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Title: Atomizing nozzle and method

Abstract

A high pressure close-coupled gas atomizing nozzle includes multiple discrete gas jet discharge orifices having aerodynamically designed convergent-divergent geometry with an first converging section communicated to a gas supply manifold and to a diverging section by a constricted throat section to increase atomizing gas velocity. The gas jet orifices are oriented at gas jet apex angle selected relative to the melt supply tip apex angle to establish a melt aspiration condition at the melt supply tip.

Inventors:
 [1];  [1];  [1]
  1. (Ames, IA)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
873350
Patent Number(s):
US 6142382
Application Number:
06/142,382
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
DOE Contract Number:
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
atomizing; nozzle; method; pressure; close-coupled; gas; multiple; discrete; jet; discharge; orifices; aerodynamically; designed; convergent-divergent; geometry; converging; section; communicated; supply; manifold; diverging; constricted; throat; increase; velocity; oriented; apex; angle; selected; relative; melt; tip; establish; aspiration; condition; melt supply; throat section; gas supply; gas jet; atomizing nozzle; atomizing gas; gas velocity; supply manifold; selected relative; converging section; gas atomizing; discrete gas; discharge orifices; /239/

Citation Formats

Ting, Jason, Anderson, Iver E., and Terpstra, Robert L.. Atomizing nozzle and method. United States: N. p., 2000. Web.
Ting, Jason, Anderson, Iver E., & Terpstra, Robert L.. Atomizing nozzle and method. United States.
Ting, Jason, Anderson, Iver E., and Terpstra, Robert L.. 2000. "Atomizing nozzle and method". United States. doi:. https://www.osti.gov/servlets/purl/873350.
@article{osti_873350,
title = {Atomizing nozzle and method},
author = {Ting, Jason and Anderson, Iver E. and Terpstra, Robert L.},
abstractNote = {A high pressure close-coupled gas atomizing nozzle includes multiple discrete gas jet discharge orifices having aerodynamically designed convergent-divergent geometry with an first converging section communicated to a gas supply manifold and to a diverging section by a constricted throat section to increase atomizing gas velocity. The gas jet orifices are oriented at gas jet apex angle selected relative to the melt supply tip apex angle to establish a melt aspiration condition at the melt supply tip.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2000,
month = 3
}

Patent:

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  • The invention relates to a method and apparatus for atomizing liquids. In particular, the present invention relates to a method and apparatus for atomizing heavy hydrocarbon fuels such as diesel, as part of a fuel reforming process. During normal operating conditions the fuel is atomized by a high pressure fluid. Under start-up conditions when only a low pressure gas is available the fuel films across part of the nozzle and is subsequently atomized by a radially directed low pressure dispersion gas.
  • The invention relates to a method an apparatus for atomizing liquids. In particular, the present invention relates to a method and apparatus for atomizing heavy hydrocarbon fuels such as diesel, as part of a fuel reforming process. During normal operating conditions the fuel is atomized by a high pressure fluid. Under start-up conditions when only a low pressure gas is available the fuel films across part of the nozzle and is subsequently atomized by a radially directed low pressure dispersion gas.
  • The invention relates to clean burning of fuel oil with air. More specifically, to a fuel burning combustion head using a low-pressure, high air flow atomizing nozzle so that there will be a complete combustion oil resulting in a minimum emission of pollutants. The inventors have devised a fuel burner that uses a low pressure air atomizing nozzle. The improved fuel burner does not result in the use of additional compressors or the introduction of pressurized gases downstream, nor does it require a complex design.
  • High pressure atomizing nozzle includes a high pressure gas manifold having a divergent expansion chamber between a gas inlet and arcuate manifold segment to minimize standing shock wave patterns in the manifold and thereby improve filling of the manifold with high pressure gas for improved melt atomization. The atomizing nozzle is especially useful in atomizing rare earth-transition metal alloys to form fine powder particles wherein a majority of the powder particles exhibit particle sizes having near-optimum magnetic properties.
  • High pressure atomizing nozzle includes a high pressure gas manifold having a divergent expansion chamber between a gas inlet and arcuate manifold segment to minimize standing shock wave patterns in the manifold and thereby improve filling of the manifold with high pressure gas for improved melt atomization. The atomizing nozzle is especially useful in atomizing rare earth-transition metal alloys to form fine powder particles wherein a majority of the powder particles exhibit particle sizes having near-optimum magnetic properties.