Characterization of ice roughness from simulated icing encounters
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National Aeronautics and Space Administration, National Technical Information Service, distributor , [Washington, DC], [Springfield, Va
Ice formation., Aircraft icing., Surface roughness., Size (Dimensions), Simula
|Statement||David N. Anderson and J. Shin.|
|Series||NASA technical memorandum -- 107400|
|Contributions||Shin, J., United States. National Aeronautics and Space Administration.|
|The Physical Object|
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Glaze-ice accretion beginning to form after a short ex-posure to an icing spray. From digital photographs of such ice accretions for a variety of test conditions and exposure limes Shin found that the ice-roughness ele-ments took the form of hemispheres on the surface of an ice substrate.
These roughness dementsformedFile Size: KB. Characterization of Ice Roughness From. Characterization of Ice Roughness from Simulated Icing Encounters.
David N. Anderson. and. Jaiwon, "Characterization of Surface Rough. Characterization of ice roughness from simulated icing encounters Characterization of Ice Roughness Variations in Scaled Glaze Icing Conditions Infrared and Hot-Wire Investigations of Ice Roughness Induced Transition.
13 June Ice Roughness in Short Duration SLD Icing Events. 13 June Aircraft Icing Research at NASA Glenn. Get this from a library. Characterization of ice roughness from simulated icing encounters. [David N Anderson; J Shin; United States. National Aeronautics and Space Administration.].
Detailed measurements of the size of roughness elements on ice accreted on models in the NASA Lewis Icing Research Tunnel (IRT) were made in a previous study.
Only limited data from that study have been published, but included were the roughness element height, diameter and : Jaiwon Shin and David N. Anderson. roughness characteristics on each airfoil were then compared using the relative geometries of the airfoil.
Details Characterization of ice roughness from simulated icing encounters PDF
The results indicate that features of the ice shape and roughness such as glaze-ice plateau limits and maximum airfoil roughness were captured well by Weber number and collection efficiency scaling of glaze icing conditions. By studying the effect of ice roughness on the final ice shape and comparing the experimental ice shapes with simulation results, a set of calculation formulas about the ice surface roughness in different icing conditions (temperature, speed, liquid water content, etc) Characterization of ice roughness from simulated icing encounters book by: 1.
Introduction. The icing mitigation systems can be divided in anti-icing systems and de-icing systems. In the group of anti-ice systems, the application of coatings is one of the possible methods for preventing the icing of aeronautical components (leading edges, wings, radomes and so on).
Ice destroys the smooth flow of air, increasing drag while decreasing the ability of the airfoil to Cited by: 2. PDF | A study of the effect of the assumed ice roughness on ice shape prediction and aerodynamic performance degradation has been conducted to quantify | Find, read and cite all the research.
Two parameters, the arithmetic average roughness height, Ra, and the averaged roughness height, based on the integrated ice thickness at the blade tip, are introduced to describe the ice-induced. Numerical Simulation of Ice Shapes from a Bimodal Large Droplet Icing Cloud. Mark Potapczuk and Dean Miller.
Investigation of surface water behavior during glaze ice accretion. John Hansman Jr. and Characterization of ice roughness from simulated icing encounters. Investigation of surface water behavior during glaze ice accretion.
HANSMAN, by: Statistical analysis of the resulting data sets permits characterization of ice surface roughness with a much higher statistical confidence than previously possible.
A survey of results in the range −39°C to −29°C shows that characteristics of the roughness (e.g., Weibull parameters) are sensitive not only to the degree of roughening but Cited by: 3.
Aircraft icing model considering both rime ice property variability and runback water effect International Journal of Heat and Mass Transfer, Vol. Study of the Effect of Centrifugal Force on Rotor Blade Icing ProcessCited by: Characterization of Ice Roughness and Influence on Aerodynamic Performance of Simulated Ice Shape", ().
Characterization of Ice Roughness from Simulated Icing Encounters",Author: Jafar S. Alzaili. Although preliminary, the success of these correlations suggests that it may be possible to develop simple relationships between ice roughness and icing conditions for use in ice-accretion.
Ice accretion on aircraft components is an enormous threat to flight safety. In this paper, ice accretions on the leading edge of the NACA airfoil and the NLR multi-element airfoil with. extracting parametric representations of ice roughness using multiple images of roughness elements.
