2 edition of Some properties of sprays formed by the disintegration of a superheated liquid jet found in the catalog.
Some properties of sprays formed by the disintegration of a superheated liquid jet
W. L. Short
Written in English
|Statement||by W.L. Short.|
These studies proved that for a superheated spray, energy released from bubble burst due to a sudden pressure drop near the nozzle exit, which is transferred to the surrounding liquid, is therefore important in the production of new ligaments and yielding a disintegration of the jet, which would promote the breakup and atomization process of. One of the first application of thermography to disintegration studies was made by Yildiz et al. , who tried to characterise the thermal behaviour of a flashing jet through infrared imaging. However, due to the difficulties of calibrating the infrared camera and of determining the emissivity of the evaporating spray, only qualitative.
In vitro capsule disintegration/rupture times for empty capsules have been shown to be minutes for hard gelatin capsules (HGC) versus minutes for HPMC capsules in a range of media compositions (Ku et al., ).In vivo studies have suggested disintegration times in the range of minutes for HGC and minutes for HPMC capsules containing . they form a reticular structure in the spray leading to the disintegration into large droplets. Also, the spray shows in the form of liquid column or jet with a long breakup length of the film. It seems that vapor cavitation bubbles grow gradually inside the film due to some nuclei such as dissolved air in the fuel. As the back pressure is.
Earlier medical recipes, such as those from BC, were for liquid preparations rather than solids. The first references to pills were found on papyruses in ancient Egypt, and contained bread dough, honey or grease. Medicinal ingredients, such as plant powders or spices, were mixed in and formed by hand to make little balls, or pills. In the spray freezing section, laminar jet break-up of the liquid occurs using a droplet formation nozzle placed on the top of the chamber. The droplets are frozen while falling through the double walled cylindrical chamber cooled with gaseous and/or liquid nitrogen (− °C).
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Some Properties of Sprays Formed by the Disintegration of a Superheated Liquid Jet (Dissertation) [William L. Short] on *FREE* shipping on qualifying offers. Some Properties of Sprays Formed by the Disintegration of a Superheated Liquid Jet Author: William L.
Short. Some properties of sprays formed by the disintegration of a superheated liquid jet By William L. (William Leigh) Short Topics: Spraying., Atomization., Jets -- Fluid : William L.
(William Leigh) Short. Boiling is a liquid-to-vapor phase change process in which vapor bubbles are formed either on a heated surface or in a superheated liquid layer adjacent to the heat-transfer surface .
Boiling is distinguished from evaporation on a pre-existing liquid/gas surface or formation of cavitation with depressurization. To eliminate the effect of cavitation on the homogenous bubbling in the superheated liquid inside and the breakup of superheated liquid jet outside the nozzle, the flow velocity at the operating conditions were limited to such a low level as Reynolds number (Re) Cited by: The droplet measurement results showed a homogeneous droplet size distribution in the flashing spray due to the explosive disintegration of the superheated liquid jet.
View Show abstract. Zhang et al. [13, 14] studied the effect of bubble formation inside a slit nozzle on the external breakup process of a superheated liquid jet and claimed that bubble number density was the. High-speed liquid jets and sprays are complex multiphase flow phenomena with many important industrial applications1,2.
Great efforts have been devoted to understand their dynamics since the. ICLASS14th Triennial International Conference on Liquid Atomization and Spray Systems, Chicago, IL, USA, JulyDNS of Multiple Bubble Growth and Droplet Formation in Superheated Liquids D.
Loureiro 1, J. Reutzsch2, D. Dietzel,A. Kronenburg1, B. Weigand2, K. Vogiatzaki 3 1Institute for Combustion Technology, University of Stuttgart. book. The fourth conﬁguration is the break up of a liquid jet propelled through a nozzle into a gaseous atmosphere.
The unsteady, turbulent motions in the liquid (or the gas) generate ligaments of liquid that project into the gas and the breakup of these ligaments creates the spray. The jet.
