Laminar Lifted Flame Velocity Measurements for Aerosols of Metals and Mechanical Alloys

2003 ◽  
Author(s):  
Yuriy Shoshin ◽  
Edward Dreizin
Keyword(s):  
Flame Velocity ◽  
Velocity Measurements ◽  
Lifted Flame

A New, Accurate Method for the Measurement of Rise Velocities in Laminar Flames

1978 ◽  
Vol 32 (4) ◽  
pp. 377-380 ◽  
Author(s):  
Charles B. Boss ◽  
Gary M. Hieftje
Keyword(s):  
Alkaline Earth ◽  
Accurate Method ◽  
Laminar Flames ◽  
New Technique ◽  
Flame Velocity ◽  
Atomic Vapor ◽  
Velocity Measurements ◽  
Alkaline Earth Elements ◽  
Time Required ◽  
Small Cloud

A novel technique is introduced for the measurement of rise velocities of hot, laminar flames. The new technique is straightforward to implement, rapid to employ, and more accurate than previous methods based on the observation of moving heated particles. In the method, tiny individual droplets of a solution containing alkali or alkaline earth elements are repetitively introduced into the flame to be examined. The small cloud of atomic vapor which is produced upon atomization of a droplet is then monitored photometrically as it passes two well-defined points in the flame. Knowledge of the distance between the points and measurement of the time required for the atoms to traverse it thus enables the flame velocity to be calculated. Conveniently, velocity measurements with this technique are localized in the flame, thereby permitting spatial variations in flame velocity to be examined. Moreover, the negligible mass of the moving, measured atom cloud eliminates error otherwise caused by gravitational attraction and its decelerating effect. The utility of this new technique is demonstrated through the measurement of localized velocities in a laminar, air-acetylene flame.

Observations of Flame Behavior in a Laboratory-Scale Pre-Mixed Natural Gas/Air Gas Turbine Combustor From LDA Velocity Measurements

2002 ◽  
Author(s):  
Paul O. Hedman ◽  
Robert L. Murray ◽  
Thomas H. Fletcher
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Tangential Velocity ◽  
Operating Conditions ◽  
Laboratory Scale ◽  
Flame Velocity ◽  
Velocity Measurements ◽  
Gas Turbine Combustor ◽  
Stable Case ◽  
Gas Flame

The objective of this study was to obtain simultaneous axial/radial and axial/tangential velocity measurements in a laboratory-scale, gas-turbine combustor (LSGTC) with a pre-mixed, swirl-stabilized, natural gas flame. Velocity measurements were obtained at each of four operating conditions (high swirl and medium swirl at fuel equivalence ratios of 0.80 and 0.65). Example results of mean and standard deviation axial, radial, and tangential velocities are included in this paper for the high swirl (HS), φ = 0.80 case (most stable flame) and the medium swirl (MS), φ = 0.65 case (least stable case). Additionally, example probably density distributions (PDF) for the axial velocity at the 80 mm axial location are presented for the same two cases.

Laser ion time-of-flight (LITOF) velocity measurements using N2(+) tracers

1994 ◽  
Author(s):  
James Ress ◽  
Gabriel Laufer ◽  
Roland Krauss
Keyword(s):  
Time Of Flight ◽  
Velocity Measurements

Ozone Tagging Velocimetry for unseeded velocity measurements in air flows

1998 ◽  
Author(s):  
Robert Pita ◽  
Lubomir Ribarov ◽  
Joseph Wehrmeyer ◽  
Farrokh Batliwala ◽  
Peter DeBarber
Keyword(s):  
Velocity Measurements ◽  
Air Flows

ESTIMATION OF THOMSEN'S EPSILON AND DELTA IN A SINGLE CORE USING ULTRASONIC PHASE AND GROUP VELOCITY MEASUREMENTS

2019 ◽  
Author(s):  
Gabriel Gallardo-Giozza ◽  
D. Nicolás Espinoza ◽  
Carlos Torres-Verdín ◽  
Elsa Maalouf
Keyword(s):  
Group Velocity ◽  
Velocity Measurements
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