Importance of Geometrical Factors on Spray Characteristics of Spill-return Atomisers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F21%3APU138562" target="_blank" >RIV/00216305:26210/21:PU138562 - isvavai.cz</a>

Výsledek na webu

<a href="https://arc.aiaa.org/doi/full/10.2514/1.B38066" target="_blank" >https://arc.aiaa.org/doi/full/10.2514/1.B38066</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2514/1.B38066" target="_blank" >10.2514/1.B38066</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Importance of Geometrical Factors on Spray Characteristics of Spill-return Atomisers

Popis výsledku v původním jazyce

An experimental investigation into small pressure-swirl spill-return atomizers was made to determine the effect of the entry port number, swirl chamber shape, spill-line design and the manufacturing precision on the spray quality and stability. The atomizers were experimentally studied using phase-Doppler anemometry, high-speed visualization and mechanical patternation. The Jet A-1 fuel was sprayed at inlet pressures of 0.5, 1.0 and 1.5 MPa and for spill-to-feed ratios of 0, 0.4 and 0.8. The chamber shape influenced the spray characteristics of the simplex atomizers only moderately with no systematic effect of conical chambers to the others. The spray was found to be circumferentially heterogeneous; its uniformity improved with increase in the pressure while the effect of swirling port number was negligible. Atomizers with axial spill orifice demonstrated strong spray pulsations at a spill-to-feed ratio of zero. A periodic decay of the air core was identified as a possible reason for the pulsations. Atomizers with the off-axis spill orifices always produced a stable spray. The atomizers with tangential inlet ports provided a finer spray than those with the helical ports. The manufacturing precision, axial symmetry and matching of the surfaces of connected parts were found important for the spray symmetry and homogeneity.

Název v anglickém jazyce

Importance of Geometrical Factors on Spray Characteristics of Spill-return Atomisers

Popis výsledku anglicky

An experimental investigation into small pressure-swirl spill-return atomizers was made to determine the effect of the entry port number, swirl chamber shape, spill-line design and the manufacturing precision on the spray quality and stability. The atomizers were experimentally studied using phase-Doppler anemometry, high-speed visualization and mechanical patternation. The Jet A-1 fuel was sprayed at inlet pressures of 0.5, 1.0 and 1.5 MPa and for spill-to-feed ratios of 0, 0.4 and 0.8. The chamber shape influenced the spray characteristics of the simplex atomizers only moderately with no systematic effect of conical chambers to the others. The spray was found to be circumferentially heterogeneous; its uniformity improved with increase in the pressure while the effect of swirling port number was negligible. Atomizers with axial spill orifice demonstrated strong spray pulsations at a spill-to-feed ratio of zero. A periodic decay of the air core was identified as a possible reason for the pulsations. Atomizers with the off-axis spill orifices always produced a stable spray. The atomizers with tangential inlet ports provided a finer spray than those with the helical ports. The manufacturing precision, axial symmetry and matching of the surfaces of connected parts were found important for the spray symmetry and homogeneity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

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

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Propulsion and Power

ISSN

0748-4658

e-ISSN

1533-3876

Svazek periodika

37

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

408-418

Kód UT WoS článku

000658185200007

EID výsledku v databázi Scopus

2-s2.0-85116463716