Log in

Relevant bibliographies by topics / Sprays from coaxial atomizers / Journal articles

To see the other types of publications on this topic, follow the link: Sprays from coaxial atomizers.

Journal articles on the topic 'Sprays from coaxial atomizers'

Author: Grafiati

Published: 6 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 44 journal articles for your research on the topic 'Sprays from coaxial atomizers.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hardalupas, Y., and J. H. Whitelaw. "Interaction Between Sprays From Multiple Coaxial Airblast Atomizers." Journal of Fluids Engineering 118, no. 4 (1996): 762–71. http://dx.doi.org/10.1115/1.2835507.

Full text

Abstract:

Phase Doppler measurements of size, velocity, liquid flux, and average mass fractions were obtained in sprays produced by three identical coaxial airblast atomizers, with their axes placed in a triangular arrangement at distances of two air jet diameters from each other; the arrangement simulates the spray interaction in the preburner of the space shuttle main engine with water and air respectively replacing the liquid oxygen and hydrogen of the preburner sprays. Each nozzle comprised a liquid jet with exit diameter of 2.3 mm centred in a 8.95 mm diameter air stream. Two liquid flowrates were

APA, Harvard, Vancouver, ISO, and other styles

2

Utepov, Burxon, Tuygun Khaydarov, Nurmamat Rajabov, Gulnoza Murtazayeva, Bakhtiyor Tulaganov, and Mirzoolim Avliyakulov. "Experimental studies of frequency of rotation of smooth rotating disk with coaxial-lateral air flow." E3S Web of Conferences 365 (2023): 04018. http://dx.doi.org/10.1051/e3sconf/202336504018.

Full text

Abstract:

The article presents methods for determining the main parameters of a rotating atomizer sprayer. The choice of research methodology is justified based on the general pattern of liquid atomization by rotating atomizers, taking into account the influence of the air flow on them. The main indicators affecting the sprayed drops' dispersal are the air flow rate and the rotational speed of the pneumatic disk atomizer. Therefore, the correct choice of the method for determining the rotational speed ω of a pneumatic disk atomizer makes it possible, at a constant air flow rate, to obtain the required m

APA, Harvard, Vancouver, ISO, and other styles

3

Eroglu, H., and N. Chigier. "Initial Drop Size and Velocity Distributions for Airblast Coaxial Atomizers." Journal of Fluids Engineering 113, no. 3 (1991): 453–59. http://dx.doi.org/10.1115/1.2909517.

Full text

Abstract:

Initial drop size and velocity distributions, after complete disintegration of coaxial liquid jets, were determined by phase Doppler measurements. The measured radial distributions of Sauter mean diameter (SMD) were compared with the photographs of the disintegrating liquid jet. The SMD distribution was found to be strongly affected by the structure and behavior of the preceding liquid intact jet. The results showed that SMD increases with increasing liquid supply pressure as well as with decreasing air supply pressure. The axial measurement stations were determined from the photographs of the

APA, Harvard, Vancouver, ISO, and other styles

4

Zhang, Feichi, Simon Wachter, Thorsten Zirwes, et al. "Effect of nozzle upscaling on coaxial, gas-assisted atomization." Physics of Fluids 35, no. 4 (2023): 043302. http://dx.doi.org/10.1063/5.0141156.

Full text

Abstract:

Mass flow scaling of gas-assisted coaxial atomizers from laboratory to industrial scale is of major interest for a wide field of applications. However, there is only scarce knowledge and research concerning the effect of atomizer scale-up on liquid breakup and spray characteristics. The main objective of this study is therefore to derive basic principles for liquid jet breakup using upscaled nozzles to increase the liquid mass flow rate [Formula: see text]. For that purpose, atomizers with the same geometrical setup but increased sizes have been designed and experimentally investigated for [Fo

