On the interaction of the Darrieus–Landau instability with weak initial turbulence

2017 ◽  
Vol 36 (2) ◽  
pp. 2815-2822 ◽  
Author(s):  
C. Regis Bauwens ◽  
Jeffrey M. Bergthorson ◽  
Sergey B. Dorofeev
Keyword(s):  
Initial Turbulence ◽  
Landau Instability

Quantifying the role of Darrieus–Landau instability in turbulent premixed flame speed determination at various burner sizes

2021 ◽  
Vol 33 (2) ◽  
pp. 025104
Author(s):  
Xin Wang ◽  
Xiaobei Cheng ◽  
Hao Lu ◽  
Yishu Xu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Flame Speed ◽  
Premixed Flame ◽  
Turbulent Premixed Flame ◽  
Landau Instability ◽  
Turbulent Premixed

Effect of flow acceleration and initial turbulence level on velocity fluctuations

1994 ◽  
Vol 28 (5) ◽  
pp. 624-629 ◽  
Author(s):  
V. P. Lebedev ◽  
V. V. Lemanov ◽  
S. Ya. Misyura ◽  
V. I. Terekhov
Keyword(s):  
Turbulence Level ◽  
Velocity Fluctuations ◽  
Flow Acceleration ◽  
Initial Turbulence

Fractal flame structure due to the hydrodynamic Darrieus-Landau instability

2015 ◽  
Vol 92 (6) ◽  
Author(s):  
Rixin Yu ◽  
Xue-Song Bai ◽  
Vitaly Bychkov
Keyword(s):  
Flame Structure ◽  
Landau Instability

The Influence of the Exit Velocity Profile on the Noise of a Jet

1954 ◽  
Vol 4 (4) ◽  
pp. 341-360 ◽  
Author(s):  
Alan Powell
Keyword(s):  
Velocity Profile ◽  
Noise Level ◽  
Turbulent Pipe Flow ◽  
Aerodynamic Noise ◽  
Noise Levels ◽  
Flow Forming ◽  
Flow Velocity Profile ◽  
Jet Velocity ◽  
Initial Turbulence ◽  
Moving Fluid

SummaryThe noise levels of a jet issuing from a long pipe are compared with those of a jet having a square velocity profile at the exit. A subsonic noise reduction of between 2 and 5 decibels for various conditions is found for the case of the flow emerging with an approximately “turbulent pipe-flow” velocity profile for the same maximum jet velocity, but this is at the expense of a loss in thrust of a quarter. On comparison with a jet of smaller diameter which has an equal thrust for the same maximum jet velocity, it is found that the changes in noise level are rather smaller. For jets of equal diameters, the effects on the subsonic aerodynamic noise generated of a reduction of velocity gradient near the boundary are more than offset by the increased velocities necessary near the centre of the jet to obtain equal thrust. It is concluded that if the effect of differences in initial turbulence can be neglected the use of an auxiliary flow forming a comparatively thin sheath of slower moving fluid at the exit is not likely to result in large decreases in the subsonic noise level, and that a general reduction in jet velocity is more effective.Above the critical pressure larger reductions of up to 10 decibels are found. These are consistent with a delay of the onset of the self-maintained shock-produced noise.

Flame Induced Flow Features in the Presence of Darrieus-Landau Instability

2018 ◽  
Vol 101 (4) ◽  
pp. 1137-1155 ◽  
Author(s):  
Rachele Lamioni ◽  
Pasquale Eduardo Lapenna ◽  
Guido Troiani ◽  
Francesco Creta
Keyword(s):  
Flow Features ◽  
Induced Flow ◽  
Landau Instability

Combined Effect of Ignition Energy and Initial Turbulence on the Explosion Behavior of Lean Gas/Dust-Air Mixtures

2011 ◽  
Vol 51 (22) ◽  
pp. 7663-7670 ◽  
Author(s):  
Almerinda Di Benedetto ◽  
Anita Garcia-Agreda ◽  
Paola Russo ◽  
Roberto Sanchirico
Keyword(s):  
Combined Effect ◽  
Ignition Energy ◽  
Initial Turbulence

scholarly journals Experimental and numerical Lattice-Boltzmann investigation of the Darrieus–Landau instability

2020 ◽  
Vol 221 ◽  
pp. 103-109
Author(s):  
Muhammad Tayyab ◽  
Basile Radisson ◽  
Christophe Almarcha ◽  
Bruno Denet ◽  
Pierre Boivin
Keyword(s):  
Lattice Boltzmann ◽  
Landau Instability

scholarly journals Darrieus–Landau instability of premixed flames enhanced by fuel droplets

2017 ◽  
Vol 21 (4) ◽  
pp. 630-645 ◽  
Author(s):  
Colette Nicoli ◽  
Pierre Haldenwang ◽  
Bruno Denet
Keyword(s):  
Premixed Flames ◽  
Fuel Droplets ◽  
Landau Instability
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