Topic
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.
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Patent•
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26 Nov 1997
TL;DR: In this paper, a hot runner nozzle structure provides insulation to reduce heat transfer to a utilizing tool and to increase accuracy of temperature measurement and control, and a shaft foot of extremely low heat conductivity is used to separate a point of contact between a feed tube shaft and the tool.
Abstract: A hot runner nozzle structure provides insulation to reduce heat transfer to a utilizing tool and to increase accuracy of temperature measurement and control. A shaft foot of extremely low heat conductivity is used to separate a point of contact between a feed tube shaft and the tool. The shaft foot may be formed of titanium for example. An insulating cap of extremely low heat conductivity is surrounds the shaft foot in the vicinity of the nozzle tip. The cap may be formed of PEEK or of titanium for example. Gaps may be provided between the insulating cap and shaft foot and between the shaft foot and feed tube shaft. In an alternate embodiment having smaller dimensions, an insulating ring is provided at the end of the feed tube shaft. The structure, combined with a positioning sleeve surrounding the feed tube shaft, permits placing a heat sensor much closer to the nozzle tip in order to obtain more accurate temperature measurements.
111 citations
TL;DR: In this paper, a mathematical model of the compressible transonic single and two-phase flow of a real fluid is discussed, in which the specific enthalpy, instead of the temperature, is an independent variable.
111 citations
Patent•
22 Dec 1966
TL;DR: A marine propulsion or pipeline pumping system, e.g. Marine propellers as mentioned in this paper comprises a propeller 21 in an annular rim 22 supported by water-lubricated rubber or rubber-like bearings in a nozzle 18, a flange 27 secured to rim 22 being engaged by radial faces of bearings 33, 34 and being provided with gear teeth 29 engaged by a driving pinion 59, or by a toothed drive belt.
Abstract: 1,197,850. Marine propellers. J. G. SATTERTHWAITE and J. B. MACY. 3 Dec., 1968, No. 57363/68. Heading B7V. [Also in Divisions F1 and F2] A marine propulsion or pipeline pumping system, e.g. for a tug, comprises a propeller 21 in an annular rim 22 supported by water-lubricated rubber or rubber-like bearings 33, 34 in a nozzle 18, a flange 27 secured to rim 22 being engaged by radial faces of bearings 33, 34 and being provided with gear teeth 29 engaged by a driving pinion 59, or by a toothed drive belt, Fig. 12 (not shown). Teeth 29 are of rubber and pinion 59 of stainless steel, or vice versa, water lubrication of the teeth and bearings 33, 34 being provided by annular water jacket 66 supplied with clean water under pressure. In the main propulsion form shown, nozzle 18 is mounted in a stern recess 16 and drive shaft 52 operates through forward and reverse gear trains 56, 62 with clutches 57, 63. Access panel 67 is removed to remove the segments of flange 27, propeller 21 then being removable from nozzle 18. The front and rear portions of nozzle 18 may be of rubber. Fig. 9 (not shown). Two contra-rotating propellers may be mounted in coaxial nozzles in a common assembly, Figs. 10 and 11 (not shown). The propeller system may be used as a bow or stern thruster, Figs. 1 and 12 (not shown). Rudders may be disposed forward and astern of the nozzle when used for main propulsion, Fig. 1 (not shown). The bearings 33, 34 each comprise a plurality of segments with radial and axial water channels, Fig. 5 (not shown) (see Division F2].
111 citations
TL;DR: In this paper, the authors consider the design of impinging jets for industrial drying applications, where the transfer of heat and mass between a drying medium and the material being dried is very critical for the overall economics of the operation.
Abstract: In industrial drying applications, efficient transfer of heat and mass between a drying medium and the material being dried is very critical for the overall economics of the operation. Impinging jets are therefore widely used for their enhanced tmnsport characteristics, especially for drying of continuous sheets of materials such as paper and textiles. In such applications, a thin sheet of material, as wide as 6m in cross machine direction, speeds at velocities as high as 90 km/hr under high velocity jets emerging from a confining surface parallel to the material surface. Many variables and effects need to k considered for proper design of such impinging jet systems: nozzle geometry and size, nozzle configuration, location of exhaust pons, nozzle-to-surface separation, jet-to-jet separation, cross flow, jet exit velocity and surface motion. For permeable materials, additional enhancement of heat and mass transfer that occur when some of the impinging gas is removed through the material makes this...
111 citations
Patent•
05 Jan 1966
TL;DR: In this paper, a mixture of powder and air is delivered through a passage of uniform crosssection and a short section of rotating tube to a rotating bell of nonconductive material having a surface angle with the axis of 50° to 90°.
Abstract: An apparatus for electrostatically coating conductive articles with powder. A mixture of powder and air is delivered through a passage of uniform cross-section and a short section of rotating tube to a rotating bell of nonconductive material having a surface angle with the axis of 50° to 90°. The powder is directed from a nozzle over the bell surface and the entraining air is dissipated laterally. The powder is discharged from the bell into an electrostatic field where the particles acquire a charge and are attracted to and deposited on the grounded articles. A pneumatic jet pump for entraining the powder particle in an air stream has a nozzle and venturi so related that the expanding air from the nozzle blends with the expanding portion of the venturi.
111 citations