3 edition of Analytical description of the breakup of liquid jets in air found in the catalog.
Analytical description of the breakup of liquid jets in air
Published
1993
by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va
.
Written in
Edition Notes
| Statement | Demetrios T. Papageorgiou. |
| Series | ICASE report -- no. 93-45., NASA contractor report -- 191503., NASA contractor report -- NASA CR-191503. |
| Contributions | Langley Research Center. |
| The Physical Object | |
|---|---|
| Format | Microform |
| Pagination | 1 v. |
| ID Numbers | |
| Open Library | OL17679613M |
The liquid jet is produced using the pressure vessel shown in Figure 1. Prior to the experiment the vessel is filled with liquid and compressed gas. The pressure inside the vessel is monitored with a pressure gauge at the top of the cylinder. To start the flow of liquid, a remotely operated solenoid valve is opened. Air Bubble Entrainment, Breakup, and Interplay in Vertical Plunging Jets The entrainment, breakup, and interplay of air bubbles were observed in a vertical, two-dimensional supported jet at low impact velocities. Ultra-high-speed movies were ana-lyzed both qualitatively and quantitatively. The onset velocity of bubble entrainment was.
Liquid jet generation and breakup 5 where m is the droplet mass, u the uid velocity and D = ˇ 2 r2ˆ gCdjv uj: The coe cient Cd is the drag coe cient, and its value is given in the appendix. In order to give an explicit form of ˜ and QFile Size: 1MB. omization, a number of breakup models for liquid drops have been proposed and validated [1]. Us-ing these breakup models, there have been several attempts to simulate a liquid jet injected into a chamber by representing the liquid core by a col-lection of liquid drops. However, the results are easily changed by the initial drop size distribution.
Liquid jet breakup in homogeneous and isotropic turbulence without mean flow G. Charalampous, 1, P. Chounta, Y. Hardalupas1 1Mechanical Engineering Department, Imperial College London, London, SW7 2AZ, UK Abstract The breakup of a laminar water jet and the dispersion of produced droplets under the influence of homogeneous and. lowed by secondary atomization. The primary atomization is the initial breakup of the liquid jet into large and small liquid structures close to the injection nozzle. It involves complex interface topology of large coherent liquid structures. The secondary atomiza-tion is the subsequent breakup into smaller drops forming sprays. As distinct.
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Get this from a library. Analytical description of the breakup of liquid jets in air. [Demetrios T Papageorgiou; Langley Research Center.].
Breakup of liquid jets is a role in deciding the dynamics of the formation as well as breakup of liquid drops and jets. In the dripping regime, the growth and breakup rate of a drop are. The main parameters for the breaking modes are g and l the gas and liquid densities, the surface tension of the liquid, u g the velocity of the air flow, the viscosity of the liquid and D 0 the.
Breakup of liquid jets is a phenomenon related to this problem. When oil is spilled in the ocean, generally it spreads at the water surface and, depending on its density and composition it might migrate into the water or form a slick at the surface [1].Cited by: 3.
modern applications of the instability of sheets and jets, it is advantageous to hasten the breakup, but in other applications suppression of the breakup is essential. Hence knowledge of the physical mechanism of breakup, aside from its intrinsic scientific value, is very useful when one needs to exploit the phenomenon to the fullest extent.
work. The breakup and axis – switching phenomena have been studied for water jets emanating at low pres-sures from few psi to psi from non – circular ori-fices like rectangle, square and triangle and compared with the results obtained from a circular orifice.
The jets were discharged into quiescent air background. Book Description. The theme of this book is an exposition of what we know about the physicsunderlying the onset of instability in liquid sheets and jets.
Wave motionand breakup phenomena subsequent to the onset of instability are alsocarefully explained. Physical concepts are established through rigorousmathematics, accurate numerical analyses Cited by: The present study investigates the breakup length and liquid splatter onset point of circular air-assisted jets using nozzle diameters between mm and mm, which cover the range of useful sizes presented by Trainer et al.