APA, Harvard, Vancouver, ISO, and other styles

5

Sivakumar, D., and B. N. Raghunandan. "Hysteretic interaction of conical liquid sheets from coaxial atomizers: Influence on the spray characteristics." Physics of Fluids 10, no. 6 (1998): 1384–97. http://dx.doi.org/10.1063/1.869663.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Lefebvre, A. "Discussion: “Interaction Between Sprays From Multiple Coaxial Airblast Atomizers” (Hardalupas, Y., and Whitelaw, J. H., 1996, ASME J. Fluids Eng., 118, pp. 762–771)." Journal of Fluids Engineering 118, no. 4 (1996): 645–46. http://dx.doi.org/10.1115/1.2835489.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Hardalupas, Y., and J. H. Whitelaw. "Characteristics of sprays produced by coaxial airblast atomizers." Journal of Propulsion and Power 10, no. 4 (1994): 453–60. http://dx.doi.org/10.2514/3.23795.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Hallstrom, Anders, and Jeffrey B. Danner. "SPRAYS FROM NOZZLES AND ROTARY ATOMIZERS." Atomization and Sprays 4, no. 3 (1994): 263–73. http://dx.doi.org/10.1615/atomizspr.v4.i3.20.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Gavaises, M., and C. Arcoumanis. "Modelling of sprays from high-pressure swirl atomizers." International Journal of Engine Research 2, no. 2 (2001): 95–117. http://dx.doi.org/10.1243/1468087011545370.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Tratnig, Andreas, and Günter Brenn. "Drop size spectra in sprays from pressure-swirl atomizers." International Journal of Multiphase Flow 36, no. 5 (2010): 349–63. http://dx.doi.org/10.1016/j.ijmultiphaseflow.2010.01.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Eroglu, Hasan, and Norman Chigier. "WAVE CHARACTERISTICS OF LIQUID JETS FROM AIRBLAST COAXIAL ATOMIZERS." Atomization and Sprays 1, no. 4 (1991): 349–66. http://dx.doi.org/10.1615/atomizspr.v1.i4.10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Sankar, S. V., K. E. Maher, D. M. Robart, and W. D. Bachalo. "Rapid Characterization of Fuel Atomizers Using an Optical Patternator." Journal of Engineering for Gas Turbines and Power 121, no. 3 (1999): 409–14. http://dx.doi.org/10.1115/1.2818488.

Full text

Abstract:

Planar laser scattering (PLS) and planar laser-induced fluorescence (PLIF) techniques are currently being used for rapid characterization of fuel sprays associated with gas turbine atomizers, diesel injectors, and automotive fuel injectors. These techniques can be used for qualitative, quantitative, and rapid measurement of fuel mass, spray geometry, and Sauter mean diameters in various sprays. The spatial distribution of the fuel mass can be inferred directly from the PLIF image, and the Sauter mean diameter can be measured by simultaneously recording the PLIF and PLS images and then ratioing

APA, Harvard, Vancouver, ISO, and other styles

13

Kumar, Abhijeet, and Srikrishna Sahu. "Liquid jet breakup unsteadiness in a coaxial air-blast atomizer." International Journal of Spray and Combustion Dynamics 10, no. 3 (2018): 211–30. http://dx.doi.org/10.1177/1756827718760905.

Full text

Abstract:

The aim of this paper is to experimentally characterize the liquid jet breakup unsteadiness in a coaxial air-blast atomizer. The current research focuses on the measurement of the fluctuations of the jet breakup length and the flapping instability of the liquid jet, which contribute to the downstream fluctuations of the spray characteristics. The optical connectivity technique was used to measure the instantaneous breakup length of the water jet. Also, time resolved shadowgraph images of the primary jet breakup process were captured by high-speed imaging to characterize the jet instabilities a

APA, Harvard, Vancouver, ISO, and other styles

14

Dodge, L. G., and J. A. Biaglow. "Effect of Elevated Temperature and Pressure on Sprays From Simplex Swirl Atomizers." Journal of Engineering for Gas Turbines and Power 108, no. 1 (1986): 209–15. http://dx.doi.org/10.1115/1.3239873.

