Internal flow characteristics in scaled pressure-swirl atomizer
Pressure-swirl atomizers are used in a wide range of industrial applications, e.g.: combustion, cooling, painting, food processing etc. Their spray characteristics are closely linked to the internal flow which predetermines the parameters of the liquid sheet formed at the discharge orifice. To achie...
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2018-01-01
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Series: | EPJ Web of Conferences |
Online Access: | https://doi.org/10.1051/epjconf/201818002059 |
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doaj-7c401822b08748b88145af9d4ca31b3a2021-08-02T04:19:36ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011800205910.1051/epjconf/201818002059epjconf_efm2018_02059Internal flow characteristics in scaled pressure-swirl atomizerMalý MilanSapík MarcelJedelský JanJanáčková LadaJícha MiroslavSláma JaroslavWigley GrahamPressure-swirl atomizers are used in a wide range of industrial applications, e.g.: combustion, cooling, painting, food processing etc. Their spray characteristics are closely linked to the internal flow which predetermines the parameters of the liquid sheet formed at the discharge orifice. To achieve a better understanding of the spray formation process, the internal flow was characterised using Laser Doppler Anemometry (LDA) and high-speed imaging in a transparent model made of cast PMMA (Poly(methyl methacrylate)). The design of the transparent atomizer was derived from a pressure-swirl atomizer as used in a small gas turbine. Due to the small dimensions, it was manufactured in a scale of 10:1. It has modular concept and consists of three parts which were ground, polished and bolted together. The original kerosene-type jet A-1 fuel had to be replaced due to the necessity of a refractive index match. The new working liquid should also be colourless, non-aggressive to the PMMA and have the appropriate viscosity to achieve the same Reynolds number as in the original atomizer. Several liquids were chosen and tested to satisfy these requirements. P-Cymene was chosen as the suitable working liquid. The internal flow characteristics were consequently examined by LDA and high-speed camera using p-Cymene and Kerosene-type jet A-1 in comparative manner.https://doi.org/10.1051/epjconf/201818002059 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Malý Milan Sapík Marcel Jedelský Jan Janáčková Lada Jícha Miroslav Sláma Jaroslav Wigley Graham |
spellingShingle |
Malý Milan Sapík Marcel Jedelský Jan Janáčková Lada Jícha Miroslav Sláma Jaroslav Wigley Graham Internal flow characteristics in scaled pressure-swirl atomizer EPJ Web of Conferences |
author_facet |
Malý Milan Sapík Marcel Jedelský Jan Janáčková Lada Jícha Miroslav Sláma Jaroslav Wigley Graham |
author_sort |
Malý Milan |
title |
Internal flow characteristics in scaled pressure-swirl atomizer |
title_short |
Internal flow characteristics in scaled pressure-swirl atomizer |
title_full |
Internal flow characteristics in scaled pressure-swirl atomizer |
title_fullStr |
Internal flow characteristics in scaled pressure-swirl atomizer |
title_full_unstemmed |
Internal flow characteristics in scaled pressure-swirl atomizer |
title_sort |
internal flow characteristics in scaled pressure-swirl atomizer |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2018-01-01 |
description |
Pressure-swirl atomizers are used in a wide range of industrial applications, e.g.: combustion, cooling, painting, food processing etc. Their spray characteristics are closely linked to the internal flow which predetermines the parameters of the liquid sheet formed at the discharge orifice. To achieve a better understanding of the spray formation process, the internal flow was characterised using Laser Doppler Anemometry (LDA) and high-speed imaging in a transparent model made of cast PMMA (Poly(methyl methacrylate)). The design of the transparent atomizer was derived from a pressure-swirl atomizer as used in a small gas turbine. Due to the small dimensions, it was manufactured in a scale of 10:1. It has modular concept and consists of three parts which were ground, polished and bolted together. The original kerosene-type jet A-1 fuel had to be replaced due to the necessity of a refractive index match. The new working liquid should also be colourless, non-aggressive to the PMMA and have the appropriate viscosity to achieve the same Reynolds number as in the original atomizer. Several liquids were chosen and tested to satisfy these requirements. P-Cymene was chosen as the suitable working liquid. The internal flow characteristics were consequently examined by LDA and high-speed camera using p-Cymene and Kerosene-type jet A-1 in comparative manner. |
url |
https://doi.org/10.1051/epjconf/201818002059 |
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