Dimensional analysis is performed to identify the non-dimensional parameters which control the jet breakup by: 4. of the compound liquid jets. The in uence of gravity on the instability and breakup of inviscid and viscous compound jets is also considered. Additionally, we estimate the theoretical breakup lengths, breakup time and droplet sizes of such jets for varying key parameters.
This book, first published inis an exposition of what we knew about the physics underlying the onset of instability in liquid sheets and jets. Wave motion and breakup phenomena subsequent to the onset of instability are carefully by: ABSTRACT. An experimental investigation of primary breakup of nonturbulent round liquid jets in gas crossflows is described.
Pulsed shadowgraph measurements of jet primary breakup regimes, jet deformation properties, time of onset of primary breakup, and liquid column and liquid surface disturbance wavelengths were obtained for air crossflows at normal temperature and pressure.
Citation: Sallam, K. A.; Dai, Z.; Faeth, G. "Turbulent primary breakup of round and plane liquid jets in still air" AIAA, AIAA Aerospace Sciences Cited by: 1. Papageorgiou D.T. () Breakup of Cylindrical Jets Governed by the Navier-Stokes Equations.
In: Hussaini M.Y., Gatski T.B., Jackson T.L. (eds) Transition, Turbulence and Combustion. ICASE/LaRC Interdisciplinary Series in Science and Engineering, vol 2&: Demetrios T. Papageorgiou. 12th ICLASS empirical correlations for breakup length of liquid jet in uniform cross flow 2 mines penetration height at a location downstream of the injector.
The empirical correlations to predict the brea-kup length of liquid jet in cross flow has. Neal K. Nelson and John C. Berg, The effect of chemical reaction on the breakup of liquid jets, Chemical Engineering Science, 37, 7, (), ().
Crossref Scott Anderson and R.B. Page, Purification manufacturing and testing bi-component iodide pellets for metal halide lamps., Journal of Light & Visual Environment, 5, 1, (1), (). The axisymmetric, dynamic breakup of a Newtonian liquid jet injected vertically into another immiscible Newtonian liquid at various Reynolds numbers is investigated here.
The full transient from jet start‐up to breakup into drops was simulated numerically by solving the time‐dependent axisymmetric equations of motion and continuity using an algorithm based on the Volume of Cited by: The purpose of this investigation is to study the effect of the orifice geometry on liquid breakup.
In order to develop a better understanding of the liquid jet breakup, investigations were carried out in two steps—study of low-pressure liquid jet breakup and high-pressure fuel atomization. This paper presents the experimental investigations conducted to study the flow Cited by: Experimental Investigation of Liquid Jet Breakup at Low Weber Number.
Sucharitha Rajendran We have experimentally investigated breakup of round liquid jets the from nozzles with diameters ranging from mm to mm and jet Weber numbers from to 5 The breakup phenomena have been captured using a stagnant ambient air, if the File Size: KB.
In this paper, we study the breakup behavior of Newtonian liquid and non‐Newtonian liquid jets with an arbitrary variation surface tension imposed along its length.
The effect of duty cycle, fluid properties, and the various profiles of the surface tension is investigated. An Investigation into Methods to Control Breakup and Droplet Formation in Single and Compound Liquid Jets by Jamal Uddin A thesis submitted to The University of Birmingham B.1 A list of variables used to describe the breakup of a liquid jet with their dimensions.
Toward two-phase simulation of the primary breakup of a round liquid jet by a coaxial ow of gas By D. Kim, O. Desjardins, M. Herrmann AND P. Moin 1. Motivation and objectives Two-phase ows are very common in nature and technical processes such as ocean waves, tire splash, and combustion devices.
Among them, the atomization of liquid jets.ABSTRACT. Breakup of liquid jets issuing from converging (cone-up type) nozzles in a quiescent atmosphere is reviewed in the present paper. This review reveals that, in fact, very little is known about the influence of various factors on the disintegration of the jet.
The experimental breakup of liquid jets subjected to a sinusoidal perturbation is investigated in the Rayleigh and first wind-induced regimes. Stroboscopic illumination of the jet and laser photometry method are used. The ability of linear spatial and temporal theories to describe certain aspects of the phenomenon is by:
