Nozzle

About: Nozzle is a research topic. Over the lifetime, 158675 publications have been published within this topic receiving 893026 citations. The topic is also known as: spout.

Dispensing mixer for the storage and mixing of separate materials

Abstract: A portable dispensing mixer for intermixing and dispensing two contiguous streams of material in a preset volumetric ratio. The dispensing mixer includes a syringe with two compartments, discharge assembly for discharging material from the syringe and a nozzle assembly for dispensing the discharged material from a common nozzle. The nozzle assembly comprises a common nozzle, a static mixing element with an arm extending from one end and a head. The head has an end stop for stopping rotation of the arm. The mixing element is caused to rotate by the ingress of material fed through the nozzle until the arm hits the end stop.

What Determines the Drop Size in Sprays

Abstract: In many instances, sprays are formed from the breakup of liquid jets or sheets. We investigate the different parameters that determine the characteristic drop size in the breakup of sheets. We vary both the spraying parameters, such as the pressure and geometry of the nozzle, and the fluid parameters, such as viscosity and surface tension. The combined results show that the drop size is determined by a competition between fluid inertia and surface tension, which allows for the prediction of the drop size from the Weber number and geometry of the nozzle. Once rescaled with the average drop size, the size distribution is found to be described by a compound gamma distribution with two parameters, n and m, with the former setting the ligament corrugation and the latter the width of the ligament size distribution. Fit values for m indicate that nozzles of a conical type produce ligaments of almost equal size, while the flat fan nozzles produce broader distributed ligament sizes. Values for n show that, for all nozzles, ligaments are very corrugated, which is not unexpected for such spray formation processes. By using high-speed photography of the sprays, the parameters m and n can be directly measured and, indeed, govern the drop-size distribution.

Method and apparatus for lateral well drilling utilizing a rotating nozzle

Abstract: Method and apparatus for drilling into earth strata surrounding a well casing utilizing a rotating fluid discharge nozzle and reduction of static head pressure in the well casing in conjunction with the drilling operation.

High density gas jet nozzle design for laser target production

Abstract: The optimization of a cylindrical nozzle design to generate a uniform density profile for laser plasmas studies has been investigated using numerical simulations. In addition gas jet flows have been characterized using a Mach–Zehnder interferometer. The experimental results are in very good agreement with the simulation.

Effect of initial swirl distribution on the evolution of a turbulent jet

Abstract: An existing cold-jet facility at NASA Lewis Research Center was modified to produce swirling flows with controllable initial tangential velocity distribution. Distinctly different swirl velocity profiles were produced, and their effects on jet mixing characteristics were measured downstream of an 11.43 cm (4.5 in.) diameter convergent nozzle. It was experimentally shown that in the near field (i.e., x/D Q.6. This remarkable result leads to the conclusion that the integrated swirl effect, reflected in the swirl number, is inadequate in describing the mean swirling jet behavior in the near field. The relative size (i.e., diameter) of the vortex core emerging from the nozzle and the corresponding tangential velocity distribution are the controlling parameters influencing the swirling turbulent free-jet evolution.