Full text

Abstract:

The effects of air temperature and air pressure on spray quality of a moderately high capacity pressure swirl atomizer (127 kg/h MPa or 23.3 lbm/h psid) spraying jet-A and No. 2 diesel fuel have been examined. Drop-size distributions, in terms of both Sauter mean diameter (SMD) and the width of the distribution as given by the Rosin-Rammler N parameter, and cone angle as measured close to the nozzle (10-mm distance) have been determined over a variety of air conditions. A new correction procedure was developed to extend diffraction-based drop-size measurements in dense sprays from maximum opti

APA, Harvard, Vancouver, ISO, and other styles

15

Zheng, Zekun, and Yong Huang. "INVESTIGATION ON THE INTERACTION AMONG MULTI-SPRAYS GENERATED FROM PRESSURE-SWIRL ATOMIZERS." Atomization and Sprays 27, no. 6 (2017): 477–91. http://dx.doi.org/10.1615/atomizspr.2017018229.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

MACKRORY, ANDREW J., DALE R. TREE, and LARRY L. BAXTER. "Characteristics of black liquor sprays from gas-assisted atomizers in high-temperature environments." January 2008 7, no. 1 (2008): 19–23. http://dx.doi.org/10.32964/tj7.1.19.

Full text

Abstract:

Black liquor droplets in an entrained-flow gasifier that are too large or too small can cause problems in the chemical recovery process. It is therefore important in gasifier design to understand the nature of the atomized gas spray. We used high-speed imaging to study black liquor sprays in cold and hot environments. Significant conclusions are that: 1. the droplet size distribution width is linked to the mean droplet size as for other sprays in the literature, necessitating a gasifier design that is tolerant of the distribution width associated with the target droplet size; 2. the shape of b

APA, Harvard, Vancouver, ISO, and other styles

17

Nasr, G. G., R. A. Sharief, and A. J. Yule. "High Pressure Spray Cooling of a Moving Surface." Journal of Heat Transfer 128, no. 8 (2005): 752–60. http://dx.doi.org/10.1115/1.2217747.

Full text

Abstract:

A novel technique is described for investigating spray cooling of moving hot surfaces. An experimental investigation is described for vertically downwards water sprays impinging on a horizontal steel annulus of 250mm diameter with a surface temperature up to 600°C, and rotating at up to 120rpm, giving a tangential velocity of 1.35ms−1. The central homogeneous zones of sprays from full-cone atomizers are used at pressures up to 2.07MPa and the ranges of impacting spray parameters are 0.98to12.5kgm−2s−1 for mass flux, 49-230μm for volume median drop diameter, and 9.8-32.3ms−1 for impinging veloc

APA, Harvard, Vancouver, ISO, and other styles

18

Cui, Chengsong, Alwin Schulz, and Volker Uhlenwinkel. "Co-Spray Forming of Gradient Deposits from Two Sprays of Different Tool Steels Using Scanning Gas Atomizers." steel research international 84, no. 11 (2013): 1075–84. http://dx.doi.org/10.1002/srin.201200266.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Ghaffar, Zulkifli Abdul, Salmiah Kasolang, and Ahmad Hussein Abdul Hamid. "Characteristics of Swirl Effervescent Atomizer Spray Angle." Applied Mechanics and Materials 607 (July 2014): 108–11. http://dx.doi.org/10.4028/www.scientific.net/amm.607.108.

Full text

Abstract:

In the application of sprays produced by an atomizer, spray angle is one of key performance parameters. A larger spray angle is often required in providing a better spray dispersion. Swirl effervescent atomizer is one of the existing atomizers with the capability to produce a large spray angle. The formation of spray angle from this atomizer however is hardly understood. A newly-designed swirl effervescent atomizer was developed and tested with different swirl-generating vane angle in order to understand the swirl intensity effect on the spray angle. Experiments were carried out based on a col

APA, Harvard, Vancouver, ISO, and other styles

20

Hassani, Mohammad Amin, Abbas Elkaie, and Maziar Shafaee. "Numerical investigation of the full-cone spray structure and characteristics provided by a jet-swirl atomizer." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 15 (2019): 5788–800. http://dx.doi.org/10.1177/0954410019860320.

Full text

Abstract:

Jet-swirl atomizers are one of the pressure-swirl atomizers that produce full-cone spray. Although many hollow-cone pressure-swirl sprays have been studied, characteristic investigation of pressure-swirl full-cone sprays are limited to a few experimental, analytical, and numerical works where each of them investigate some of the main spray parameters. The few existing numerical studies are limited to calculate the coefficient of discharge and spray cone angle. Current numerical study investigate a newly developed jet-swirl atomizer with pressure-swirl full-cone spray, which considers other imp

APA, Harvard, Vancouver, ISO, and other styles

21

Tsai, S. C., and B. Viers. "Airblast Atomization of Viscous Newtonian Liquids Using Twin-Fluid Jet Atomizers of Various Designs." Journal of Fluids Engineering 114, no. 1 (1992): 113–18. http://dx.doi.org/10.1115/1.2909985.

Full text

Abstract:

Airblast atomization of viscous Newtonian liquids is carried out using coaxial twin-fluid jet atomizers of different nozzle sizes, slit angles, and slit cross sections for air flow. As the atomizing air swirls downstream along the liquid jet, waves form on the surface of the liquid jet. As a result, the liquid jet sheds ligaments which rapidly collapse into small drops. The atomized drop sizes can be described in terms of three dimensionless groups, namely, liquid-to-air mass ratio (M˙L/M˙A), Weber number (We), and Ohnesorge number (Z) in simple forms whose exponents and coefficients are deter

APA, Harvard, Vancouver, ISO, and other styles

22

Seredyn, Tomasz, Adam Dziubiński, and Piotr Jaśkowski. "CFD Analysis of the Fluid Particles Distribution by Means of Aviation Technique." Transactions on Aerospace Research 2018, no. 1 (2018): 67–97. http://dx.doi.org/10.2478/tar-2018-0006.

Full text

Abstract:

Abstract The article describes a computational study, using CFD models, of droplet spray dispersal in the wake of a ‘Turbo Kruk’ airplane up to 500 m downstream. The CFD Reynolds-averaged Navier-Stokes (RANS) models use a Lagrangian (droplet phase) and Eulerian (fluid phase) procedure to predict the droplet trajectories trough the turbulent aircraft wake. The methods described in the work have the potential to improve current models for aerial spraying and will help in the development of new spraying procedures. In this study, the CFD models are used to describe the phenomenon of sprays releas

APA, Harvard, Vancouver, ISO, and other styles

23

Wilson, AGL, LA Harper, and H. Baker. "Evaluation of insecticide residues and droplet drift following aerial application to cotton in New South Wales." Australian Journal of Experimental Agriculture 26, no. 2 (1986): 237. http://dx.doi.org/10.1071/ea9860237.

Full text

Abstract:

In a study to determine the extent of off target drift from aerial spraying, insecticides were applied to cotton crops in various strengths of crosswind by an aircraft fitted with rotary atomizers. Both water-based and oil-based sprays were applied, at 20 and 2 litres/ha respectively. Compared with the mean insecticide deposit across a 16-m target swath, in seven runs, the mean recoveries of insecticide 15, 165 and 3 15 m downwind from the edge of the swath were 6.8, 0.13 and 0.002% respectively. Deposition on plants was nearly twice that on the ground, but the proportional decline downwind wa

APA, Harvard, Vancouver, ISO, and other styles

24

Shi, H., and C. Kleinstreuer. "Simulation and Analysis of High-Speed Droplet Spray Dynamics." Journal of Fluids Engineering 129, no. 5 (2006): 621–33. http://dx.doi.org/10.1115/1.2717621.

Full text

Abstract:

An experimentally validated computer simulation model has been developed for the analysis of gas-phase and droplet characteristics of isothermal sprays generated by pressure jet atomizers. Employing a coupled Euler-Lagrange approach for the gas-droplet flow, secondary droplet breakup (based on the ETAB model), was assumed to be dominant and the k-ε model was selected for simulating the gas flow. Specifically, transient spray formation in terms of turbulent gas flow as well as droplet velocities and size distributions are provided for different back pressures. Clearly, two-way coupling of the p

APA, Harvard, Vancouver, ISO, and other styles

25

Sivakumar, D., and B. N. Raghunandan. "A Study on Converging Thin Annular Jets." Journal of Fluids Engineering 119, no. 4 (1997): 923–28. http://dx.doi.org/10.1115/1.2819518.

