Problem of Using the PIV-Method for Measurements in Thin High-Velocity Shear Layers

2020 ◽  
Keyword(s):  
High Velocity ◽  
Shear Layers ◽  
Velocity Shear ◽  
Piv Method

Weakening Mechanisms of Alpine Fault Gouge in High‐Velocity Shear Experiments

2019 ◽  
Vol 124 (7) ◽  
pp. 7413-7428 ◽  
Author(s):  
Xiaofeng Chen ◽  
Chance B. Morgan ◽  
Brett M. Carpenter ◽  
Ze'ev Reches
Keyword(s):  
High Velocity ◽  
Fault Gouge ◽  
Velocity Shear ◽  
Alpine Fault

On the Kelvin-Helmholtz instabilities of high-velocity magnetized shear layers

1986 ◽  
Vol 302 ◽  
pp. 188 ◽  
Author(s):  
S. Roychoudhury ◽  
R. V. E. Lovelace
Keyword(s):  
High Velocity ◽  
Shear Layers

scholarly journals The frictional strength of talc gouge in high-velocity shear experiments

2017 ◽  
Vol 122 (5) ◽  
pp. 3661-3676 ◽  
Author(s):  
Xiaofeng Chen ◽  
Andrew S. Elwood Madden ◽  
Ze'ev Reches
Keyword(s):  
High Velocity ◽  
Velocity Shear ◽  
Frictional Strength

The Flame Structure of High Intensity Multi-Jet Shear Layer Enclosed Turbulent Diffusion Flames

1992 ◽  
Author(s):  
G. E. Andrews ◽  
A. F. Ali Al-Shaikhly
Keyword(s):  
Shear Layer ◽  
High Velocity ◽  
High Intensity ◽  
High Efficiency ◽  
Shear Layers ◽  
Operating Conditions ◽  
Fuel Injector ◽  
Propane Combustion ◽  
Wide Range ◽  
Air Mixing

Fuel injection into high velocity jet shear layers in an enclosed 140mm diameter conical flame stabiliser, with four large jet shear layers and a central radial fuel injector, was studied at operating conditions relevant to high intensity burners and gas turbine primary zones. The mean exhaust emissions for propane were shown exhibit a high efficiency over a wide range of equivalence ratios with a good turn down ratio. Fuel and air mixing, propane combustion development and NOx formation was investigated using internal gas composition measurements at three simulated lean primary zone operating conditions. The combustion development and emissions was shown to be dominated by fuel and air mixing between a rich outer recirculation zone and a high velocity lean inner shear layer outflow region. An aerodynamically generated rich lean combustion system was generated without fuel or air staging, but the interface mixing region resulted in significant NOx generation.

Stability of the Landau resonance for drift modes in rotating tokamak plasma

2003 ◽  
Vol 69 (5) ◽  
pp. 371-382
Author(s):  
E. ASP ◽  
V. P. PAVLENKO ◽  
S. M. REVENCHUK
Keyword(s):  
Dispersion Relation ◽  
Linear Stability ◽  
High Velocity ◽  
Velocity Shear ◽  
Landau Damping ◽  
Tokamak Plasma ◽  
Drift Waves ◽  
Two Dimensional

The linear stability of drift waves in a poloidally rotating tokamak plasma is considered. The derived dispersion relation features a peaking of the diamagnetic frequency which gives the drift modes an irreducible two-dimensional character. We then show that inverse Landau damping can be suppressed and even stabilized, if the flow's shear is strong. Even though the instability, excited by the Landau resonance, is stronger at a high velocity shear for positive rotation velocities, effects due to the rotation of the plasma can reverse the sign and induce damping of the two-dimensional drift modes. This stabilizing mechanism works only for positive rotation velocities. For negative rotation velocities, we show that only modes with high poloidal mode numbers are unstable.

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