Last edited by Tam
Monday, April 27, 2020 | History

3 edition of Stability relationship for water droplet crystallization with the NASA Lewis icing spray nozzle found in the catalog.

Stability relationship for water droplet crystallization with the NASA Lewis icing spray nozzle

Stability relationship for water droplet crystallization with the NASA Lewis icing spray nozzle

  • 391 Want to read
  • 33 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, D.C.], [Springfield, Va .
Written in English

    Subjects:
  • Crystallization.

  • Edition Notes

    StatementC. John Marek and C Scott Bartlett.
    SeriesNASA technical memorandum -- 100220.
    ContributionsBartlett, C. Scott., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14661986M

    Measuring bubble nucleation temperature on the surface of a rapidly heated thermal ink-jet heater immersed in a pool of water By C. T. Avedisian1, W. S. Osborne1 to create a droplet which then impacts the print media. Programmed delivery of. PDF; PDF; Print; Help NASA SBIR/STTR Program Support For questions about the NASA SBIR/STTR solicitations, the proposal preparation and electronic submission process, and other program related areas, please contact the NASA SBIR/STTR Program Support Office. Phone: Email: [email protected] NASA SBIR/STTR Program Support is available . droplet lifetimes for 2 cases of initial droplet diameters and freestream velocities obtained from the nu-merical model and experimental results of Gokalp et al. [31]. The comparison between the numerical re-sult and the experimental data is very good. The ambient gas employed in the numerical model is N. 2. and that used in the experiment [


Share this book
You might also like
Medical Disorders in Obstetric Practice

Medical Disorders in Obstetric Practice

Pakistans export potential

Pakistans export potential

Hristo Smyrnensky.

Hristo Smyrnensky.

Black Hearts in Battersea

Black Hearts in Battersea

The children of the chapel at Blackfriars, 1597-1603

The children of the chapel at Blackfriars, 1597-1603

The provincial administration of Siam, 1892-1915

The provincial administration of Siam, 1892-1915

Ethiopias economic policy during the transitional period

Ethiopias economic policy during the transitional period

Round-Table Meeting on Ethnicity in Nigeria--Implications for National Development

Round-Table Meeting on Ethnicity in Nigeria--Implications for National Development

Address in the legislature on January 24th, 1918.

Address in the legislature on January 24th, 1918.

The history of the Mitre and Purse

The history of the Mitre and Purse

Leaving home

Leaving home

Helping pupils with scholastic and behaviour problems within the normal school set-up in group methods.

Helping pupils with scholastic and behaviour problems within the normal school set-up in group methods.

Insolvent partnerships

Insolvent partnerships

Art journal.

Art journal.

Mizoguchi Kenji.

Mizoguchi Kenji.

Zoological philosophy

Zoological philosophy

Stability relationship for water droplet crystallization with the NASA Lewis icing spray nozzle Download PDF EPUB FB2

Stability Relationship for Water Droplet Crystallization With the NASA Lewis Icing Spray |NAS_-TM STABILITY RELATIONSHIP FOR WATER DROPLET CRYSTALLIZATION WITH THE NASA LEWIS ICING SPRAY (NASA) 20 p Avail: NTIS HC A03/RF &01 CSCL 14B G3/07 N Un cl as C.

John Marek Lewis Research Center Cleveland, Ohio. Stability relationship for water droplet crystallization with the NASA Lewis icing spray nozzle - NASA/ADS In order to produce small droplets for icing cloud simulation, high pressure air atomizing nozzles are used.

Get this from a library. Stability relationship for water droplet crystallization with the NASA Lewis icing spray nozzle. [Cecil J Marek; C Scott Bartlett; United States.

National Aeronautics and Space Administration.]. To avoid such low temperatures, it is necessary to heat the air and water to high initial temperatures. An icing spray research program was conducted to map the temperatures below which ice crystals form. A soot slide technique was used to determine the presence of crystals Author: C.

Scott Bartlett and C. John Marek. The Mean Volume droplets Diameter (MVD) of the artificial cloud has been determined using an Airborne Droplet Analyser (ADA) system based on Phase Doppler Particle Analyser (PDPA) technique, while the Liquid Water Content (LWC) measurements have been carried out using a standard icing blade.

The fitting relationships of droplet size and liquid water content are obtained. The influence of the nozzle water pressure, droplet size, test section velocity and nozzle number on the test section liquid water content are examined. Finally, the icing cloud operating envelop is built for the main test section.

Measurements of the stability of water jets discharging into air are presented for jets from nominal mm diameter nozzles having various internal profiles and contraction angles.

