Effect of the Wave Structure of the Flow in a Supersonic Combustor on Ignition and Flame Stabilization

2018 ◽  
Keyword(s):  
Wave Structure ◽  
Flame Stabilization

Effect of the Wave Structure of the Flow in a Supersonic Combustor on Ignition and Flame Stabilization

2018 ◽  
Vol 54 (6) ◽  
pp. 629-641 ◽  
Author(s):  
M. A. Goldfeld ◽  
Yu. V. Zakharova ◽  
A. V. Fedorov ◽  
N. N. Fedorova
Keyword(s):  
Wave Structure ◽  
Flame Stabilization

STUDY OF THE HEAD ON DETONATION WAVE STRUCTURE IN GASEOUS EXPLOSIVES

1987 ◽  
Vol 48 (C4) ◽  
pp. C4-119-C4-124
Author(s):  
H. N. PRESLES ◽  
P. BAUER ◽  
C. GUERRAUD ◽  
D. DESBORDES
Keyword(s):  
Detonation Wave ◽  
Wave Structure

SHEAR LAYER AND WAVE STRUCTURE OVER PARTIALLY SPANNING CAVITIES

2013 ◽  
Vol 20 (1-2) ◽  
pp. 111-123
Author(s):  
Rajarshi Das ◽  
Heuy Dong Kim ◽  
Job Kurian
Keyword(s):  
Shear Layer ◽  
Wave Structure

Countercurrent shear layer control of flame stabilization

1997 ◽  
Author(s):  
E. Koc-Alkislar ◽  
L. Lourenco ◽  
A. Krothapalli ◽  
P. Strykowski ◽  
E. Koc-Alkislar ◽  
...  
Keyword(s):  
Shear Layer ◽  
Flame Stabilization ◽  
Countercurrent Shear ◽  
Layer Control

scholarly journals Review of smoothed particle hydrodynamics: towards converged Lagrangian flow modelling

2020 ◽  
Vol 476 (2241) ◽  
pp. 20190801
Author(s):  
Steven J. Lind ◽  
Benedict D. Rogers ◽  
Peter K. Stansby
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Graphics Processing Units ◽  
Wave Structure ◽  
Free Form ◽  
Mesh Free ◽  
Weakly Compressible ◽  
Particle Hydrodynamics ◽  
Massively Parallel Computing ◽  
Smoothed Particle ◽  
Graphics Processing

This paper presents a review of the progress of smoothed particle hydrodynamics (SPH) towards high-order converged simulations. As a mesh-free Lagrangian method suitable for complex flows with interfaces and multiple phases, SPH has developed considerably in the past decade. While original applications were in astrophysics, early engineering applications showed the versatility and robustness of the method without emphasis on accuracy and convergence. The early method was of weakly compressible form resulting in noisy pressures due to spurious pressure waves. This was effectively removed in the incompressible (divergence-free) form which followed; since then the weakly compressible form has been advanced, reducing pressure noise. Now numerical convergence studies are standard. While the method is computationally demanding on conventional processors, it is well suited to parallel processing on massively parallel computing and graphics processing units. Applications are diverse and encompass wave–structure interaction, geophysical flows due to landslides, nuclear sludge flows, welding, gearbox flows and many others. In the state of the art, convergence is typically between the first- and second-order theoretical limits. Recent advances are improving convergence to fourth order (and higher) and these will also be outlined. This can be necessary to resolve multi-scale aspects of turbulent flow.

scholarly journals Observation of a comb-shaped filamentary plasma array under subcritical condition in 303-GHz millimetre-wave air discharge

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Masafumi Fukunari ◽  
Shunsuke Tanaka ◽  
Ryuji Shinbayashi ◽  
Yuusuke Yamaguchi ◽  
Yoshinori Tatematsu ◽  
...  
Keyword(s):  
Electric Field ◽  
Focal Point ◽  
Incident Beam ◽  
Wave Structure ◽  
Field Vector ◽  
Interesting Phenomenon ◽  
Millimetre Wave ◽  
Field Plane ◽  
Subcritical Condition ◽  
Air Discharge

AbstractGas breakdown in the millimetre-wave frequency band is an interesting phenomenon in nonlinear dynamics such as self-organized structure formation. We observed the transition between two types of filamentary plasma arrays in air discharge driven by a 303-GHz millimetre wave. Plasma is ignited at a parabolic mirror’s focal point in the overcritical condition. One array parallel to the electric field vector appears with a spacing of λ/4 at the focal point. Filaments then separate into plasma lumps ~10 μs after ignition. At 20 μs, a new comb-shaped array grows in the subcritical condition. Filaments are parallel to the incident beam with spacing of 0.96 λ and elongate towards the incident beam. This comb-shaped array appears only in the electric field plane; bulk plasma with a sharp vertex forms in the magnetic field plane. This array is created by a standing wave structure generated by waves diffracted from the plasma surface. Filamentary plasma array formations can influence the energy absorption by the plasma, which is important for engineering applications such as beamed energy propulsion.

Flame stabilization in the wake flow behind a slit V-gutter

1994 ◽  
Vol 99 (2) ◽  
pp. 288-294 ◽  
Author(s):  
Jing-Tang Yang ◽  
Chang-Wu Yen ◽  
Go-Long Tsai
Keyword(s):  
Flame Stabilization ◽  
Wake Flow
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