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1-20 of 163
Keywords: turbulence
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2025, 147(1): 011026.
Paper No: GTP-24-1407
Published Online: October 25, 2024
...Ali Haghiri; Xiaowei Xu; Richard D. Sandberg; Koichi Tanimoto; Takuo Oda This study presents data-driven modeling of the Reynolds stress tensor and turbulent heat flux vector for improving unsteady Reynolds-averaged Navier–Stokes (RANS) predictions of natural convection problems. While RANS-based...
Journal Articles
Daniel Pugh, Phil Bowen, Rukshan Navaratne, Burak Goktepe, Anthony Giles, Agustin Valera Medina, Steven Morris, Robin Vivoli
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2024, 146(6): 061006.
Paper No: GTP-23-1411
Published Online: January 4, 2024
... , “
Effect of Swirl Number on Combustion Characteristics in a Natural Gas Diffusion Flame ,” ASME J. Energy Res. Technol. ,
135 ( 4 ), p. 042204 . 10.1115/1.4024222 [5]
Oh ,
J.
,
Hwang ,
J.
, and
Yoon ,
Y.
, 2010 , “
EINOx Scaling in a Non-Premixed Turbulent Hydrogen Jet...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2019, 141(8): 081004.
Paper No: GTP-18-1167
Published Online: February 15, 2019
... to decompose the results. The computed flow fields were divided into four reconstructed parts, namely mean part, coherent part, transition part, and turbulent part. Then, the dynamic mode decomposition (DMD) algorithm was used to analyze the characteristics of the reconstructed fields. The results show...
Journal Articles
Christopher Douglas, Jamie Lim, Travis Smith, Benjamin Emerson, Timothy Lieuwen, Naibo Jiang, Christopher Fugger, Tongxun Yi, Josef Felver, Sukesh Roy, James Gord
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2019, 141(1): 011001.
Paper No: GTP-18-1303
Published Online: August 31, 2018
... oscillations in Reynolds stress associated with the convection of periodic vortical structures. This result has important implications on hydrodynamic stability models and reduced-order computational fluid dynamics simulations, which do show the importance of turbulent transport on the problem, but do...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2018, 140(12): 121506.
Paper No: GTP-18-1091
Published Online: August 20, 2018
.... The convective wall heat loss is modeled through introducing a source term in the conditionally filtered total enthalpy equation for the CMC cells adjacent to the wall. The mean heat flux is high on the middle surface of the bluff body, but relatively low near its edges. The turbulent heat flux based...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2018, 140(12): 121503.
Paper No: GTP-17-1560
Published Online: August 20, 2018
...J. A. Piehl; O. Samimi Abianeh; A. Goyal; L. Bravo Turbulent spray combustion of n -dodecane was modeled at relevant engine conditions using two combustion models (direct integration of chemistry (DIC) and flamelet generated manifolds (FGM)) and multifidelity turbulence models (dynamic structure...
Journal Articles
Large Eddy Simulation of a Pressurized, Partially Premixed Swirling Flame With Finite-Rate Chemistry
Sandeep Jella, Pierre Gauthier, Gilles Bourque, Jeffrey Bergthorson, Ghenadie Bulat, Jim Rogerson, Suresh Sadasivuni
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 111505.
Paper No: GTP-17-1387
Published Online: July 10, 2018
..., the instantaneous flame location can vary in thickness and location due to heat losses or imperfect mixing. Postflame phenomena (slow CO oxidation or thermal NO production) can be expected to be significantly influenced by turbulent eddy structures. Since typical gas turbine combustor calculations require insight...
Journal Articles
Timo Buschhagen, Rohan Gejji, John Philo, Lucky Tran, J. Enrique Portillo Bilbao, Carson D. Slabaugh
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 111503.
Paper No: GTP-17-1648
Published Online: June 27, 2018
... Gas turbine technology Thermoacoustics Turbulence Unsteady flows The multiscale nature of combustion dynamics and their coupling mechanisms makes the experimental investigation of the phenomena challenging. High thermal power density flames present in gas turbine combustors are naturally...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 112601.
Paper No: GTP-17-1369
Published Online: June 27, 2018
...), whereas the flow on the blade pressure side close to the band was accelerating (turbine) and directed toward the outlet. Flow separation from the blade leading edge created a vortical flow, which broke up into four parts as it traveled further downstream and created high-energy turbulent eddies...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. October 2018, 140(10): 104501.
