needle nozzle

needle nozzle

[′nēd·əl ‚näz·əl]
(mechanical engineering)
A streamlined hydraulic turbine nozzle with a movable element for converting the pressure and kinetic energy in the pipe leading from the reservoir to the turbine into a smooth jet of variable diameter and discharge but practically constant velocity.
References in periodicals archive ?
However, the drop formation frequency was decreased by electrospinning with the smallest needle nozzle diameters of 20G, as shown in Fig.
The accessories--which store in the handle--include a valve adapter with pressure gauge for tires, a needle nozzle for balls, and a tapered nozzle for various rafts and floats.
In addition, using gas jacket was reported to enhance the processing ability of single needle nozzle (7), The gas jacket, however, influences the nanofiber morphology and fineness.
Without using a needle nozzle, a number of jets could be generated even from a widely open liquid surface.