Full text

Abstract:

An interesting feature of jets from liquid-liquid coaxial swirl atomizers used in bipropellant rockets or elsewhere is that the outer jet results in a tulip shaped liquid bulb even at operating pressure levels. In this context, experiments have been performed to study the discharge and tulip characteristics of annular jets through qualitative simulation of outer jet flow conditions at which tulip bulb prevails. It is shown that the discharge coefficient increases steeply with Reynolds number, a trend which is distinct from that of circular orifices. The range of flow conditions at which tulip

APA, Harvard, Vancouver, ISO, and other styles

26

Dhivyaraja, K., D. Gaddes, E. Freeman, S. Tadigadapa, and M. V. Panchagnula. "Dynamical similarity and universality of drop size and velocity spectra in sprays." Journal of Fluid Mechanics 860 (December 7, 2018): 510–43. http://dx.doi.org/10.1017/jfm.2018.893.

Full text

Abstract:

Sprays are a class of multiphase flows which exhibit a wide range of drop size and velocity scales spanning several orders of magnitude. The objective of the current work is to experimentally investigate the prospect of dynamical similarity in these flows. We are also motivated to identify a choice of length and time scales which could lead towards a universal description of the drop size and velocity spectra. Towards this end, we have fabricated a cohort of geometrically similar pressure swirl atomizers using micro-electromechanical systems (MEMS) as well as additive manufacturing technology.

APA, Harvard, Vancouver, ISO, and other styles

27

Ghate, Kushal, and Thirumalachari Sundararajan. "Effects of orifice divergence on hollow cone spray at low injection pressures." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 11 (2018): 4091–105. http://dx.doi.org/10.1177/0954410018813432.

Full text

Abstract:

In this work, the effects of orifice divergence on spray characteristics have been reported. Parameters such as spray cone angle, liquid sheet thickness, coefficient of discharge, break-up length, and Sauter mean diameter are greatly affected by the half divergence angle [Formula: see text] at orifice exit. An experimental investigation is carried out in which water sprays from five atomizers having half divergence angle values of 0°, 5°, 10°, 15°, and 20° are studied at different injection pressures. Image processing techniques are used to measure spray cone angle and break-up length from spr

APA, Harvard, Vancouver, ISO, and other styles

28

Wofford, J. T., R. G. Luttrell, and D. B. Smith. "Effects of Droplet Characteristics of Permethrin Sprays Applied in Vegetable Oil and Water on Control of Heliothis Spp. in Cotton; 1984." Insecticide and Acaricide Tests 11, no. 1 (1986): 306–7. http://dx.doi.org/10.1093/iat/11.1.306.

Full text

Abstract:

Abstract A small plot field study was conducted on the Plant Science Research Farm of the Mississippi Agriculture and Forestry Experiment Station, Mississippi State, MS, to determine if insecticide carriers (vegetable oil and water) and droplet characteristics (droplet size and droplet concentration) influence control of Heliothis spp. in cotton. Four-row plots (3.87 m × 15.24 m) with 10-row buffers were planted to ‘Stoneville 825’ on 15 May and 1 Jun (2 replications required replanting) in a randomized complete block design. Vegetable oil treatments were varied by manipulating droplet size wi

APA, Harvard, Vancouver, ISO, and other styles

29

Hoffmann, Wesley Clint, Bradley Keith Fritz, Muhammad Farooq, et al. "Evaluation of Aerial Spray Technologies for Adult Mosquito Control Applications." Journal of Plant Protection Research 53, no. 3 (2013): 222–29. http://dx.doi.org/10.2478/jppr-2013-0034.

Full text

Abstract:

Abstract Spray droplet size has long been recognized as an important variable that applicators of vector control sprays must be aware of to make the most effective spray applications. Researchers and applicators have several different techniques available to assess spray droplet size from spray nozzles. The objective of this study was to compare the droplet size spectrum produced by three nozzles commonly used in vector control in a high-speed wind tunnel, when characterized using three different laser-based droplet size measurement systems. Three droplet sizing systems: Malvern Spraytec laser

APA, Harvard, Vancouver, ISO, and other styles

30

Potier, Luc, Florent Duchaine, Bénédicte Cuenot, Didier Saucereau, and Julien Pichillou. "Prediction of Wall Heat Fluxes in a Rocket Engine with Conjugate Heat Transfer Based on Large-Eddy Simulation." Entropy 24, no. 2 (2022): 256. http://dx.doi.org/10.3390/e24020256.

