Hydrodynamic model for the plasma-gas flow in a cutting torch nozzle
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Redalyc
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| Format: | Artículo científico |
| Langue: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876484621245349888 |
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| author | F.O. Minotti |
| author_facet | F.O. Minotti |
| contents | Hydrodynamic model for the plasma-gas flow in a cutting torch nozzle F.O. Minotti H. Kelly B. Mancinelli L. Prevosto Física, Astronomía y Matemáticas We present a simple hydrodynamic model to obtain the profiles of the relevant physical quantities along a nozzleof arbitrary cross-section in a cutting torch. The model uses a two-zone approximation (a hot central plasmacarrying the discharge current wrapped by a relatively cold gas which thermally isolates the nozzle wall fromthe plasma). Seeking for a solution with sonic conditions at the nozzle exit, the model allows expressing all the profiles in terms of the externally controlled parameters of the torch (geometry of the torch, discharge current, mass flow of the gas and plenum pressure) and the values of the arc and gas temperatures at the nozzle entrance.These last two values can be estimated simply appealing to energy conservation in the cathode-nozzle region.The model contains additional features compared with previous reported models, while retaining simplicity.The detailed consideration of an arc region coupled to the surrounding gas dynamics allows determining voltagedrops and consequent delivered power with less assumptions than those found in other published works, and atthe same time reduces the set of parameters needed to determine the solution. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434806 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.34 |
| format | Artículo científico |
| id | redalyc_46434806 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Hydrodynamic model for the plasma-gas flow in a cutting torch nozzle F.O. Minotti Física, Astronomía y Matemáticas Hydrodynamic model for the plasma-gas flow in a cutting torch nozzle F.O. Minotti H. Kelly B. Mancinelli L. Prevosto Física, Astronomía y Matemáticas We present a simple hydrodynamic model to obtain the profiles of the relevant physical quantities along a nozzleof arbitrary cross-section in a cutting torch. The model uses a two-zone approximation (a hot central plasmacarrying the discharge current wrapped by a relatively cold gas which thermally isolates the nozzle wall fromthe plasma). Seeking for a solution with sonic conditions at the nozzle exit, the model allows expressing all the profiles in terms of the externally controlled parameters of the torch (geometry of the torch, discharge current, mass flow of the gas and plenum pressure) and the values of the arc and gas temperatures at the nozzle entrance.These last two values can be estimated simply appealing to energy conservation in the cathode-nozzle region.The model contains additional features compared with previous reported models, while retaining simplicity.The detailed consideration of an arc region coupled to the surrounding gas dynamics allows determining voltagedrops and consequent delivered power with less assumptions than those found in other published works, and atthe same time reduces the set of parameters needed to determine the solution. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434806 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.34 |
| title | Hydrodynamic model for the plasma-gas flow in a cutting torch nozzle |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434806 |