Typical stability curves were derived at values for Reynolds number usually associated with Cited by: 9. It was also found that the slope of the stability curve for mercury jets varied depending on the nozzle design, i.

In (a/b o) depends on nozzle design. Apparently, mercury was the only test liquid to exhibit this phenomenon. For jets of liquids such as glycerol/water solutions Cited by: Classical thermodynamics was used to model the vanillin and water phase diagram.

Activity coefficient models, NRTL and UNIQUAC, were used to regress experimental equilibrium data. The vanillin and water mixture displays a liquid–liquid equilibrium that interacts with vanillin’s solid–liquid equilibrium, thus creating a challenge for crystallization processes.

A compound with inserted water molecules is called a hydrate. The number of water molecules present per formula unit of a compound is indicated in the formula by adding a "dot", followed by the number of water molecules.

For example, the formula for hydrated copper sulfate would be written as: `~CuSO_4` `*` `~5H_2O`. The values of the water evaporation rate have been determined. It is shown that the dependence of the evaporation rate on the droplet surface temperature has a nonlinear character.

Characteristic relationships between the convective and radiative heat fluxes on the droplet surface Cited by: The coupling between energy flow and mass transfer in spray flash and droplet evaporation reheating is achieved.

Compared with traditional single-stage flash evaporator, the new scheme lifts the water separation rate to 48% from 5%, helps to compact the unit and uses low grade heat source as low as 40 °C. In this boiling regime, the impact droplet velocity (or Weber number) has a significant influence on the cooling efficiency.

For low Weber number, droplets cannot penetrate through the film layer. For high Weber number, droplets can penetrate through the film layer, and more surface contact can be by: 1. The term icing cloud uniformit y, really ref ers to the degree of liquid water distribution across t he tunnel test section.

It is desirable th at the liquid water withi n the cloud b e uniformly. of molecular crystals: structures and stabilities, temperature and pressure Johannes Hoja,1,2 Anthony M. Reilly3 and Alexandre Tkatchenko1,2* The understanding of the structure, stability, and response properties of molecu-lar crystals at finite temperature and pressure is crucial for the field of crystal engineering and their application.

Books at Amazon. The Books homepage helps you explore Earth's Biggest Bookstore without ever leaving the comfort of your couch. Here you'll find current best sellers in books, new releases in books, deals in books, Kindle.

Ideally 60–80C (–ºF) at the nozzle. To what air temperature is the fluid effective. In general, the de-icing service provider makes sure that the fluid freezing point (determined by the fluid strength; measured by a refractometer) is such that it will protect your aircraft for the current outside air temperature (OAT).

main operating conditions of plasma torch and main parameters of water vapour plasma jet were investigated. The power of plasma torch was 25–45kW; arc current was – A, the arc voltage was – V, the efficiency was – The average temperature of water vapour plasma jet in exhaust nozzle was – K, and the plasma.

The glass transition temperature of an amorphous pharmaceutical solid is a critical physical property which can dramatically influence its chemical stability, physical stability, and viscoelastic properties.

Water frequently acts as a potent plasticizer for such materials, and since many amorphous solids spontaneously absorb water from their surroundings the relationship Cited by: hydrate stability zone (HSZ), a region that includes the uppermost several hundred metres of sediment where low temperatures and high pressures force the excess methane dissolved in pore water to form hydrates (Gorman et al., ).

A BSR is identified on multi-channel or multi-component (4C) seismic sections as a high amplitude. Images of the spray and flow in the pipe correlated with the pressure fluctuation signal for an un- stable condition (2 kg/min of air and kg/min of water) using the standard configuration.

Knapper and House [9] used it in the stability anal- ysis of a spray issued from a nozzle assembly as the one used in this Size: KB. droplet combustion, soot production, flame spread, smoldering and gas jet flames).

This research program has been highly successful and was aided by synergistic programs in Europe and in Japan.

Overall improvements were made in the ability to model droplet combustion in spray combustors (e.g., jet engines), predict flame. Atmospheric conditions producing aircraft icing on January - A case study utilizing combinations of surface and remote sensors B.

STANKOV and A. BEDARD, JR. Improvements to the freeze crystallization method of water purification make possible several novel residential and commercial appliance concepts.

Operating in a batch pro-cess, source water enters a purifying chamber, a fraction of the water is purified via freeze crystallization and the unfrozen portion is discarded. The purified ice fraction isFile Size: 93KB. An Investigation of the Evaporation of a Droplet on a Solid Surface: Evaporation, Self-Assembly of Colloidal Deposits, and Interfacial Heat Transfer [Bhardwaj, Rajneesh] on *FREE* shipping on qualifying offers.

