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Keywords: vortices
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2011, 133(10): 101501.
Published Online: April 25, 2011
... ). This type of flame flashback is caused by a strong interaction between the flame chemistry and vortex dynamics. The analysis of the vorticity transport equation shows that the axial gradient of the azimuthal vorticity is of particular importance for flame stability. A negative azimuthal vorticity gradient...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2011, 133(3): 031702.
Published Online: November 11, 2010
.... This investigation examines experimentally the effect of blowing ratio of fans in crossflow, and numerically, the effect of the swirl velocity of jets in crossflow, downstream of the injection hole. The experimental results indicated an agreement with typically straight jets in crossflow (no vorticity), illustrating...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2011, 133(2): 022504.
Published Online: October 29, 2010
...) stators turbomachinery vortices Fluid instabilities in hole-pattern and honeycomb stator seals have been extensively investigated in recent years ( 1 2 3 4 5 ). The results of this body of research indicate that rotor shaft vibrations are caused by cross-coupled forces between the rotor...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2010, 132(12): 121501.
Published Online: August 20, 2010
..., wrinkling flame with a blue annular film is observed because the excitation induces vortices in the central fuel jet and hence gives rise to the wrinkling of flame. The central jet vortices become larger with the increase in excitation amplitude and thus lead to a wider and shorter flame. If the excitation...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2010, 132(11): 111502.
Published Online: August 5, 2010
... of holes along the flame that are associated with local extinction. 08 05 2009 03 09 2009 05 08 2010 05 08 2010 carbon compounds flames hydrogen vortices swirling hydrogen lean blowout It appears that classical Damköhler number scalings based on average...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2010, 132(7): 071503.
Published Online: April 9, 2010
... 04 2010 flames swirling flow velocimeters vortices large eddy simulation thickened-flame swirl premixed combustion gas turbine unconfined configuration Land-based gas turbines operate primarily in a lean-premixed mode (LPM) with natural gas as the fuel of choice due...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2010, 132(4): 041503.
Published Online: January 27, 2010
... scale for PSR (s) τ t turbulent time scale (s) τ u characteristic flow time scale (s) ω vorticity vector (1/s) Fritz , J. , Kröner , M. , and Sattelmayer , T. , 2001 , “ Flashback in a Swirl Burner With Cylindrical Premixing Zone...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2010, 132(2): 021503.
Published Online: October 30, 2009
... nozzles time-varying systems vortices Industrial gas turbines are typically fueled with natural gas and/or syngas, and the fuel injection ports are usually not choked. Acoustic oscillations in a combustor introduce unsteady fuel and air flow rates into the burner, resulting in heat release rate...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2010, 132(2): 021501.
Published Online: October 15, 2009
... to the presence of vortices and shear layers around the liquid jet. The data presented here improve the understanding of spray formation processes, and provide benchmark data for computational fluid dynamics (CFD) code validation. 11 10 2007 01 02 2008 15 10 2009 computational fluid...
Topics: Drops, Sprays, Fuels
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2010, 132(1): 012901.
Published Online: September 29, 2009
... 10.1016/0029-5493(94)90343-3 , 146 , pp. 373 – 381 . Moriya , S. , 1998 , “ Experimental Study of Scale Effects on Onset Conditions of Gas Entrainment by Free Surface Vortices ,” Abiko Research Laboratory, Central Research Institute of Electric Power Industry, Report No. U97073...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. September 2009, 131(5): 054501.
Published Online: May 22, 2009
... from nonreacting vortices, a closed feedback loop was not possible. However, the periodic heat release due to the vortex shedding in reacting flows closed the loop. Bakrozis et al. ( 9 ) studied the turbulent structure of reacting diffusion flame over bluff bodies and showed that the combustion affects...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2009, 131(3): 031504.
Published Online: February 6, 2009
... positions. Then, the complete system hydrophone/burner was rotated by 180 deg allowing for an access to the second slot. Phase-averaged color maps of the azimuthal vorticity Ω (in s − 1 ) in the ( x b , z b ) -plane of the unforced flow, which evidences...
Topics: Flow (Dynamics)
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. September 2008, 130(5): 054505.
Published Online: July 1, 2008
... of FLUENT 6.2 with the detailed chemical reaction mechanism defined by GRI-MECH 3.0 and other mechanisms for the higher carbon species. The computed flow field of the multijet flame provides an extra intermediate vortex in addition to the two counter-rotating vortices observed for cases of the single...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. May 2008, 130(3): 034502.
Published Online: April 3, 2008
... the AVC approach an attractive alternative for syngas fuel applications. 26 06 2007 19 07 2007 03 04 2008 carbon compounds combustion gas turbines natural gas technology nitrogen compounds vortices The AVC concept is fundamentally different from conventional swirl...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2008, 130(2): 021503.
Published Online: January 22, 2008
... take on several forms, which have been shown in previous papers to include both a precessing vortex core (PVC) and the appearance of multiple helical vortices formed in the swirl stream shear layer. The unsteady dynamics of these particular features can play an important role in combustion induced...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2007, 129(4): 929–936.
Published Online: April 3, 2007
... in vortical flows, which propagates upstream into the mixing zone after the equivalence ratio has exceeded a critical value. This bubble then stabilizes the chemical reaction and causes overheat with subsequent damage to the combustion system. Although it was shown earlier that the sudden change...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2007, 129(2): 411–419.
Published Online: July 30, 2006
... were carried out in several selected planes under design operation conditions with simulated total pressure distribution and axial velocity profile. The mean flow fields revealed a complicated vortical flow structure and the major sources of energy loss. Vortices with different scales were observed...