US1681176A - Multiple diffusing nozzle - Google Patents

Multiple diffusing nozzle Download PDF

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Publication number
US1681176A
US1681176A US896A US89625A US1681176A US 1681176 A US1681176 A US 1681176A US 896 A US896 A US 896A US 89625 A US89625 A US 89625A US 1681176 A US1681176 A US 1681176A
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US
United States
Prior art keywords
nozzle
angle
nozzles
walls
multiple diffusing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US896A
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English (en)
Inventor
Dufour Leon
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Individual
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Individual
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Filing date
Publication date
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Publication of US1681176A publication Critical patent/US1681176A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/08—Influencing flow of fluids of jets leaving an orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening

Definitions

  • the difiusernozzle according to the present invention is combined of several diffusing elements where th-e wallsare arranged so as to produce a good efiiciency.
  • the ele' ments are adjoined in such a way that the angle between the diametrically opposed generatrices of the outer walls of the whole d1ffuser is considerably larger than the-usual angle of the best efficiency.
  • Figs. 1 and 2 are a longitudinal sectionand an end elevation of a first form.
  • FIG. 3 and 4 longitudinal section and end elevation of a second form
  • FIG. .7 and 8 longitudinal section and end elevation of a fourthform.
  • FIG. 11and 12 longitudinal section and a cross section of a sixth form.
  • FIGs. 1 and 2 represent a difluser nozzle of a known form hava one single passage way of a. quadratic cross-section. and walls opening at an angle oflO".
  • the fluid enters at. lat a certain speed and at a certain pressure in the direction of t-he arrow 2 andis discharged at 3 with a dimin:
  • Figs. 3 and 4 rep resentfia diitusen nozzle 1 according to the present iinventioncombined I the nozzle represented in Figs. 1 and 2 and the whole sectional 'areaotthe outlet at 6 is likewise the same as that of the foregoing apparatus.
  • the Figs. 5 and 6 represent a difiuser noz-v zle having sixteen .coinbined elements, each element of quadratic cross-section.
  • T The whole inlet areaat 7 and the whole outlet area at 8 are equal to the respective cross sections of the nozzles represented in Figs. 1 and 2.
  • the opening angle of each element is 10 and therefore the efiici-ency nearly the same as in the first nozzle, the length however is one fourth as much.
  • the elements could also be arranged around a central one.
  • the outer shell 13 is likewise a conical tube, but the single elements are obtained by winding a thin body for instance a sheet iron into a conical splral Where the generatrices of opposite sides are including an angle of The said shell could also be a conical tube into which said spiral is inserted.
  • a last example of a combined diffuser nozzle is shown which could be used as a suction pipe of a hydraulic turbine wheel.
  • the central axis of the spiral is a column 15 standing on the floor 16 of the tail-race and extended to the top of spiral at 17
  • the spiral itself is constituted of two walls 18, 19 beginning at the center where they are joined and ending after several turns into a surrounding circle which is enclosed by an outer shell 20 generally made of concrete.
  • the spirals are conical spirals where the generatrices of opposite sides are diverging at an angle of 10.
  • This invention allows not only to build diffuser of a smaller size having a good efiicicncy but also to use diffusers with smaller angles than 10 which will convert velocity of a fluid into pressure with a better eliiciency and avoiding the use of relatively long conduits.
  • Such combined diflusers may be employed in many cases, as for instance for the exhaust of internal combustion engines in order to convert the velocity of the exhaust gases into a vacuum at the inlet of the diffuser and to relieve the cylinder from the residues of combustion and to provide the same with fresh mixture or With scavenging air.
  • Such combined difluser nozzles may also be substituted for the suction conduits of a reaction turbine. In this case the velocity of the water at a smaller suction head is much better utilized which sometimes is of great importance.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US896A 1924-01-19 1925-01-06 Multiple diffusing nozzle Expired - Lifetime US1681176A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE227825X 1924-01-19

Publications (1)

Publication Number Publication Date
US1681176A true US1681176A (en) 1928-08-21

Family

ID=5866850

Family Applications (1)

Application Number Title Priority Date Filing Date
US896A Expired - Lifetime US1681176A (en) 1924-01-19 1925-01-06 Multiple diffusing nozzle

Country Status (4)

Country Link
US (1) US1681176A (enrdf_load_stackoverflow)
FR (1) FR591466A (enrdf_load_stackoverflow)
GB (1) GB227825A (enrdf_load_stackoverflow)
NL (1) NL16173C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556161A (en) * 1944-03-21 1951-06-12 Power Jets Res & Dev Ltd Gas diffusers for air supplied to combustion chambers

Also Published As

Publication number Publication date
GB227825A (en) 1926-04-08
FR591466A (fr) 1925-07-04
NL16173C (enrdf_load_stackoverflow)

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