Effects of turbulence and strain rate on hydrogen-enriched high Karlovitz number lean premixed methane flames

Fuel ◽  
2018 ◽  
Vol 211 ◽  
pp. 754-766 ◽  
Author(s):  
David Cicoria ◽  
C.K. Chan
Keyword(s):  
Strain Rate ◽  
Lean Premixed ◽  
Methane Flames ◽  
High Karlovitz Number

Suppression limits of low strain rate non-premixed methane flames

2003 ◽  
Vol 133 (3) ◽  
pp. 299-310 ◽  
Author(s):  
M. Bundy ◽  
A. Hamins ◽  
Ki Yong Lee
Keyword(s):  
Strain Rate ◽  
Methane Flames ◽  
Low Strain Rate

Stochastic Simulation of NO Formation in Lean Premixed Methane Flames

2000 ◽  
Vol 153 (1) ◽  
pp. 295-311 ◽  
Author(s):  
NORBERTO FUEYO ◽  
WILLIAM VICENTE ◽  
JAVIER BLASCO ◽  
CÉSAR DOPAZO
Keyword(s):  
Stochastic Simulation ◽  
No Formation ◽  
Lean Premixed ◽  
Methane Flames

PDF MODELING OF CO AND NO FORMATION IN LEAN PREMIXED METHANE FLAMES

2004 ◽  
Vol 176 (4) ◽  
pp. 585-601 ◽  
Author(s):  
WILLIAM VICENTE∗ ◽  
MARTÍN SALINAS ◽  
ESTEBAN BARRIOS ◽  
CÉSAR DOPAZO
Keyword(s):  
No Formation ◽  
Lean Premixed ◽  
Methane Flames

Strain-rate effects on hydrogen-enhanced lean premixed combustion

2001 ◽  
Vol 124 (4) ◽  
pp. 717-720 ◽  
Author(s):  
J.-Y Ren ◽  
W Qin ◽  
F.N Egolfopoulos ◽  
T.T Tsotsis
Keyword(s):  
Strain Rate ◽  
Premixed Combustion ◽  
Strain Rate Effects ◽  
Lean Premixed Combustion ◽  
Rate Effects ◽  
Lean Premixed

Dislocation Substructures Produced During Tensile, Creep, and Fatigue Deformation of Ti3Al at 700°C

1977 ◽  
Vol 35 ◽  
pp. 272-273
Author(s):  
S. M. L. Sastry
Keyword(s):  
Intermetallic Compound ◽  
Strain Rate ◽  
Tensile Creep ◽  
Slip Systems ◽  
Slip Vector ◽  
Superlattice Structure ◽  
Slip Activity ◽  
Dislocation Arrangement ◽  
Ordered Intermetallic ◽  
Tangled Dislocation

Ti3Al is an ordered intermetallic compound having the DO19-type superlattice structure. The compound exhibits very limited ductility in tension below 700°C because of a pronounced planarity of slip and the absence of a sufficient number of independent slip systems. Significant differences in slip behavior in the compound as a result of differences in strain rate and mode of deformation are reported here.Figure 1 is a comparison of dislocation substructures in polycrystalline Ti3Al specimens deformed in tension, creep, and fatigue. Slip activity on both the basal and prism planes is observed for each mode of deformation. The dominant slip vector in unidirectional deformation is the a-type (b) = <1120>) (Fig. la). The dislocations are straight, occur for the most part in a screw orientation, and are arranged in planar bands. In contrast, the dislocation distribution in specimens crept at 700°C (Fig. lb) is characterized by a much reduced planarity of slip, a tangled dislocation arrangement instead of planar bands, and an increased incidence of nonbasal slip vectors.

Quantitative analysis of in situ straining experiments in the case of strong frictional forces

1978 ◽  
Vol 36 (1) ◽  
pp. 570-571
Author(s):  
F. Louchet ◽  
L.P. Kubin
Keyword(s):  
Strain Rate ◽  
Radiation Effects ◽  
Dislocation Line ◽  
Critical Length ◽  
Local Strain ◽  
Local Flow ◽  
Double Kink ◽  
Dislocation Densities ◽  
Frictional Forces ◽  
Local Strain Rate

Investigation of frictional forces -Experimental techniques and working conditions in the high voltage electron microscope have already been described (1). Care has been taken in order to minimize both surface and radiation effects under deformation conditions.Dislocation densities and velocities are measured on the records of the deformation. It can be noticed that mobile dislocation densities can be far below the total dislocation density in the operative system. The local strain-rate can be deduced from these measurements. The local flow stresses are deduced from the curvature radii of the dislocations when the local strain-rate reaches the values of ∿ 10-4 s-1.For a straight screw segment of length L moving by double-kink nucleation between two pinning points, the velocity is :where ΔG(τ) is the activation energy and lc the critical length for double-kink nucleation. The term L/lc takes into account the number of simultaneous attempts for double-kink nucleation on the dislocation line.

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