Effect of spill orifice geometry on performance of spill-return pressure-swirl atomizers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F18%3APU129077" target="_blank" >RIV/00216305:26210/18:PU129077 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of spill orifice geometry on performance of spill-return pressure-swirl atomizers

Popis výsledku v původním jazyce

Pressure-swirl (PS) atomizers are much favoured for their simple construction, reliability and fine spray. They produce a hollow cone spray with drop sizes strongly linked to the inlet overpressure, pl. Their disadvantage is a limitation in turn-down ratio due to their flow rate dependency on the square root of the pl. To overcome this drawback, a spill-return (SR) version was developed in the past. In this work, small SR PS atomizers were exper-imentally investigated using PDA and high-speed imaging with the aim to determine the effect of the SR orifice design, e.g. the positioning of the axial and off-axis spill orifices, their number and inclination on control charac-teristics, nozzle efficiency and spray characteristics. These data are not to be found in the open literature. The axially positioned SR orifice shows an unstable spray for low spill-to-feed ratios (SFR) compared to the off-axial spill orifice version that produces a stable spray at all tested regimes. However, the axially placed SR or

Název v anglickém jazyce

Effect of spill orifice geometry on performance of spill-return pressure-swirl atomizers

Popis výsledku anglicky

Pressure-swirl (PS) atomizers are much favoured for their simple construction, reliability and fine spray. They produce a hollow cone spray with drop sizes strongly linked to the inlet overpressure, pl. Their disadvantage is a limitation in turn-down ratio due to their flow rate dependency on the square root of the pl. To overcome this drawback, a spill-return (SR) version was developed in the past. In this work, small SR PS atomizers were exper-imentally investigated using PDA and high-speed imaging with the aim to determine the effect of the SR orifice design, e.g. the positioning of the axial and off-axis spill orifices, their number and inclination on control charac-teristics, nozzle efficiency and spray characteristics. These data are not to be found in the open literature. The axially positioned SR orifice shows an unstable spray for low spill-to-feed ratios (SFR) compared to the off-axial spill orifice version that produces a stable spray at all tested regimes. However, the axially placed SR or

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů