An experimental study of combustion dynamics of a premixed swirl injector

Broda, J.; Seo, Seok Bin; Santoro, Robert J.; Shirhattikar, G.; Yang, Vigor

doi:10.1016/s0082-0784(98)80027-1

Cited by 161 publications

(74 citation statements)

References 9 publications

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“…These experiments, conducted with natural gas as the fuel, utilized an Annular Counter Rotating Swirl (DACRS) injector designed and fabricated by General Electric Aircraft Engines. The experimental results, detailed in this report for the DACRS injector, complement earlier work for a Penn State designed swirl injector [3,4] conducted under separate funding from the U.S. Department of Energy, Federal Energy…”

Section: Combustion Instability Studies Applicable To Coal-based supporting

confidence: 62%

“…In addition to the combustion instability research involving the DACRS injector, the experimental definition for a trapped vortex combustor is also presented. In the area of analysis, complementary CFD analyses of the combustion instability phenomenon for the Penn State injector [3,4] are presented and discussed…”

Section: Combustion Instability Studies Applicable To Coal-based mentioning

confidence: 99%

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Subsonic Aircraft Noise At and Beneath the Ocean Surface: Estimation of Risk for Effects on Marine Mammals

Eller¹,

Cavanagh²

2000

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Combustion studies were conducted to evaluate the suitability of using a coal-derived aviation fuel as a candidate JP-900 (i.e. a aviation fuel having maximum temperature capability of 482C (900F). Specific progress made for the four tasks constituting Delivery Order 4 is described here. These tasks are 1) combustion Studies of Coal-Based JP-900 at High Temperature and High Pressure Conditions, 2) Combustion Instability Studies Applicable to Coal-Based JP-900, 3) Pulse Detonation Engine Studies Using Coal-Based JP-900, and 4) Coal Derived Fuel Combustion Studies of an Advanced Gas Turbine Engine Fuel System.

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Section: Combustion Instability Studies Applicable To Coal-based supporting

confidence: 62%

Section: Combustion Instability Studies Applicable To Coal-based mentioning

confidence: 99%

Subsonic Aircraft Noise At and Beneath the Ocean Surface: Estimation of Risk for Effects on Marine Mammals

Eller¹,

Cavanagh²

2000

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“…To obtain important factors for control of combustion oscillations, quantitative measurements of the flame response to acoustic perturbations have been conducted by Poinsot et al (3) and Harper et al (4) . Flame-acoustic interactions in unstable combustors have been investigated by Samaniego et al (5) , Broda et al (6) and Balachandran et al (7) using phase-locked measurements. In general, these results show the significant influence of the combustor geometry or acoustic properties of the combustion system on the unstable phenomena.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Vortical Motion and Pressure Fluctuation in Noise-Controlled, Swirl-Stabilized Combustor

Shimura

Tanahashi

Choi

et al. 2009

JTST

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To clarify the mechanisms of combustion oscillation, combustion noise and their suppression by secondary fuel injection, simultaneous measurements of stereoscopic particle image velocimetry (SPIV) and pressure fluctuation in combustion chamber were conducted on several planes of a swirl-stabilized turbulent premixed flame for no control case and noise-controlled case by continuous secondary fuel injection. Velocities measured by SPIV were averaged in 8 phases of the pressure fluctuation and streamlines were obtained from the phase-averaged velocities. For no control case, large-scale vortical structures are generated in regions around the axial centerline of the combustor and outer edge of the swirl nozzle in the phase of low pressure. With increasing pressure, they move near the contour surface of mean progress variablec = 0.5 which have been obtained in the previous study. These large-scale vortical motions induce fluctuation of flame front and enhance entropy term in the acoustic sound source. The secondary fuel injection suppresses the velocity fluctuation in the inner recirculation zone, resulting in reduction of combustion noise. These results show that control of the large-scale vortical motion is important for reduction of combustion noise.

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“…For example, Syred and Beér have researched the combustion in swirling flows in order to underline that there is sufficient information to indicate that stratified or staged fuel or air entry may be used to minimize noise, hydrocarbon, and most importantly NOx emissions from swirl combustors [7]. Furthermore, there were papers who further researched the burner systems in regards to energy, combustion and flame and heat transfer and NOx emissions [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Influence of swirl and tumble motion inside the combustion chamber of a compression ignited engine on vertices formation

2018

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Abstract. In modern compression ignited engines, one of the key innovative directions is optimization of the burn process especially to reduce emissions. This optimization can be done by ensuring a better air-fuel mixture. To answer this problem, in the current paper, the authors analysed the vertices formation and velocity inside the combustion chamber in thirteen cases, by using numerical analysis (AVL FIRE Software), to generate pure tumble motion, pure swirl motion, no in-cylinder motion of the air, and other combinations on tumble and swirl motion. The cases that were chosen combine 0%, 50%, 70% and 100% tumble and swirl motion. The greatest velocity of the in-cylinder air motion was noted when a 100%tumble and 50% swirl motion was induced (77.2 m/s at 736 degrees CA), while the smallest velocity was noted at 100% swirl and 0% tumble (71.07 m/s at 736 degrees CA). Because of the different induced motions, the vertices that form inside the combustion chamber have a great influence on air-fuel mixture and implicitly on emissions.

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An experimental study of combustion dynamics of a premixed swirl injector

Cited by 161 publications

References 9 publications

Subsonic Aircraft Noise At and Beneath the Ocean Surface: Estimation of Risk for Effects on Marine Mammals

Subsonic Aircraft Noise At and Beneath the Ocean Surface: Estimation of Risk for Effects on Marine Mammals

Large-Scale Vortical Motion and Pressure Fluctuation in Noise-Controlled, Swirl-Stabilized Combustor

Influence of swirl and tumble motion inside the combustion chamber of a compression ignited engine on vertices formation

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