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Monday, April 27, 2020 | History

3 edition of Cryogenic liquid-jet breakup in two-fluid atomizers found in the catalog.

Cryogenic liquid-jet breakup in two-fluid atomizers

Cryogenic liquid-jet breakup in two-fluid atomizers

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

    Subjects:
  • Aeronautical instruments.

  • Edition Notes

    Other titlesCryogenic liquid jet breakup in...
    StatementRobert D. Ingebo.
    SeriesNASA technical memorandum -- 103734
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17101135M


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Cryogenic liquid-jet breakup in two-fluid atomizers Download PDF EPUB FB2

Get this from a library. Cryogenic liquid-jet breakup in two-fluid atomizers. [Robert D Ingebo; United States. National Aeronautics and Space Administration.]. A two-fluid atomizer was used to study the breakup Cryogenic liquid-jet breakup in two-fluid atomizers book liquid-nitrogen jets in nitrogen, argon and helium atomizing-gas flows.

A scattered-light scanner particle sizing instrument previously developed at NASA Lewis Research Center was further developed and used to determine characteristic drop diameters for the cryogenic Cryogenic liquid-jet breakup in two-fluid atomizers book.

In the breakup. A two-fluid atomizer was used to study the breakup of liquid-nitrogen jets in nitrogen, argon, and helium atomizing gas flows. A scattered-light scanner particle sizing instrument previously developed at NASA Lewis Research Center was further developed and used to determine characteristic drop diameters for the cryogenic atheizm.com: Robert D.

Ingebo. Kenneth K. Kuo, Aerothermodynamic Effects on Liquid Jet Breakup in Two-Fluid Fuel Nozzles, Recent Advances in Spray Combustion: Spray Atomization and Drop Burning Phenomena, /, (), (). A correlation of aerodynamic and liquid-surface forces with characteristic drop diameter was obtained for cryogenic liquid-jet breakup in Mach 1 gas flow.

Nitrogen gas mass-flux was Cryogenic liquid-jet breakup in two-fluid atomizers book by using three differently sized two-fluid fuel atomizers with different nozzle diameters. Two pneumatic two-fluid atomizers were used with liquid and gaseous nitrogen to determine the effect of nitrogen gas flow rate on the characteristic drop size of a cryogenic spray.

Also, the effect of gas mass flux on the characteristic drop size was investigated to deter- mine a correlating expression for the two atheizm.com by: 7. A correlation of aerodynamic and liquid-surface forces with characteristic drop diameter was obtained for cryogenic liquid-jet breakup in Mach 1 gas flow.

Nitrogen gas mass-flux was varied by using three differently sized two-fluid fuel atomizers with different nozzle diametersAuthor: Robert D. Ingebo. Effect of liquid jet diameter on performance of coaxial two-fluid airblast atomizers Chemical Engineering and Processing: Process Intensification, Vol.

45, No. 4 Improved Plasma Torches for Appication in Supersonic CombustionCited by: We use Cryogenic liquid-jet breakup in two-fluid atomizers book to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services.

Breakup of liquid jets is a. A liquid jet emerging from a nozzle will experience in The breakup of jets in Rayleigh mode is explored and the breakup length obtained from our computations.

This study focuses on the low-pressure spraying of viscous liquids (μ = 60, and mPa s) using four types of internal-mixing twin-fluid atheizm.com compare two well-known designs, namely the Y-jet and “outside in gas” (OIG) effervescent atomizers, with our new design (CFT) and an “outside in liquid” (OIL) configuration for the effervescent atheizm.com by: May 17,  · Development of a new technique to generate microcapsules from the breakup of non-Newtonian highly viscous fluid jets 8 March | AIChE Journal, Vol.

57, No. 12 Development of a technology to produce monodispersed microparticles Cryogenic liquid-jet breakup in two-fluid atomizers book on the formation of drops from viscous non-Newtonian liquids sprayed through a fan jet nozzleCited by: Nov 20,  · The video shows the break-up of a liquid jet into droplets.

A scattered-light scanning instrument was used to measure the characteristic dropsize, D(sub v.5), of LN2 sprays and to determine the effect of droplet vaporization on experimental dropsize measurements. Under sonic gas-velocity conditions, liquid-jet breakup Cryogenic liquid-jet breakup in two-fluid atomizers book in the regime of aerodynamic stripping.

CRYOGENIC AND SIMULATED FUEL JET BREAKUP IN ARGON, HELIUM AND NITROGEN GASFLOWS Robert D. Ingebo National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio Abstract Two-phase flow atomization of liquid nitrogen jets was experimentally investigated.

They were co-axially in-jected into high-velocity gas flows of helium, nitrogen. obtained for cryogenic liquid-iet breakup in Mach I gasflow. Nitrogen gas mass-flux was varied from 5 to g/cm2 sec by using three differently sized two-fluid fuel atomizers with nozzle diameters varying from to cm. A correlation was derived by using acoustic gas velocity, Vc, as a basic parameter in defining and evaluating, the.

In this paper, the effect of liquid jet diameter on performance of coaxial two-fluid airblast atomizer has been investigated with water–air system in a wide region of liquid/gas mass flux ratio ( Cited by: Three-dimensional large eddy simulation of round liquid jet primary breakup in coaxial gas flow using the VOF method this work makes effort to present a reliable numerical method which can investigate the liquid primary breakup of atomizers with various dimensions.

Xiao, M. Dianat, J.J. McGuirkLES of single droplet and liquid jet Cited by: 7. Two phase liquid and gaseous nitrogen flow in a pneumatic two fluid atomizer was investigated. Characteristic dropsize for cryogenic sprays were measured with a scattered light scanning instrument developed at NASA-Lewis.

