... nozzles rotors stators swirling flow turbulence Subscripts ad = adiabatic atm = ambient coarse = results of the coarser mesh fine = results of the finer mesh h = at receiver hole radius i,j = indices for Cartesian coordinates in = values at inflow...

... chemically reactive flow combustion combustion equipment flames flow instability flow simulation gas turbines swirling flow turbulence In Figs. 6a and 6b we show contours of the vorticity magnitude | ω ̃ | = 1 2 | ∇ × v ̃ | and the heat-release Q...

... emissions. 10 12 2010 20 12 2010 14 12 2011 14 12 2011 combustion diesel engines fuel economy fuel systems heat losses heat transfer military vehicles nanoparticles petroleum smoke soot swirling flow JP-8 fuel has been gaining prominence ever since US Army...

...Stephan Burmberger; Thomas Sattelmayer A frequently employed method for aerodynamic flame stabilization in modern premixed low emission combustors is the breakdown of swirling flows; with carefully optimized tailoring of the swirler, a sudden transition in the flow field in the combustor can...

.... Furthermore, we have systematically measured the twisted-tape-induced swirl flow heat transfer due to exponentially increasing heat inputs with various exponential periods ( Q = Q 0   exp ( t / τ ) , τ = 7 , 14, and 23 s) and the twisted-tape-induced pressure drop with mass...

...-fuel ratio was decreased. 04 06 2009 07 01 2010 18 11 2010 18 11 2010 combustion computational fluid dynamics diesel engines flow simulation swirling flow torque valves CFD has gained acceptance as a tool for engine design and to evaluate changes to engine...

... 04 2010 19 04 2010 27 10 2010 27 10 2010 flames fluid oscillations gas turbines swirling flow Lean-premixed combustion has been successful in meeting current NO x emission regulations; however, this has been achieved at the expense of increased...

... coefficient are carried out near the premixer inlet using an IMD placed at L 2 = 20   cm from the injection plane inside the premixer (Fig. 1 ). This distance was chosen to avoid any hydrodynamic pressure perturbation from the swirling flow inside the premixer. Locations of the acoustic...

... Instabilities by Interaction of Acoustics and Unstable Swirling Flow ,” AIAA J. 0001-1452 , 38 ( 6 ), pp. 1025 – 1034 . 10.2514/2.1063 Moeck , J. P. , Bothien , M. R. , Guyot , D. , and Paschereit , C. O. , 2007 , “ Phase-Shift Control of Combustion Instability Using (Combined...

... model with enhanced wall treatment is employed to model turbulent swirl flow, whereas eddy break-up (EBU), presumed probability density function laminar flamelet model, and partially premixed coherent flame model (PCFM) are tried for reacting flow in the combustor. Independent simulations are carried...

... 1.3935 Impeller WFR f w 0.532 0.597 0.627 Seal WFR f w 0.551 0.645 0.678 12 06 2006 04 01 2007 17 06 2010 17 06 2010 rotors flow instability compressors impellers Mach number pistons compressible flow swirling flow flow simulation...

... combustion combustion equipment cooling Doppler measurement fuel systems gas turbines laser velocimetry swirling flow Lean premixed swirl stabilized combustion is successfully applied in gas turbine combustion systems to maintain low NO x and CO-emissions over a wide operating...

... of the hydrocarbon SCF jets was similar to that of CO 2 SCF jets. 24 07 2007 08 04 2008 18 05 2010 fuel jets nozzles sprays swirling flow supercritical injection supercritical jets supercritical swirling jets The aim of the current study was to extend recent SCF jet...

...Ashoke De; Shengrong Zhu; Sumanta Acharya An unconfined strongly swirled flow is investigated for different Reynolds numbers using particle image velocimetry (PIV) and large eddy simulation (LES) with a thickened-flame (TF) model. Both reacting and nonreacting flow results are presented. In the LES...

... aerodynamics combustion combustion equipment confined flow flames jets swirling flow transfer functions The stability of lean premixed combustion systems with regard to self-sustained combustion instabilities can be evaluated with a stability analysis using the acoustic network modeling approach...

... damage. flames swirling flow 09 04 2009 19 07 2009 18 03 2010 2010 American Society of Mechanical Engineers ...

... gas turbines heat transfer swirling flow turbulence The term “combustion instability” generally refers to the sustained high amplitude pressure fluctuations in a combustion chamber, resulting from the coupling between the system acoustics and the unsteady heat release. It is by nature...

.... Sci. 0360-1285 10.1016/j.pecs.2005.10.002 , 32 ( 2 ), pp. 93 – 161 . 24 07 2008 06 09 2008 05 06 2009 combustion flow control flow instability swirling flow turbulence perforated plate impedance passive control flame-acoustic interaction combustion...

... = 246   mm ). Some of the large droplets (droplet diameter d > 40   μ m ) remain at the center. This might be because the centrifugal force vanishes at r = 0 . PDA measurement was carried out for swirling flows. Though...

.... 29 06 2007 01 03 2008 22 08 2008 angular measurement nozzles sprays swirling flow pressure swirl cone angle nozzle pressure drop ambient pressure entrainment Recent advances in gas turbine engine technologies have allowed for the creation of larger, more...