Paper No: GTP-17-1495
Published Online: June 25, 2018
... zone (TRZ). The Damkohler (Da) number in the reactor is the highest in the stabilization vortex; it varies from about Da ∼ 2 at ϕ = 0.55 to Da ∼ 0.2–0.3 at LBO conditions. Due to the reduced turbulent dissipation rate in PRZ, the Da number is an order of magnitude higher than in TRZ. The global blowout...
Topics:
Combustion,
Computational fluid dynamics,
Flames,
Flow (Dynamics),
Fuels,
Modeling,
Turbulence,
Vortices,
Combustion chambers,
Combustion systems
Includes: Supplementary data
Journal Articles
Lucas Konstantinoff, Lukas Möltner, Martin Pillei, Thomas Steiner, Thomas Dornauer, Günther Herdin, Dominik Mairegger
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2018, 140(10): 102805.
Paper No: GTP-18-1106
Published Online: June 19, 2018
... motion results in a faster combustion, hence in a higher efficiency. In summary, the geometrical modifications close to the valve seat result in increased turbulence intensity. It was proven that this intensification raises the ratio of efficiency by 1.6%. 1 Corresponding author. Contributed...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 082606.
Paper No: GTP-17-1545
Published Online: May 14, 2018
... velocity profiles show that, as flow develops axially, the vortex present in the profile migrates clockwise, opposite to the rotation of the fan, and toward the spinner of the engine. The turbulent stresses indicate that the center of the vortex meanders around a preferred location, which tightens as flow...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 082505.
Paper No: GTP-17-1614
Published Online: April 26, 2018
...-adverse operations have made water-lubricated bearings increasingly popular. Due to different viscosity properties between oil and water, the low viscosity of water increases Reynolds numbers drastically and therefore makes water-lubricated bearings prone to turbulence effects. The turbulence model...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 081502.
Paper No: GTP-17-1476
Published Online: April 18, 2018
.... It is then shown that the axial velocity field produced by the axial-plus-tangential swirler is different from those produced by purely axial or radial devices. It takes here a W-shape profile with three local maxima and two minima. The mean turbulent flame front also takes this W-shape in an axial plane, with two...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 051506.
Paper No: GTP-17-1409
Published Online: January 10, 2018
... OWER . Manuscript received July 28, 2017; final manuscript received August 22, 2017; published online January 10, 2018. Editor: David Wisler. 28 07 2017 22 08 2017 In recent years, linear stability analysis (LSA) of turbulent flows has been established as a well suited method...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 051501.
Paper No: GTP-17-1396
Published Online: November 21, 2017
... Wisler. 26 07 2017 09 08 2017 Aeronautical propulsion Aerothermodynamics Combustion Combustors Computational fluid dynamics Engines Flame Fuel combustion Fuels Gas turbine technology Modeling Multiphase flows Sprays Swirling Turbulence Turbulent Two-phase Unsteady...
Journal Articles
Patrick Buchwald, Damian M. Vogt, Julien Grilliat, Wolfgang Laufer, Michael B. Schmitz, Andreas Lucius, Marc Schneider
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 052601.
Paper No: GTP-17-1262
Published Online: November 14, 2017
... the rotor leading edge and impinging on the pressure side as well as the turbulent boundary layer on the suction side represent significant noise sources. In the present investigation, the maximum in efficiency coincides with the minimum in noise emissions. The blade profiles are constructed on 50...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2018, 140(4): 041507.
Paper No: GTP-17-1257
Published Online: November 7, 2017
... The acoustic amplitude is then modulated due to stochastic forcing effects from turbulent combustion noise. 2 c.c. denotes the complex conjugate counterparts of the equations two terms. 3 In the remaining sections, the acoustic pressure signal is normalized with pref = 19,000 Pa for simplified...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 032602.
Paper No: GTP-17-1189
Published Online: October 17, 2017
..., 2017; final manuscript received July 25, 2017; published online October 17, 2017. Editor: David Wisler. 01 06 2017 25 07 2017 Aerodynamics Computational Computational fluid dynamics Condensation Droplet Film Modeling Multiphase flows Phase change Turbines Turbulence...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2018, 140(2): 021502.
Paper No: GTP-17-1316
Published Online: October 3, 2017
... between the ignition probability field and the airflow turbulent kinetic energy and velocity fields. Local equivalence ratio enhances the importance of the ORZ. Once a successful ignition is accomplished on one injector, the injector-to-injector flame propagation must be examined. High-speed visualization...
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