Full text

Abstract:

Although a lot of research and development has been done to understand and master the major physics involved in cryogenic rocket engines (combustion, feeding systems, heat transfer, stability, efficiency, etc.), the injection system and wall heat transfer remain critical issues due to complex physics, leading to atomization in the subcritical regime and the interactions of hot gases with walls. In such regimes, the fuel is usually injected through a coaxial annulus and triggers the atomization of the central liquid oxidizer jet. This type of injector is often referred to as air-assisted, or co

APA, Harvard, Vancouver, ISO, and other styles

31

Lapeña, José Florencio F. "Primary Care Evaluation of the Nose and Paranasal Sinuses." Philippine Journal of Otolaryngology-Head and Neck Surgery 21, no. 1-2 (2006): 57–58. http://dx.doi.org/10.32412/pjohns.v21i1-2.847.

Full text

Abstract:

Primary care evaluation of the nose and paranasal sinuses begins with inspection. The astute clinician will seldom miss the hyperemic nose and open-mouth breathing of nasal congestion, the “long-face” facies, infraorbital dark “shiners” and edema of decreased lymphatic drainage from chronic nasal obstruction, and the transverse nasal crease from repeated performance of the “allergic salute” in allergic rhinitis. Tearing may be caused by inferior obstruction of the nasolacrimal duct. Widening of the nasal bridge (Woake’s syndrome) may suggest massive nasal polyposis2. The patient with acute sin

APA, Harvard, Vancouver, ISO, and other styles

32

Joseph, A., R. Sakthikumar, and D. Sivakumar. "Experimental Characterization of Sprays in a Recessed Gas-Centered Swirl Coaxial Atomizer." Journal of Fluids Engineering 142, no. 4 (2020). http://dx.doi.org/10.1115/1.4045986.

Full text

Abstract:

Abstract The characteristics of sprays from a recessed gas-centered swirl coaxial atomizer (RGCSCA) with gas to liquid momentum flux ratio, J of the spray in the range of 2–66 are studied experimentally through the analysis of spray morphologies and droplets characteristics. The process of fully developed spray (spray free from ligaments/droplets clusters and nonspherical droplets) in the atomizer is quantified. In the RGCSCA, the distance from the atomizer exit to the fully developed spray zone decreases with increase in J. Detailed measurements of size (in the range of 6–378 μm) and velocity

APA, Harvard, Vancouver, ISO, and other styles

33

Kulkarni, V., D. Sivakumar, C. Oommen, and T. J. Tharakan. "Liquid Sheet Breakup in Gas-Centered Swirl Coaxial Atomizers." Journal of Fluids Engineering 132, no. 1 (2010). http://dx.doi.org/10.1115/1.4000737.

Full text

Abstract:

The study deals with the breakup behavior of swirling liquid sheets discharging from gas-centered swirl coaxial atomizers with attention focused toward the understanding of the role of central gas jet on the liquid sheet breakup. Cold flow experiments on the liquid sheet breakup were carried out by employing custom fabricated gas-centered swirl coaxial atomizers using water and air as experimental fluids. Photographic techniques were employed to capture the flow behavior of liquid sheets at different flow conditions. Quantitative variation on the breakup length of the liquid sheet and spray wi

APA, Harvard, Vancouver, ISO, and other styles

34

"Breakup phenomena in coaxial airblast atomizers." Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences 451, no. 1941 (1995): 189–229. http://dx.doi.org/10.1098/rspa.1995.0123.

Full text

Abstract:

The breakup of a liquid jet with length-to-diameter ratio of 22 surrounded by a coaxial flow of air has been examined by a combination of high-speed photography and phase-Doppler velocimetry. The air-to-liquid momentum and kinetic energy ratios, the Reynolds number of the coaxial water and air jet flows and the exit-plane Weber number have been varied over extensive ranges and the results examined in terms of the breakup length, frequency, droplet size distributions and velocity characteristics. The photographs reveal the deterministic nature of the liquid flow at Reynolds numbers which are su

APA, Harvard, Vancouver, ISO, and other styles

35

Broumand, Mohsen, Murray Thomson, Sean Yun, and Zekai Hong. "Spray Characterization of a Preheated Bio-Oil Surrogate at Elevated Pressures." Journal of Engineering for Gas Turbines and Power, August 26, 2022. http://dx.doi.org/10.1115/1.4055360.

