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Keywords: Unsteady
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2024, 146(9): 091012.
Paper No: GTP-23-1689
Published Online: March 20, 2024
... and simulations possible, simplified geometry and boundary conditions are often used, for example, simulations of primary atomization often use a fixed film height and velocity. This paper aims to quantify the effect of a fully developed unsteady film on the atomization process. A custom Coupled Level Set...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2021, 143(11): 111004.
Paper No: GTP-21-1126
Published Online: September 27, 2021
... film cooling effect at M = 0.5. e-mail:  xinyan@mail.xjtu.edu.cn 29 03 2021 01 07 2021 27 09 2021 cutback land film cooling DDES unsteady National Natural Science Foundation of China 10.13039/501100001809 52076165 As the modern gas turbine...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2019, 141(1): 011005.
Paper No: GTP-18-1283
Published Online: September 14, 2018
..., an innovative calculation approach called the equalized timescales method (ET) was applied for the modeling of unsteady conjugate heat transfer (CHT). In the course of the research, the setup of the ET approach has been additionally investigated. Using the ET method, the mass flow rate and the rotational speed...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2019, 141(1): 011007.
Paper No: GTP-18-1287
Published Online: September 14, 2018
... Finite element Flow induced vibration Fuels Modeling Periodic Thermoacoustics Unsteady Unsteady flows Vibration Wave propagation Flow induced noise Combustion Can-annular combustors are common in heavy-duty land based gas turbines. In this design, the air flows from the compressor...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 112503.
Paper No: GTP-17-1220
Published Online: July 31, 2018
... Structural dynamics Unsteady Flow induced noise Nuclear turbine rotor operating on wet steam is facing intractable flow-induced vibration (FIV) problems, which might be exacerbated due to non-equilibrium condensation process of wet steam. The vibration responses of the rotor blade induced by non...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 111501.
Paper No: GTP-17-1435
Published Online: June 27, 2018
... to thermoacoustic instabilities. These self-sustained oscillations result from a positive coupling between sound pressure and unsteady heat release [ 1 ] when the combustor is operated under unfavorable conditions. As a result, this may lead to blowout of the flame, increased pollutant formation, or in the worst...
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
...Chirag Trivedi This work investigates the unsteady pressure fluctuations and inception of vortical flow in a hydraulic turbine during speed-no-load conditions. At speed-no-load (SNL), the available hydraulic energy dissipates to the blades without producing an effective torque. This results in high...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 081505.
Paper No: GTP-17-1611
Published Online: May 2, 2018
.... 09 11 2017 12 12 2017 Burners Combustion Combustors Experimental Flame Nonintrusive diagnostics Thermoacoustics Unsteady Unsteady flows Increasingly stringent pollutant emission regulations lead aircraft engine manufacturers to move away from traditional diffusion flame...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2018, 140(7): 071202.
Paper No: GTP-17-1621
Published Online: April 23, 2018
... Unsteady Control systems To address the challenge of modeling gas turbine (GT) start-up, white-box, gray-box, and black-box models can be considered as the main categories of system models. White-box models are usually used with coupled and dynamics equations, thermodynamic relations, energy...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 051505.
Paper No: GTP-17-1274
Published Online: December 19, 2017
... of a given unstable/stable operation point in terms of their distance from the Hopf bifurcation point occurs via the system growth/damping rates. The methodologies solely rely on dynamic measurement data (i.e., unsteady heat release and/or pressure recordings) while avoiding the need of any external...
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
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
... 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 challenge in the development of modern...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 032001.
Paper No: GTP-17-1358
Published Online: October 25, 2017
... Energy conversion Energy systems Power Unsteady Control systems Co- generation Nowadays, micro-CHP (combined heat and power) systems for residential and nonindustrial users are one of the most studied topics for energy production. In fact, an overview of CHP technologies is presented...
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
...-phase Unsteady Aerospace Propulsion systems A considerable research effort has concerned combustion dynamics issues with much of this work focused on problems raised by gas turbines. These machines operate in a lean premixed combustion mode to reduce NO x emissions, the flames are more...
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
..., 2017. Assoc. Editor: Klaus Brun. 30 05 2017 10 07 2017 Aeronautical propulsion Aerospace applications Design optimization Droplet Experimental Film Fluids Gas turbine technology Multiphase flows Separated Shear Flows Turbulent Two-phase Unsteady Aerospace Propulsion...
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
... Turbulent Two-phase Unsteady Unsteady flows Steam turbines, which account for a large part of the world power generation, in order to cope with the growth of the renewable energies share in the power generation mix, are required operational flexibility. This means that nowadays a considerable...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2018, 140(2): 021701.
Paper No: GTP-17-1319
Published Online: October 3, 2017
... AS T URBINES AND P OWER . Manuscript received July 7, 2017; final manuscript received July 11, 2017; published online October 3, 2017. Editor: David Wisler. 07 07 2017 11 07 2017 Energy systems Unsteady Vibration The development of advanced cycles based on gas turbine...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 012605.
Paper No: GTP-17-1306
Published Online: September 26, 2017
.... Furthermore, a loosely coupled procedure is developed to combine this enhanced flow solver with a solid conduction solver for solving unsteady conjugate heat transfer (CHT) problems for transient natural convection. This allows very large computational time-steps to be used without any stability issues...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2017, 139(12): 121501.
Paper No: GTP-17-1296
Published Online: August 16, 2017
.... , Hehle , M. , and Schäfer , O. , 2006 , “ Performance of Prefilming Airblast Atomizers in Unsteady Flow Conditions ,” ASME Paper No. GT2006-90432. 10.1115/GT2006-90432 [5] Gajan , P. , Strzelecki , A. , Platet , B. , Lecourt , R. , and Giuliani , F. , 2007...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2017, 139(11): 112601.
Paper No: GTP-16-1545
Published Online: July 19, 2017
... levels of cavity seal effectiveness. Unlike the double lip seal, the single lip seal is sensitive to overall Reynolds number, the addition of a simulated blade pressure field, and large-scale nonuniform ingestion. In the case of both seals, unsteady pressure variations attributed to shear layer...