Results 261 to 270 of about 44,954 (307)
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Journal of the Atmospheric Sciences, 1980
Abstract The effect of annealing in accreted ice has been investigated for artificially grown ice deposits after ∼100 days of storage in a deep freeze unit. Cross sections of the cylindrical deposits have been cut and replicated soon after growth and after annealing to determine the average cross section σ¯, the maximum length li, the maximum width wi,
F. Prodi, L. Levi
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Abstract The effect of annealing in accreted ice has been investigated for artificially grown ice deposits after ∼100 days of storage in a deep freeze unit. Cross sections of the cylindrical deposits have been cut and replicated soon after growth and after annealing to determine the average cross section σ¯, the maximum length li, the maximum width wi,
F. Prodi, L. Levi
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Multielement airfoil ice accretion
13th Applied Aerodynamics Conference, 1995Thomas Washington * and Mark Drela t MIT Department of Aeronautics and Astronautics Cambridge, MA 02139 A numerical tool for the study of airfoil ice accretion has been developed, combining current ice accretion technology with a multielement airfoil design/analysis routine. Particle trajectory integration is used to find the impinging water mass along
Thomas Washington, Mark Drela
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Microwave Ice Accretion Measurement Instrument /MIAMI/
Journal of Aircraft, 1982Instrument used on operations aircraft to warn pilot of onset of dangerous ice buildup or as research tool for use in studying aircraft icing phenomena and in cloud research. MIAMI is embedded in surface to be monitored and conforms to surface contour.
B. MAGENHEIM, J. ROCKS
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Quarterly Journal of the Royal Meteorological Society, 1986
AbstractThe density of accreted ice has been experimentally investigated by performing local measurements with a technique based on X‐ray micrography of calibrated slices.Accreted ice deposits were grown on fixed cylinders, which allowed an investigation of the accretion process in steadier and more regular conditions at the stagnation point, avoiding ...
F. Prodi, L. Levi, P. Pederzoli
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AbstractThe density of accreted ice has been experimentally investigated by performing local measurements with a technique based on X‐ray micrography of calibrated slices.Accreted ice deposits were grown on fixed cylinders, which allowed an investigation of the accretion process in steadier and more regular conditions at the stagnation point, avoiding ...
F. Prodi, L. Levi, P. Pederzoli
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Airfoil Ice-Accretion Aerodynamic Simulation
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007NASA Glenn Research Center, ONERA, and the University of Illinois are conducting a major research program whose goal is to improve our understanding of the aerodynamic scaling of ice accretions on airfoils. The program when it is completed will result in validated scaled simulation methods that produce the essential aerodynamic features of the full ...
Michael Bragg +5 more
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CIRAAMIL Ice Accretion Code Improvements
1st AIAA Atmospheric and Space Environments Conference, 2009This paper presents improvements to the CIRAAMIL ice accretion software developed at AMIL (Anti-Icing Materials International Laboratory) in a joint project with CIRA (Italian Aerospace Research Center). The software is based on a panel method for flow field, Lagrange formulation for water droplet trajectories and the ice accretion thermodynamic model ...
Fortin, Guy +3 more
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Quarterly Journal of the Royal Meteorological Society, 1975
AbstractOn the assumption that the concentration of air bubbles formed in freezing water is a function of the freezing rate, an expression for the concentration of air bubbles in accreted ice has been deduced. This expression has been confirmed by measurements of the bubble concentrations and size distributions in frozen bulk water and in ice accreted ...
J. N. Carras, W. C. Macklin
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AbstractOn the assumption that the concentration of air bubbles formed in freezing water is a function of the freezing rate, an expression for the concentration of air bubbles in accreted ice has been deduced. This expression has been confirmed by measurements of the bubble concentrations and size distributions in frozen bulk water and in ice accreted ...
J. N. Carras, W. C. Macklin
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Crystal structure of ice accretions
Il Nuovo Cimento C, 1978The crystal size in accretions grown in an icing wind tunnel at ambient temperatures −18≥Ta≥−27°C and different substrate ...
L. Levi, L. Lubart, E. M. de Achaval
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Modeling of Ice Accretion on Wires
Journal of Climate and Applied Meteorology, 1984A time-dependent numerical model of ice accretion on wires, such as overhead conductors, is presented. Simulations of atmospheric icing are made with the model in order to examine the dependence of the accreted ice amount on atmospheric conditions. The results show that in wet growth (glaze formation) under constant atmospheric conditions, the growth ...
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Stochastic models of ice accretion
Atmospheric Research, 1994Abstract New stochastic models have been developed to simulate atmospheric ice accretions at low values of impaction parameters. In 2-dimensional models of ice accretion on cylindrical objects (disks impinging on a larger size disk) the restriction of rectilinear trajectories is removed and some flow dynamics is introduced by analytically calculating
PRODI, Franco +2 more
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