Full text

Abstract:

Abstract Atomization plays an important role in the gasification or combustion of bio-oils, where the atomizer parameters need to be properly controlled to efficiently atomize a highly viscous liquid at elevated pressures with imparting the least amount of kinetic energy to the discharged droplets because of evaporation and chemical reaction constraints. With a focus on bio-oil deployments in micro gas turbines, an aqueous surrogate of a preheated bio-oil injected from a twin-fluid atomizer is used in the present study for spray size and velocity measurements at elevated pressures. The experim

APA, Harvard, Vancouver, ISO, and other styles

36

Godavarthi, V., K. Dhivyaraja, R. I. Sujith, and M. V. Panchagnula. "Analysis and classification of droplet characteristics from atomizers using multifractal analysis." Scientific Reports 9, no. 1 (2019). http://dx.doi.org/10.1038/s41598-019-52596-6.

Full text

Abstract:

Abstract Atomizers find applications in diverse fields such as agriculture, pharmaceutics and combustion. Among the most commonly found atomizer classes of designs are pressure swirl, airblast and ultrasonic atomizers. However, it has thus far not been possible to identify the class of an atomizer from spray characteristics. We perform multifractal detrended fluctuation analysis on the droplet inter-arrival times, diameters and axial velocities of pressure swirl, airblast and ultrasonic nebulizer sprays to quantify the differences in complexity in the respective signals. We show that the width

APA, Harvard, Vancouver, ISO, and other styles

37

Fong, Kee Onn, Xinzhi Xue, R. Osuna-Orozco, and A. Aliseda. "Two-fluid coaxial atomization in a high-pressure environment." Journal of Fluid Mechanics 946 (August 1, 2022). http://dx.doi.org/10.1017/jfm.2022.586.

Full text

Abstract:

We study the dynamics of atomization of a liquid column by a coaxial gas flow with varying gas pressures. Specifically, we analyse how the gas density increase associated with elevated gas pressures in the ambient and co-flowing gas jet influences the liquid destabilization and breakup process, as well as the resulting droplet formation and dispersion. We present new experimental results for a coaxial liquid–gas atomizer operating in a high-pressure environment, with gas–liquid momentum ratio in the range $M = 5\unicode{x2013}56$ and pressurized gas densities $\rho _g/\rho _0 = 1\unicode{x2013

APA, Harvard, Vancouver, ISO, and other styles

38

Bothell, Julie K., Timothy B. Morgan, and Theodore J. Heindel. "Image-Based Feedback Control for a Coaxial Spray." Journal of Fluids Engineering 142, no. 11 (2020). http://dx.doi.org/10.1115/1.4048131.

Full text

Abstract:

Abstract Optimization of jet engine sprays has the potential to improve efficiency and reduce environmental impact. Sprays can be continually optimized in multivariate scenarios using real-time feedback control, but a method of controlling the sprays based on physical properties must first be established. In this study, a spray controller was developed to optimize the spray angle obtained from shadowgraphs, with the assumption that the largest angle is desired. The spray angle was used as an example, as it is a physically important parameter which is easily found through shadowgraph imaging. V

APA, Harvard, Vancouver, ISO, and other styles

39

Escobar-Vargas, Sergio, Jorge E. Gonzalez, Drazen Fabris, Ratnesh Sharma, and Cullen Bash. "High Heat Flux With Small Scale Monodisperse Sprays." Journal of Heat Transfer 134, no. 12 (2012). http://dx.doi.org/10.1115/1.4006486.

Full text

Abstract:

This work is aimed at cooling small surfaces (1.3 mm × 2 mm and 3 mm × 5 mm) using spray from thermal ink jet (TIJ) atomizers. Particular interests in this work include obtaining heat fluxes near the critical heat flux (CHF), understanding the correlation between the heat dissipation efficiency (η) and the liquid film thickness (δ) through experimental data, and understanding the primary mode of heat transfer on spray cooling at different liquid film thickness. Current experimental results indicate that high heat fluxes (∼4 × 107 W/m2) are obtained for controlled conditions of cooling mass flo

APA, Harvard, Vancouver, ISO, and other styles

40

Nakamura, Sosuke, Vince McDonell, and Scott Samuelsen. "The Effect of Liquid-Fuel Preparation on Gas Turbine Emissions." Journal of Engineering for Gas Turbines and Power 130, no. 2 (2008). http://dx.doi.org/10.1115/1.2771564.

