The Effect of Lens/Aperture Selection on Phase Doppler Anemometer Measurements

2004 ◽  
Author(s):  
John Davis ◽  
Peter Disimile
Keyword(s):  
Lens Aperture ◽  
Phase Doppler Anemometer

Investigation of atomization performance on a centrifugal fuel slinger with phase Doppler anemometer

2021 ◽  
Author(s):  
Zhiliang Xue ◽  
Feng Li ◽  
Youqi Zhu ◽  
Zhi Jiang ◽  
Yonggang Zhou ◽  
...  
Keyword(s):  
Phase Doppler Anemometer ◽  
Atomization Performance

Orientational Movements of the Foot of Littorina Species in Relation to the Plane of Vibration of Polarized Light

1961 ◽  
Vol 38 (1) ◽  
pp. 213-224
Author(s):  
G. H. CHARLES
Keyword(s):  
Polarized Light ◽  
Angle Of Incidence ◽  
Virtual Absence ◽  
Lens Aperture ◽  
Light Rays ◽  
Stimulation Of

1. Littorina littoralis (L.), L. saxatilis (L.), L. neritoides (L.) and L. littorea (L.) responded to the plane of vibration (e vector) of polarized light directly incident upon their eyes in the virtual absence of any substrate reflexions. Photonegative winkles orientated parallel with the plane of vibration and photopositive individuals at right angles to this plane. 2. Decrease of the angle of incidence towards zero of polarized light rays incident upon the lens aperture of Littorina littoralis completely destroyed the ability to orientate to the plane of vibration. This can be explained on the basis of a Fresnel reflexion/refraction mechanism of orientation. 3. Unilaterally blinded Littorina littoralis gave just as good an orientation to vertical rays of polarized light as winkles with intact vision. 4. It is concluded that the eyes of Littorina species are capable of detecting the plane of vibration of polarized light directly incident from above by means of a Fresnel reflexion/refraction mechanism, and that orientation does not depend on balanced stimulation of the two eyes.

Characterization of Spray Flows Under High Fuel Temperature Using Phase Doppler Anemometer

1997 ◽  
pp. 495-508 ◽  
Author(s):  
Tomio Obokata ◽  
Tsuneaki Ishima ◽  
Tetsuji Koyama ◽  
Kouichi Uehara ◽  
Kazumitsu Kobayashi ◽  
...  
Keyword(s):  
Fuel Temperature ◽  
Phase Doppler Anemometer ◽  
Spray Flows

THE SPECTACLE LENS APERTURE

1944 ◽  
Vol 27 (3) ◽  
pp. 104-115
Author(s):  
JOHN D. SPOONER
Keyword(s):  
Spectacle Lens ◽  
Lens Aperture

Characterization of Superheated Liquid Jet Atomisation With Phase Doppler Anemometer (PDA) and High-Speed Imaging

2006 ◽  
Author(s):  
Dilek Yildiz ◽  
Patrick Rambaud ◽  
Jeroen van Beeck ◽  
Jean-Marie Buchlin
Keyword(s):  
Droplet Size ◽  
High Speed ◽  
Initial Conditions ◽  
Particle Diameter ◽  
Superheated Liquid ◽  
High Speed Imaging ◽  
Two Phase ◽  
Phase Doppler Anemometer ◽  
Geometrical Effects ◽  
Initial Storage

A flashing phenomenon is often met in liquid propulsion of safety fields in industrial environments. This violent evaporation occurs when a liquid finds itself suddenly in a thermodynamic non-equilibrium and becomes superheated. To investigate theoretically the source processes and validate models for design and safety assessments, knowledge of accurate and reliable data such as distribution of droplet size, velocity and temperature in the closest field of flashing occurrence is mandatory. In this present work, an experimental study is undertaken in order to characterize the two-phase jet after a sudden accidental release and aims to quantify the effects of initial conditions such as initial storage pressure, temperature, geometrical effects of the release points etc on the spray characteristics. To fulfil this goal, a laser-based optical technique like Phase Doppler Anemometry (PDA) is used to obtain information for particle diameter and velocity evolution in this harsh environment. Cases for different initial pressures, temperatures and orifice diameters are studied and the droplet size and velocity evolution are presented in function of initial parameters.

scholarly journals Application of Advanced Diagnostics to Airblast Injector Flows

1989 ◽  
Vol 111 (1) ◽  
pp. 53-62 ◽  
Author(s):  
J. B. McVey ◽  
J. B. Kennedy ◽  
S. Russell
Keyword(s):  
Flux Distribution ◽  
Liquid Droplet ◽  
Laser Doppler Velocimeter ◽  
Fuel Injector ◽  
Two Phase ◽  
Turbine Engine ◽  
Design Procedures ◽  
Phase Doppler Anemometer ◽  
Injector Flows ◽  
Component Phase

Experimental data on the characteristics of the spray produced by a gas turbine engine airblast fuel injector are reported. The data acquired include the mass-flux distribution, measured by use of a high-resolution spray patternator; the gas-phase velocity field, measured by use of a two-component laser-Doppler velocimeter; and the liquid droplet size and velocity distributions, measured by use of a single-component phase-Doppler anemometer. The data are intended for use in assessments of two-phase flow computational methods as applied to combustor design procedures.

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