reacting flows — evaporating fuel spray, turbulent mixing, turbulent chemistry interaction, radiation, and conjugate heat transfer to name a few — is key to the accurate prediction of combustor performance. The overall solution time for a standard LES simulation on an industrial system can be burdensome because of the small time and length scales required to capture the aforementioned multiphysics to an acceptable level. Any performance improvements are therefore welcomed. In this paper, we compare the implicit non-iterative PISO solution procedure with the implicit iterative SIMPLE method for the Large Eddy Simulation of a Honeywell combustor using the commercial software, Simcenter STAR-CCM+ v13.04. Time averaged simulation results are validated against rig data. Results show that the PISO solution method provides results which are similar to those found using the SIMPLE method, and accurate when compared to rig data, but at up to a 3.4X speed-up for this liquid fueled gas turbine combustor.

The Characteristics Research of Tube Vortex Based on Large Eddy Simulation

2011 ◽  
Vol 121-126 ◽  
pp. 3657-3661
Author(s):  
Dun Zhang ◽  
Yuan Zheng ◽  
Ying Zhao ◽  
Jian Jun Huang
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flow ◽  
Complex Geometry ◽  
Initial Conditions ◽  
Three Dimensional ◽  
Flow Simulation ◽  
Computational Method ◽  
Francis Turbine ◽  
Eddy Simulation ◽  
Large Eddy

Numerical simulation of three-dimensional transient turbulent flow in the whole flow passage of a Francis turbine were based upon the large eddy simulation(LES) technique on Smargorinsky model and sliding mesh technology. The steady flow data simulated with the standard k-εmodel was used as the initial conditions for the unsteady simulation. The results show that LES can do well transient turbulent flow simulation in a Francis turbine with complex geometry. The computational method provides some reference for exploring the mechanism of eddy formation in a complex turbulent of hydraulic machinery.

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