Full text

Abstract:

The emissions of liquid-fuel fired gas turbine engines are strongly affected by the fuel preparation process that includes atomization, evaporation, and mixing. In the present paper, the effects of fuel atomization and evaporation on emissions from an industrial gas turbine engine were investigated. In the engine studied, the fuel injector consists of a coaxial plain jet airblast atomizer and a premixer which consists of a cylindrical tube with four mixing holes and swirler slits. The goal of this device is to establish a fully vaporized, homogeneous fuel/air mixture for introduction into the

APA, Harvard, Vancouver, ISO, and other styles

41

Liang, Yifan, Lars Christian Johansen, and Mark Linne. "Characteristics of sprays produced by coaxial non-swirling and swirling air-water jets with high aerodynamic Weber numbers." Physics of Fluids, September 14, 2022. http://dx.doi.org/10.1063/5.0107480.

Full text

Abstract:

This paper describes part of an experimental study on shear-based spray formation. A laminar liquid jet was ejected inside co-annular non-swirling and swirling air streams. The aerodynamic Weber numbers (We_A) and swirl numbers (S) of the flow cases ranged from 256 to 1426 and from 0 to 3.9, respectively. The aim of this paper is to investigate how S and We_A influence the breakup of a central laminar liquid jet within the fiber-type atomization regime. High-speed shadowgraphy was utilised to visualise the spray behaviour, while Phase Doppler Interferometry (PDI) was utilised to measure the dr

APA, Harvard, Vancouver, ISO, and other styles

42

Fisher, Brian T., Michael R. Weismiller, Steven G. Tuttle, and Katherine M. Hinnant. "Effects of Fluid Properties on Spray Characteristics of a Flow-Blurring Atomizer." Journal of Engineering for Gas Turbines and Power 140, no. 4 (2017). http://dx.doi.org/10.1115/1.4038084.

Full text

Abstract:

In order to understand the reasons for the apparent benefits of using a flow-blurring (FB) atomizer in a combustion system, it is necessary to first examine fundamental spray characteristics under nonreacting conditions. Previous work on FB atomizers, however, has mostly involved only water and a relatively narrow range of parameters. In this study, a phase Doppler anemometry (PDA) instrument was used to characterize FB atomizer sprays and determine the effects of varying surface tension and viscosity of the liquid. Operating at room pressure and temperature (i.e., a “cold spray”), droplet siz

APA, Harvard, Vancouver, ISO, and other styles

43

Sahoo, Santanu Kumar, Hrishikesh Gadgil, Sudarshan Kumar, and K. S. Biju Kumar. "Spatio-Temporal Analysis of a Self-Pulsating Gas-Centered Swirl Coaxial Injector with Forced Gas Jet." AIAA Journal, April 16, 2023, 1–14. http://dx.doi.org/10.2514/1.j062402.

Full text

Abstract:

The objective of the present work is to examine the effects of the acoustically forced gas jet on self-pulsating sprays generated from a gas-centered swirl coaxial injector. We conduct the experiments on self-pulsating spray by forcing the gas jet over a range of forcing frequencies and amplitudes. Various image processing techniques, including proper orthogonal decomposition (POD), have been employed to characterize the spray response. Our spatial mapping of dominant frequencies from time-resolved spray width reveals that although both natural and forcing frequencies prevail in the primary br

APA, Harvard, Vancouver, ISO, and other styles

44

Strasser, Wayne, and Francine Battaglia. "The Influence of Retraction on Three-Stream Injector Pulsatile Atomization for Air–Water Systems." Journal of Fluids Engineering 138, no. 11 (2016). http://dx.doi.org/10.1115/1.4033421.

Full text

Abstract:

Although coaxial airblast primary atomization has been studied for decades, relatively little attention has been given to three-stream designs; this is especially true for transonic self-pulsating injectors. Herein, the effects of nozzle geometry, grid resolution, modulation, and gas flow rate on the acoustics and spray character within an industrial scale system were investigated computationally using axisymmetric (AS) and three-dimensional (3D) models. Metrics included stream pressure pulsations, spray lift-off, spray angle, and primary droplet length scale, along with the spectral alignment

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!