Tests were conducted primarily in the aerodynamic stripping regime of liquid jet atomization. At a sampling distance of bar-x= cm, the Sauter mean, D(sub 32), and volume Author: Robert D.

Ingebo. A two-fluid atomizer was used to study the breakup of liquid-nitrogen jets in nitrogen, argon, and helium atomizing gas flows. A scattered-light scanner particle sizing instrument previously. In this paper, the effect of liquid jet diameter on performance of coaxial two-fluid airblast atomizer has been investigated with water–air system in a wide region of liquid/gas mass flux ratio.

Therefore, the liquid deformation becomes more significant accompanied by more violent breakup of the liquid jet. At R e g = × 10 4, the liquid jet is atomized to obvious droplets.

It can be seen from Fig. 3b that the bubble expands after flowing out of the atomizer. And the breakup of the umbrella structure, resulting from the shear Author: Zhao-Wei Wu, Zhe-Hang Shi, Hui Zhao, Feng Yao, Hai-Feng Liu, Wei-Feng Li, Jian-Liang Xu.

Break-up and atomization of a round water jet secondary break-up if the forces exerted by the turbulent air exceed the confinement due to the surface tension and the liquid viscosity.

Fundamental studies of the break-up of individual drops submerged in turbulent flows were made by Kolmogorov (), Lane (), Hinze (), and many others. May 23,  · A large eddy simulation of the breakup and atomization of a liquid jet into a cross turbulent flow at various spray conditions International Journal of Heat and Mass Transfer, Vol.

Performance estimation of a venturi scrubber and its application to self-priming operation in decontaminating aerosol particulatesCited by: • TRANSIENT MULTIDIMENSIONAL MODELING OF AIR-BLAST ATOMIZERS David P.

Schmidt, Louis M. Chiappetta, Graham M. Goldin, Ravi K. Madabhushi • ULTRASOUND-MODULATED TWO-FLUID ATOMIZATION OF VISCOUS NEWTONIAN LIQUIDS Maha Yamak, Shirley C.

Tsai, Ken Law • A MODEL FOR NUMERICAL SIMULATION OF BREAKUP OF A LIQUID JET IN CROSSFLOW Ravi K. May 02,  · Surface breakup of a non-turbulent liquid jet injected into a high pressure gaseous crossflow International Journal of Multiphase Flow, Vol.

80 Visualization of sneeze ejecta: steps of fluid fragmentation leading to respiratory dropletsCited by: nitrogen particles formed by the disintegration of cryogenic-liquid jets in two-fluid atomizers. One of the most severe measurement problems is the loss of small drops due to their high vaporization rates.

Therefore, cryogenic sprays should be sampled very close to the atomizer orifice. In a cryogenic. Safe handling of cryogenic liquids General safety precautions For products covered in this Safetygram, many of the same safety precautions apply, whether the product is in the gas or liquid state.

Each cryogenic liquid has its own unique properties. Potential hazards stem from the following common properties: 1. All cryogenic liquids are.

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for liquid-jet breakup in high velocity gasflow. However, when the sprays were sampled farther downstream of the atomizer, at distances of x - and cm, the exponent for Wn decreased to andrespectively.

This was attributed to the loss of small droplets due to vaporization when values of x exceeded cm. NOMENCLATURE b c Dc D' c Di Dr. 5 D32 D31 k. Fluid thread breakup is the process by which a single mass of fluid breaks into several smaller fluid masses.

The process is characterized by the elongation of the fluid mass forming thin, thread-like regions between larger nodules of fluid. The thread-like regions continue to thin until they break, forming individual droplets of fluid. José M. Cerveró, José Nogareda, Eva M. Martín del Valle, Miguel A.

Galán. () Development of a technology to produce monodispersed microparticles based on the formation of drops from viscous non-Newtonian liquids sprayed through a fan jet atheizm.com by: Cryogenic liquids have very large expansion ratios, some as much as or more to one; they can form massive vapor clouds.

These vapor clouds can obscure vision of the source of the leak making. Cryogenic properties as density, boiling points and heat of evaporation for fluids like hydrogen, methane, oxygen, nitrogen, fluorine and helium Sponsored Links Cryogenic services involves the handling of liquefied gases like helium, hydrogen, methane, nitrogen, oxygen and fluorine in temperatures between o F to o F.

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Full text of "ICLASS". Air Liquide (Paris:AI) announced on Wednesday the signing of several contracts for the supply of cryogenic equipments for the propulsion of the future European launcher Ariane 6, as well as for the design and production of the cryogenic fluid systems of the new Ariane Launcher System (ELA4) of the Guiana Space Centre.

breakup. When those three-dimensional instability waves are amplified further downstream, the flow transits from laminar to turbulence. A cryogenic supercritical jet may undergo the same transitional process, but with additional mechanisms including volume dilation and baroclinic torque.

atomizer and grounded work piece. The charge transfers to the fluid and repulsive forces between the atomizer and the fluid tear the droplets from the atomizer and send them toward the work surface. See Figure 10 for an illustration of the concept of electrostatic atomization.

ATOMIZATION AND SPRAYS - ATOMIZATION SPRAYS http/atheizm.com Volume 13 Numbers 4( A TECHNIQUE FOR DROP SIZE. Perhaps the most important and widely-used fluids are liquefied natural gas or LNG (bp = boiling point about K), liquid oxygen (bp K) and liquid nitrogen (bp K).

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Numerical simulations of near-nozzle exit characteristics for an effervescent atomizer at low gas to liquid mass flow atheizm.com by: 1.Jul 23,  · Keynote: Is “DNS” Simulation of Spray Atomization Ebook for Prime Time?

(M. Soteriou) (Illinois Rm, 3rd floor) Session Chair: Vince McDonell Is “DNS” Simulation Of Spray Atomization Ready For Prime Time? Marios C. Soteriou.