An Investigation of the Evaporation of a Droplet on a Solid Surface: Evaporation, Self-Assembly of Colloidal DepositsCited by: 3. We conjecture that the wrinkling phenomenon can be limited or even suppressed completely by utilizing a novel polymer based Liquid Crystal Elastomer material as constituent for the membrane.

Consequently, we propose to research the mechanics of Liquid Crystal Elastomer membranes, with emphasis on understanding the wrinkling behavior exhibited Author: Loura Hall. Simulation of the gas-liquid-solid three-phase flow field of outside the abrasive water jet(AWJ) nozzle is studied by the computed fluid dynamic software- FLUENT, and the velocity field of the three-phase flow is obtained, the velocity value of the flow between the nozzle and work-pieces is also obtained.

Serial experiments have been done to verify the simulation Cited by: 4. For water absorption, we fred a formal diffusion coefficient of x cm2/min when the nylon is ini-tially dry. The diffusion coefficient is 4 x cm2/min when the nylon is oil-impregnated prior to air exposure. In a 52% RH atmosphere, dry nylon absorbs 3% w/w water, and oil-impregnated nylon absorbs % w/w water.

nozzle and bulkhead, such that the temperature is kept sufficiently low to minimize heating of a composite motor casing under development. More so than metal casings, composites are susceptible to loss of strength and stiffness Thermal Ablative Experiments for the Sugar Shot Nose Cone at elevated temperature.

American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Phenolic resin is cheaper, high thermal stability, excellent tension strength and compressive strength, good resistance to chemicals and solvents as well.

Has a low water absorption rate, which is expensive components used in a plane or car [8]. The phenolic resin formed by compressing the fiber layer and the oven. Deutsches Elektronen-Synchrotron DESY. (, March 16). Novel nozzle saves crystals: Double flow concept widens spectrum for protein crystallography.

ScienceDaily. Retrieved Ma from. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard. ASTM Standards. D Test Method for Evaporation Loss of Lubricating Oils by the Noack Method.

D Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical. This preview shows page 21 - 25 out of 25 pages. Crystallization set up droplet is covered by oil. This prevents the evaporation of the very small drop.

The glass transition temperature of an amorphous pharmaceutical solid is a critical physical property which can dramatically influence its chemical stability, physical stability, and viscoelastic properties.

Water frequently acts as a potent plasticizer for such materials, and since many amorphous solids spontaneously absorb water from their Cited by: Four different droplet sizes,1,and mm, are considered in this study.

The droplet with a diameter of 1mm has a shorter life time in this specific environment. Keywords: multicomponent oil droplet dispersion, evaporation, dissolution, ocean circulation model, Rapid mixing model.

1 Introduction. Novel nozzle saves crystals—double flow concept widens spectrum for protein crystallography. protein and water ice crystals aggregate over time to form dripstone-like features.

The same. T1 - Stability of shear flows of polymeric liquid crystals. AU - Calderer, M. Carme. PY - /7. Y1 - /7. N2 - This article deals with flow phenomena in liquid crystal materials.

The governing equations are a generalization of the Leslie-Ericksen equations for liquid crystals with variable degree of by: Anti-icing is the proactive use of any melting agent to assist melting and resist the formation of a bond between snow and ice and the pavement surface. Highway anti-icing is the snow and ice control practice of preventing the formation or development of bonded snow and ice by timely applications of a chemical freezing-point depressant.

Stability analysis and minimum thrust vector control requirements of booster vehicles during atmospheric flight / (Washington, D. C.: National Aeronautics and Space Administration ; Springfield, Va.: for sale by the Clearinghouse for Federal Scientific and Technical Information, ), by Janos Borsody, Fred Teren, Lewis Research Center, and.

flow velocity in the splash plate nozzle ranges from 5 m/s to about 44 m/s. A rotameter is used to measure the flow rate of water from the pressurized tank to the plash plate nozzle.

The measurement extent of the two rotameters ranges from to L/min, and from L/min. For the solution of water and corn syrup, a graded cylinder and.Hydro Air Research Italia can offer a range of evaporators from to over kg/hour of condensate, in the main metal alloys and lined materials.

Evaporation and crystallization tests can be performed at Hydro Air Research Italia’s laboratories o at partner’s site, where pilot plants are available for bench and semi-industrial trials.NASA Images Solar System Collection Ames Research Center Brooklyn Museum Full text of " NASA Technical Reports Server (NTRS) Thermal Barrier Coating Workshop ".