Internal flow characteristics in scaled pressure-swirl atomizer
| Autor: | Graham Wigley, Jan Jedelský, Jaroslav Slama, Miroslav Jicha, Lada Janáčková, Marcel Sapík, Milan Malý |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Spray characteristics
Jet (fluid) Pressure-swirl Materials science High-speed camera 010308 nuclear & particles physics Internal flow Physics QC1-999 Laser Doppler Anemometry Mechanical engineering Reynolds number internal flow Combustion 01 natural sciences Viscosity symbols.namesake 0103 physical sciences symbols 010306 general physics Body orifice |
| Zdroj: | EPJ Web of Conferences, Vol 180, p 02059 (2018) EPJ Web of Conferences. 2018, vol. 180, issue 02059, p. 1-6. |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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