Detail publikace
Optimalizace tlakové vířivé trysky pro retrofit hořáku
JEDELSKÝ, J. JÍCHA, M.
Český název
Optimalizace tlakové vířivé trysky pro retrofit hořáku
Anglický název
Optimization of Pressure-Swirl Atomizer for a Burner Retrofit
Typ
abstrakt
Jazyk
en
Originální abstrakt
This study documents several ways to reduce drop size in spray of a spill-return type pressure-swirl atomizer (PSA) for a waste oil burner. In the first part, liquid breakup and spray microstructure of PSAs was documented using spray photography and Phase-Doppler Anemometry (PDA) on a cold test bench at different loads. Then factors that affect the spray characteristics, such as: (1) nozzle design and dimensions, (2) operational conditions and (3) physical properties of atomized liquid, were analysed based on a literature survey. According the analysis, several geometrical factors were chosen for design of six nozzles with modified geometry that were probed using PDA. The literature data analysis shows that a modification of rheological properties of fuel used, namely its heating-up, would significantly reduce D32 mainly due to a viscosity change. Our tests show that doubling the inlet pressure with additional reduction of exit orifice size to keep flow rate would drop D32 by 28 – 33%. The simplest and the most cost efficient way is an optimization of the internal nozzle geometry, which according to our tests, leads to a reduction of D32 by about 7%.
Český abstrakt
Článek popisuje optimalizaci tlakové vířivé trysky pro retrofit hořáku. This study documents several ways to reduce drop size in spray of a spill-return type pressure-swirl atomizer (PSA) for a waste oil burner. In the first part, liquid breakup and spray microstructure of PSAs was documented using spray photography and Phase-Doppler Anemometry (PDA) on a cold test bench at different loads. Then factors that affect the spray characteristics, such as: (1) nozzle design and dimensions, (2) operational conditions and (3) physical properties of atomized liquid, were analysed based on a literature survey. According the analysis, several geometrical factors were chosen for design of six nozzles with modified geometry that were probed using PDA. The literature data analysis shows that a modification of rheological properties of fuel used, namely its heating-up, would significantly reduce D32 mainly due to a viscosity change. Our tests show that doubling the inlet pressure with additional reduction of exit orifice size to keep flow rate would drop D32 by 28 – 33%. The simplest and the most cost efficient way is an optimization of the internal nozzle geometry, which according to our tests, leads to a reduction of D32 by about 7%.
Anglický abstrakt
This study documents several ways to reduce drop size in spray of a spill-return type pressure-swirl atomizer (PSA) for a waste oil burner. In the first part, liquid breakup and spray microstructure of PSAs was documented using spray photography and Phase-Doppler Anemometry (PDA) on a cold test bench at different loads. Then factors that affect the spray characteristics, such as: (1) nozzle design and dimensions, (2) operational conditions and (3) physical properties of atomized liquid, were analysed based on a literature survey. According the analysis, several geometrical factors were chosen for design of six nozzles with modified geometry that were probed using PDA. The literature data analysis shows that a modification of rheological properties of fuel used, namely its heating-up, would significantly reduce D32 mainly due to a viscosity change. Our tests show that doubling the inlet pressure with additional reduction of exit orifice size to keep flow rate would drop D32 by 28 – 33%. The simplest and the most cost efficient way is an optimization of the internal nozzle geometry, which according to our tests, leads to a reduction of D32 by about 7%.
Klíčová slova česky
Optimalizace konstrukce, tlaková vířivá tryska, retrofit hořáku
Klíčová slova anglicky
Design optimization, Pressure-Swirl Atomizer, Burner Retrofit
Vydáno
02.09.2013
Nakladatel
Mediterranean Agronomic Institute of Chania
Místo
Chania, Greece
Kniha
Proceedings of the 25th European Conference on Liquid Atomization and Spray Systems.
Strany od–do
1–8
Počet stran
8