Atomic Fluorescence Study of High Temperature Aerodynamic Levitation

1981 ◽  
Vol 9 ◽  
Author(s):  
Paul C. Nordine ◽  
Robert A. Schiffman ◽  
D. S. Sethi
Keyword(s):  
High Temperature ◽  
Supersonic Jet ◽  
Ideal Gas ◽  
Thermal Gradients ◽  
Fluorescence Study ◽  
Atomic Fluorescence ◽  
Argon Gas ◽  
Supersonic Jet Expansion ◽  
Aerodynamic Levitation ◽  
Fluorescence Thermometry

ABSTRACTUltraviolet laser induced atomic fluorescence has been used to characterize supersonic jet aerodynamic levitation experiments. The levitated specimen was a 0.4 cm sapphire sphere that was separately heated at temperatures up to 2327K by an infrared laser. The supersonic jet expansion and thermal gradients in the specimen wake were studied by measuring spatial variations in the concentration of atomic Hg added to the levitating argon gas stream. Further applications of atomic fluorescence in containerless experiments, such as ideal gas fluorescence thermometry and containerless process control are discussed.

Atomic fluorescence study on iron, cobalt, and nickel

1969 ◽  
Vol 41 (3) ◽  
pp. 518-522 ◽  
Author(s):  
Jaroslav. Matousek ◽  
Vaclav. Sychra
Keyword(s):  
Fluorescence Study ◽  
Atomic Fluorescence ◽  
Iron Cobalt ◽  
Cobalt And Nickel

A New Liquid Droplet Laser Desorption Source Combined with Supersonic Jet Expansion: Application to Phenol and its Water Clusters

2014 ◽  
Vol 228 (4-5) ◽  
Author(s):  
Chayan Kanti Nandi ◽  
Hans-Dieter Barth ◽  
Bernhard Brutschy
Keyword(s):  
Gas Phase ◽  
Water Clusters ◽  
Liquid Droplet ◽  
Supersonic Jet ◽  
Laser Desorption ◽  
Laser Source ◽  
Published Data ◽  
Two Photon ◽  
Supersonic Jet Expansion ◽  
Phase Out

AbstractWe have developed a new laser source, for the spectroscopy of nonvolatile molecules in gas phase. It is based on a laser induced liquid bead ion desorption source (LILBID) combined with a supersonic beam. The cold molecules produced with this technique are sampled with Resonant Two Photon Ionization spectroscopy (R2PI) to measurement of the gas phase optical spectra. LILBID allows to bring nonvolatile molecule from liquid phase (out of a droplet) into gas phase, by means of multi photon ablation with IR photons exciting the vibrations of the solvent. Phenol and its different water clusters have been used as an example to demonstrate the method and to standardise the new experimental setup. The recorded R2PI spectral data of phenol monomer and its different water clusters obtained from this laser desorption technique are in very good agreement with the previously published data. This technique opens a new door for the measurement of molecules under microsolvation and potentially for

Temperature Corrected Turbulence Model for High Temperature Jet Flow

2004 ◽  
Vol 126 (5) ◽  
pp. 844-850 ◽  
Author(s):  
Khaled S. Abdol-Hamid ◽  
S. Paul Pao ◽  
Steven J. Massey ◽  
Alaa Elmiligui
Keyword(s):  
High Temperature ◽  
Turbulence Model ◽  
Room Temperature ◽  
Eddy Viscosity ◽  
Mixing Layer ◽  
Supersonic Jet ◽  
Turbulence Models ◽  
Jet Flows ◽  
Viscosity Term ◽  
Mixing Layer Flows

It is well known that the two-equation turbulence models under-predict mixing in the shear layer for high temperature jet flows. These turbulence models were developed and calibrated for room temperature, low Mach number, and plane mixing layer flows. In the present study, four existing modifications to the two-equation turbulence model are implemented in PAB3D and their effect is assessed for high temperature jet flows. In addition, a new temperature gradient correction to the eddy viscosity term is tested and calibrated. The new model was found to be in the best agreement with experimental data for subsonic and supersonic jet flows at both low and high temperatures.

Multiphoton Ionization of Mixed Benzene-Water-Metanol Clusters. Competitive Microscopic Solvation

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1217-1218 ◽  
Author(s):  
K. O. Börnsen ◽  
H. L. Selzle ◽  
E. W. Schlag
Keyword(s):  
Complex Formation ◽  
Water Molecule ◽  
Ternary Mixture ◽  
Multiphoton Ionization ◽  
Supersonic Jet ◽  
Polar Molecules ◽  
Supersonic Jet Expansion ◽  
Single Water Molecule

Abstract Clusters of benzene with polar molecules are observed from a supersonic jet expansion of a ternary mixture of benzene, water and methanol seeded in Helium. It is found that complex formation with methanol is strongly enhanced when a single water molecule is preadsorbed.

Symmetry selective cooling in the supersonic jet expansion of methane

1991 ◽  
Vol 146 (1) ◽  
pp. 181-187 ◽  
Author(s):  
Martin Hepp ◽  
G. Winnewisser ◽  
K.M.T. Yamada
Keyword(s):  
Supersonic Jet ◽  
Selective Cooling ◽  
Supersonic Jet Expansion
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