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Keywords: Turbulent
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Journal Articles
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. 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
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...
Includes: Supplementary data
Journal Articles
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%. References [1] Konstantinoff , L...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2018, 140(9): 091503.
Paper No: GTP-17-1607
Published Online: May 24, 2018
... numbers ranging between 50,000 and 110,000 (with respect to the nozzle diameter, D N ); equivalence ratios between 0.55 and 0.78; and pilot fuel split ratios of 0 to 6%. Characterizing the impingement location on the liner, and the turbulent kinetic energy (TKE) distribution were a fundamental part...
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): 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): 051501.
Paper No: GTP-17-1396
Published Online: November 21, 2017
... the burner exit plane. Such behavior of FGM can be theoretically related to the finite rate closure used in Eq. (10) for the reaction progress equation. In fact, as already shown in Refs. [ 31 ] and [ 32 ], to properly determine the flame position, a turbulent flame speed closure for Y c -equation...
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
... techniques Sensors Swirling Thermoacoustics Thermodynamics Turbulence Turbulent Unsteady Unsteady flows Visualization Wave propagation Coupled behavior Combustion Avoidance of thermoacoustically driven pressure pulsations at screech level frequencies presents a considerable engineering...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 031503.
Paper No: GTP-17-1276
Published Online: October 17, 2017
... URBINES AND P OWER . Manuscript received July 4, 2017; final manuscript received July 18, 2017; published online October 17, 2017. Editor: David Wisler. 04 07 2017 18 07 2017 Aeronautical propulsion Combustion Droplet Experimental Sprays Swirling Thermoacoustics Turbulent Two...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 032601.
Paper No: GTP-17-1185
Published Online: October 17, 2017
... with the wall, film is formed accompanied by splashing creating a turbulent frothy flow. Subsequent oil film flow is a result of the tangential momentum that the droplets bring to the impact, the shear of the air on the oil, and the impact or splashing of subsequent droplets. Other forces include gravity...
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...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 011503.
Paper No: GTP-17-1315
Published Online: September 19, 2017
...Michael Stöhr; Kilian Oberleithner; Moritz Sieber; Zhiyao Yin; Wolfgang Meier Sudden changes of flame shape are an undesired, yet poorly understood feature of swirl combustors used in gas turbines. The present work studies flame shape transition mechanisms of a bistable turbulent swirl flame...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 012504.
Paper No: GTP-17-1266
Published Online: September 19, 2017
... OWER . Manuscript received July 3, 2017; final manuscript received July 4, 2017; published online September 19, 2017. Editor: David Wisler. 03 07 2017 04 07 2017 Computational fluid dynamics Turbulent Vibration Multiple stage centrifugal pumps comprise several impellers...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 011501.
Paper No: GTP-17-1182
Published Online: September 19, 2017
... Gas turbine technology Swirling Turbulent Visualization Aerospace Propulsion systems Currently, two approaches for UCC design are being investigated. Both approaches involve maintaining stable swirling flow in the primary combustion cavity to facilitate mixing and propagation...