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Keywords: LES
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Proceedings Papers

Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T03A012, June 13–17, 2022
Paper No: GT2022-82583
... stability, peak temperature, pollutants, etc., without affecting the hardware. Thus, helping in reducing the overall cost and time spent deciding the allowable blend ratios. In this work, the accuracy and consistency of Flamelet Generated Manifold (FGM) with Large Eddy Simulation (LES) have been assessed...
Proceedings Papers

Proc. ASME. GT2022, Volume 3B: Combustion, Fuels, and Emissions, V03BT04A026, June 13–17, 2022
Paper No: GT2022-82601
... computations are done with Finite Rate Chemistry (FRC) and Large Eddy Simulations (LES). Simulations are carried out for a varied percentage of CH 4 /H 2 blends, ranging from 0% H 2 to 100% H 2 at a fixed equivalence ratio and inlet mass flow. As the percentage of H 2 is increased in the fuel, flame speed...
Proceedings Papers

Proc. ASME. GT2022, Volume 3B: Combustion, Fuels, and Emissions, V03BT04A042, June 13–17, 2022
Paper No: GT2022-83025
... chemiluminescence distributions showed that the unsteady LES model can predict the micromix flame more accurately regarding to its ignition point than the steady RANS model, although the reaction progress is underestimated by both models, which in comparison to the experiment results in a more stretched flame...
Proceedings Papers

Proc. ASME. GT2022, Volume 11: Wind Energy, V011T38A007, June 13–17, 2022
Paper No: GT2022-81910
... Abstract The effect of surface roughness on spatially developing transitional flow field is discussed in the present study by carrying out highly resolved Large Eddy Simulations (LES). The surface modification considered here is the two-dimensional rectangular ribs embedded in the flat plate...
Topics: Flow (Dynamics)
Proceedings Papers

Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A028, June 7–11, 2021
Paper No: GT2021-59186
...-state simulations early in the design process can be a major lever in Reynolds Averaged Navier-Stokes (RANS) simulations are our efforts towards ever-more efficient engines. proven inadequate. Unsteady techniques such as Unsteady RANS (URANS) and Large Eddy Simulation (LES) can provide Nowadays, final...
Proceedings Papers

Proc. ASME. GT2021, Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V02CT34A005, June 7–11, 2021
Paper No: GT2021-58711
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-58711 GPU-ENABLED HIGH-FIDELITY LES SIMULATIONS FOR TURBOMACHINERY FLOWS Michal Osusky* Greg Sluyter Sriram Shankaran Rathakrishnan Bhaskaran GE Aviation Dheeraj...
Proceedings Papers

Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A002, September 21–25, 2020
Paper No: GT2020-14196
...; impingement cooling; LES; flow visualization; heat transfer NOMENCLATURE d diameter of jet (mm) f frequency (Hz) H jet-to-plate distance (mm) LES Large Eddy Simulations RANS Reynolds -averaged Navier-Stokes equations Re Reynolds number S Strain tensor s jet-to-jet distance (mm) St Strouhal number U center...
Proceedings Papers

Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT11A001, September 21–25, 2020
Paper No: GT2020-14186
... advanced numerical methodologies such as Scale-Adaptive Simulations of the integrated combustor- turbine domain. Keywords: Gas turbine, Combustor, Turbine, Interaction, Swirling flow, CFD, RANS, LES, Experiments, PSP. NOMENCLATURE Ma Mach number p Pitch [mm] P Pressure [Pa] Re Reynolds number sw Swirl...
Proceedings Papers

Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A027, September 21–25, 2020
Paper No: GT2020-14998
... instability perturbations. This investigation on the main non-reacting swirling flow structures inside the combustor provides a suitable background for further studies on combustion instability mechanisms. swirling flow LES PVC FFT DMD SPECTRAL ANALYSIS OF AN AERONAUTICAL LEAN DIRECT INJECTION...
Proceedings Papers

Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A030, September 21–25, 2020
Paper No: GT2020-15157
... simulations will be illustrated by several computational examples of practical interest. Keywords: Averaging, LES, Single passage, Multi-passages. NOMENCLATURE S Source term vector with 5 elements; St Source term for time-averaging (Reynolds-averaging); Sst Source term for space-time averaging; U Flow...
Proceedings Papers

Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A001, September 21–25, 2020
Paper No: GT2020-14115
...-element aerofoils to enhance take-off and landing performance. Further, multi- element aerofoil configurations have been shown to improve the aerodynamic characteristics of wind turbines. In the present study, high resolution Large Eddy Simulation (LES) is used to explore the low Reynolds Number (Re=0.832...
Proceedings Papers

Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT33A033, September 21–25, 2020
Paper No: GT2020-16256
...: LES; round jet; shock wave boundary-layer interaction; separation bubble; flow unsteadiness NOMENCLATURE 1 Inlet metal angle 2 Exit metal angle Stagger angle S Pitch C Blade chord Cax Blade axial chord x Axial location * Boundary layer displacement thickness Boundary layer momentum thickness H12...
Proceedings Papers

Proc. ASME. GT2020, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A049, September 21–25, 2020
Paper No: GT2020-16105
... which leads to either over- or under-prediction of chemical reaction rate depending on the experimental flame positions. Distributed flame front is clearly identified with LES for wet methane combustion associated with 35% steam-to-air ratio corresponding to a high Karlovitz number flame. Slightly...
Proceedings Papers

Proc. ASME. GT2020, Volume 1: Aircraft Engine; Fans and Blowers, V001T10A009, September 21–25, 2020
Paper No: GT2020-15338
...MACHINE LEARNT SYNTHETIC TURBULENCE FOR LES INFLOW CONDITIONS Alessandro Corsini1, Giovanni Delibra1, Marco Giovannelli1, Stefania Traldi1 1Department of Mechanical and Aerospace Engineering Sapienza University of Rome, Italy ABSTRACT LES computations have limited applications in turbomachinery...
Proceedings Papers

Proc. ASME. GT2020, Volume 2A: Turbomachinery, V02AT32A002, September 21–25, 2020
Paper No: GT2020-14192
...Abstract Abstract A large-eddy simulation (LES) is employed here to predict the flow field over the suction surface of a controlled-diffusion (C-D) compressor stator blade following the experiment of Hobson et al. [1]. When compared with the experiment, LES depicts a separation bubble (SB...
Proceedings Papers

Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A016, June 17–21, 2019
Paper No: GT2019-91206
... turbine. In this work high-fidelity Large Eddy Simulation (LES) of combustor and complete high-pressure turbine are discussed and validated against experimental data. Measurement data is available on P40 (exit of the combustion chamber), P41 (exit of the stator) and P42 (exit of the rotor) and generally...
Proceedings Papers

Proc. ASME. GT2012, Volume 2: Combustion, Fuels and Emissions, Parts A and B, 579-588, June 11–15, 2012
Paper No: GT2012-68796
... to the unit impulse response of the flame. The impact of the differences in FTF on stability limits is analyzed with a low-order thermoacoustic model. Flame Dynamics LES Confinement thermal boundary conditions LES-BASED STUDY OF THE INFLUENCE OF THERMAL BOUNDARY CONDITION AND COMBUSTOR CONFINEMENT...
Proceedings Papers

Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 1645-1656, June 6–10, 2011
Paper No: GT2011-46057
... 07 05 2012 The unsteady flow physics and heat transfer characteristics due to interactions of periodic passing wakes with a separated boundary layer are studied with the help of Large-eddy simulations (LES). A flat plate with a semicircular leading edge is employed to obtain...
Proceedings Papers

Proc. ASME. GT2009, Volume 3: Heat Transfer, Parts A and B, 1173-1181, June 8–12, 2009
Paper No: GT2009-59428
... of cavities, while the LES is more advanced from an iew. Moreover, the unsteady RANS method is most for industry. It should be valuable in the detailed utations for selecting the optimized design. S g cavity, buoyancy, unsteady, LES, RANS ATURE ] temperature ] temperature of the wall ] temperature...
Proceedings Papers

Proc. ASME. GT2004, Volume 1: Turbo Expo 2004, 623-633, June 14–17, 2004
Paper No: GT2004-53967
... by ASME ent LES modeling approach can reproduce this variation rately. However, it understated the recirculation zone th at the stoichiometric condition. The approach was ssed at the lean blow out (LBO) condition to evaluate its avior at the lean limit and to analyze the physics of bustion instability...