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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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.
Without using a needle nozzle, a number of jets could be generated even from a widely open liquid surface.
Similar to the conical coil, the needle nozzle also gives concentrated field lines at its tip.
A similar concept using conjugated needle nozzles was proposed by Ali et al.
"We've engineered cells for grinding needle nozzles holding tolerances of 1.1 microns," Ueltschi says.