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Keywords: thermoacoustics
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Journal Articles
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
... on the thermoacoustic frequencies of the combustor. We show how this communication gives rise to axial and azimuthal modes, and that these correspond to particularly synchronized states of axial thermoacoustic oscillations in each individual can. We show that these combustors typically show clusters of thermoacoustic...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2018, 140(12): 121502.
Paper No: GTP-18-1142
Published Online: August 6, 2018
... Experimental Flame Modeling Thermoacoustics Pilot flames have been traditionally used for improving the lean blowout limits of the gas turbine combustors [ 1 – 10 ]. Effects of pilot flames on improving the static stability have been extensively studied and well understood, with literatures...
Topics: Flames
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 112602.
Paper No: GTP-17-1427
Published Online: July 5, 2018
.... Comput. Phys. , 283 , pp. 312 – 328 . 10.1016/j.jcp.2014.12.010 [33] Giauque , A. , Huet , M. , Clero , F. , Ducruix , S. , and Richecoeur , F. , 2013 , “ Thermoacoustic Shape Optimization of a Subsonic Nozzle ,” ASME J. Eng. Gas Turbines Power , 135 (10), p. 102601...
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
... in a combustor where a turbulent flame acts as a thermoacoustic driver. In the proposed approach, the unfiltered pressure signal including several modes is analyzed by an algorithm based on Bayesian statistics. For this purpose, a Gibbs sampler is used to calculate parameters like damping rates...
Journal Articles
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. August 2018, 140(8): 082604.
Paper No: GTP-17-1458
Published Online: May 4, 2018
... manuscript received September 21, 2017; published online May 4, 2018. Editor: David Wisler. 16 08 2017 21 09 2017 Acoustic emission Combustion Thermoacoustics Combustion noise is at the heart of several efforts to reduce aircraft emissions. First, as large reductions in jet...
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
... thermo-acoustic instability at 500 Hz with an associated flame motion completely similar to the previous one. The rotational motions can no longer be detected in the flame behavior, probably because of the high amplitude fluctuations induced by the thermoacoustic instability. Using Hilbert transform...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2018, 140(6): 061505.
Paper No: GTP-17-1050
Published Online: January 30, 2018
... of each method, validation is made with the available measured data for the pressure and vibration signals, showing that the thermoacoustic instabilities are well predicted using the CHT and two-way coupled approaches, while the zero-way interaction model prediction gives the largest discrepancy from...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2018, 140(6): 061504.
Paper No: GTP-17-1450
Published Online: January 17, 2018
...D. Ebi; A. Denisov; G. Bonciolini; E. Boujo; N. Noiray We report experimental evidence of thermoacoustic bistability in a lab-scale turbulent combustor over a well-defined range of fuel–air equivalence ratios. Pressure oscillations are characterized by an intermittent behavior with “bursts,” i.e...
Journal Articles
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
...Tobias Hummel; Frederik Berger; Nicolai Stadlmair; Bruno Schuermans; Thomas Sattelmayer This paper presents a set of methodologies for the extraction of linear growth and damping rates associated with transversal eigenmodes at screech level frequencies in thermoacoustically noncompact gas turbine...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 051502.
Paper No: GTP-17-1438
Published Online: November 21, 2017
...Vera Hoferichter; Thomas Sattelmayer Lean premixed combustion is prevailing in gas turbines to minimize nitrogen oxide emissions. However, this technology bears the risk of flame flashback and thermoacoustic instabilities. Thermoacoustic instabilities induce velocity oscillations at the burner exit...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2018, 140(4): 041510.
Paper No: GTP-17-1407
Published Online: November 7, 2017
... length and velocity scales of a turbulent flame change with bulk flow velocity. A simple relation that predicts how ITA resonance frequencies should increase with bulk flow velocity compares well with experimental results. Convection Flame Swirling Thermoacoustics Stricter emission...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2018, 140(4): 041501.
Paper No: GTP-17-1249
Published Online: October 31, 2017
... and acoustics, which lead under certain conditions to thermoacoustic instabilities [ 30 ]. These coupling effects can be described in terms of a flame transfer function, which is, however, not available from experimental measurements or LES computations. Consequently the different contributions in the spectrum...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 031506.
Paper No: GTP-17-1354
Published Online: October 25, 2017
... dynamics Convection Engines Flame Modeling Swirling Thermoacoustics Unsteady flows Wave propagation Coupled behavior Combustion instabilities (CI) are a serious concern in the design process of aeronautical engines. They are still hard to predict and, as a consequence, generally appear...
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): 031504.
Paper No: GTP-17-1310
Published Online: October 17, 2017
.... Editor: David Wisler. 06 07 2017 26 07 2017 Combustion Combustors Experimental Flame Thermoacoustics Lean-premixed gas turbines used for power generation purposes are prone to combustion instabilities caused by their design and operation [ 1 ]. These instabilities...
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
... (SPOD). The results show that the transitions are governed by two types of instability, namely a hydrodynamic instability in the form of a precessing vortex core (PVC) and a thermoacoustic (TA) instability. The LSA shows that the V-M transition implies the transient formation of a PVC as the result...