In this study, the ice roughness developed on a in. NACA at 0q angle of attack exposed to short duration SLD icing events was measured in the Icing Research Tunnel at the NASA Glenn Research Center. The MVD’s used in the study ranged Cited by: Ice Accretion Roughness Measurements and Modeling. Stephen T.
McClain*, Mario Vargas **, Jen-Ching Tsao §, Andy P. Broeren**, and Sam Lee *Baylor University. One Bear Place #, Waco, TX **NASA Glenn Research Center Brookpark Rd., MSCleveland, OH § Ohio Aerospace Institute.
Brookpark Rd., MS ,File Size: 4MB. ice roughness on the transient water/ice run-back behavior during glaze icing process over a NACA airfoil. A digital image projection-correlation (DIPC) technique was applied to provide non-intrusive, temporally resolved, and full-field measurements of the dynamic water/ice thickness distributions over.
The measured high drag rates and increased stall speeds in these rare icing conditions were attributed to the rapid development of small, rough ice elements in the 5%–15% of chord on the negative pressure or “lift” side of an airfoil.
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These roughness elements are a Cited by: 3. The aim of this study was to systematically study the ice adhesion strength on various surfaces by de-coupling the effects of surface roughness and surface energy on ice adhesion strength. Experimental details Sample preparation.
The substrate used in this study is AA Al of dimension mm × mm × by: A m-long, m-wide rectangular channel was constructed, and a simulated ice cover was installed on each side wall.
A set of four experiments was designed to quantify the effects of channel-bed and border-ice roughness on the flow characteristics within a partially covered rectangular channel.
Choosing Critical Ice Shapes on Airfoil Surface for the Icing Certification of Aircraft Dry-air flight tests with simulated ice shapes and natural icing flight tests. Make simulated ice shape according to the ice shape chosen in Step (4), and conduct dry-air flight test to determine the critical ice Cited by: 5.
Roughness, age and drift trajectories of sea ice in large-scale ice roughness, are deri\'cd as the product of the stress tensor (0') and the strain rate (E) from the viscous-plastic rheology Figure I shows the simulated sea-ice roughness for February The greatest of roughness.
The anti-icing property of the as-prepared SHP surface was investigated in an artificial climate chamber. The details of the artificial climate chamber can be found in references. In this paper, “glaze ice” was simulated and the anti-icing property of the as-prepared SHP surface was investigated in the artificial climate by: if roughness features scale with model size or with liquid-water content when appropriate scaling methods are used.
NACA airfoils with chords ofand cm were tested with glaze-ice conditions for icing times from 14 – sec. The ice roughness characteristics were recorded photographically for later analysis.  In this paper, sea ice thickness, roughness and ice motion data collected during the field study in Amundsen Gulf region are described.
The data are compared qualitatively with Radarsat SAR (synthetic aperture radar) and Envisat ASAR (advanced SAR) satellite imagery since radar backscatter is a function of both ice type (or level ice thickness) and surface roughness. Roughness, age and drift trajectories of sea ice in large-scale simulations and their use in model verifications, Annals of Glaciol in press Google Scholar Hibler, W.D.
A dynamic-thermodynamic sea ice model, J. Phys. Oceanogr., 9, – CrossRef Google ScholarAuthor: Nadja Steiner, Markus Harder, Peter Lemke.
Description Characterization of ice roughness from simulated icing encounters EPUB
Convective Heat Transfer from Realistic Ice Accretion Roughness. Ice accretion effects are mitigated during aircraft design using computer codes such as LEWICE. The characterization of convective heat transfer from surfaces with ice roughness is a significant area for improvement of these codes.
Purchase Development of Methods for Characterisation of Roughness in Three Dimensions - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1.RIME ICE “Cold" cloud temps. M0*C to *C) Small droplets (12p typ.) GLAZE ICE “Warm" cloud temps. (0 # C to *C) Large droplets (20p typ.) Figure 1.
Typical "rime" and "glaze" ice shapes. When all of the impinging droplets freeze on impact with the accreting surface the ice accretion is character ized as rime ice.Numerical investigation of roughness effects in aircraft icing calculations by Brian Daniel Matheis A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Aerospace Engineering Program of Study Committee: Alric Rothmayer, Major Professor Fred L.
Haan Jr. Tom I.-P.
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