In our experiment, a cylindrical liquid jet was injected into the air from a stainless steel needle of inner diameter mm, as sketched in Fig. 1(a).The cylindrical coordinate system (r, θ, z) is utilized to describe the problem, where r, θ, and z are the radial, azimuthal, and axial coordinates, needle was connected to a high-voltage dc electric source to charge the jet.
Capillarity is the familiar manifestation of the cohesion of liquids. Since Laplace (Traité de mécanique céleste, vol. IV, supplément au livre X: Sur l’action capillaire,pp.
1–65), we know that intense attractive forces between the molecules bridge the small with the large as they shape liquid/vapour interfaces at the macroscopic scale through the concept of surface. Brown R., York L. () Sprays formed by Flashing Liquid Jets; AIChE.
Journal Google Scholar Burry D., Bergeles G. () Dispersion of particles in anisotropic turbulent flows Int. Multiphase Flow, Vol. 19, No. 4, pp. – CrossRef zbMATH Google Scholar. The disintegration of liquid jets from a high pressure region to a small pres- () provided some results for the jet shape of ashing jets for propane re- Empirical models for the spray properties of superheated consider the ge.
Introduction. Liquid sprays and corresponding atomizing systems have many industrial applications. Delightful accounts of the earlier research work on liquid jet breakup phenomena and applications may be obtained from the comprehensive review of the literature [1–3].Whiles a seminal literature has been seen so far on the flow behavior and jet disintegration of heated.
High energy impingement of these jets results in the atomization of the liquid. The chapter provides the theory for the prediction of the sheet formed by the impingement of two jets, followed by estimates of droplet sizes based on the sheet thickness.
This chapter also provides information on the mixing processes in impinging jet nozzles. Short has written: 'Some properties of sprays formed by the disintegration of a superheated liquid jet' Asked in Units of Measure What is. The heat released when condensing steam can be expressed as. Q = h e M s (1).
where. Q = quantity of heat released (kJ, Btu) M s = mass of condensing steam (kg, lb). h e = specific evaporation enthalpy of steam (kJ/kg, Btu/lb). The heat transfer rate - or power - in a condensing steam flow can be expressed as. q = h e m s (2).
Characterization Tools. In order to characterize the sprays of the tested liquid, the input parameters like heating temperature, load pressure, and liquid flow rate were varied in steps; the corresponding spray parameters including the axial spray tip penetration, jet breakup mechanism, droplet size distribution, nozzle discharge coefficient, spray cone angle, spray.
The Effect of Nanoparticles on the Liquid–Gas Surface Tension of Bi2Te3 Nanofluids, Nanotechnology, vol. 20, no. 18,Zakaria, R., Jet Fuel Spray Characterization using Optical Methods: An Experimental Study of High Speed Fuel Injection Systems in Small Rotary Engines, PhD, University of Warwick, Spray drying is a well-known method of particle production which consists on the transformation of a fluid material into dried particles, taking advantage of a gaseous hot drying medium .Its first observation is dated and a primitive spray dryer device was patented by Samuel Percy in United States in [1, 2, 3].Ever since it was first discovered, the spray-drying technique.
their interaction with secondary droplets splashed from the liquid ﬁlm formed by preceding drops. In a study involving high-speed diesel sprays, Park and Lee  reported that the effect of impinge-ment is negligible at 10 mm separated from the wall and showed that the properties of drops in impinged sprays are related to those in free sprays.The hot water sprays are an important part of many industrial processes, where the detailed knowledge of physical phenomena involved in jet transportation, interaction, secondary breakup, evaporation, and coalescence of droplets is important to reach more efficient processes.
The objective of the work was to study the water spray jet breakup dynamics, vortex cloud .Atomization spray of non-Newtonian liquid plays a pivotal role in various engineering applications, especially for the energy utilization.
To operate spray systems efficiently and well understand the effects of liquid rheological properties on the whole spray process, a comprehensive model using Euler-Lagrangian approaches was established to simulate the evolution of the atomization spray .