Effect of Geometric Factors on Spray Characteristics and Stability for Small Spill-Return Pressure-Swirl Atomizers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU120458" target="_blank" >RIV/00216305:26210/16:PU120458 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Effect of Geometric Factors on Spray Characteristics and Stability for Small Spill-Return Pressure-Swirl Atomizers

Original language description

Pressure-swirl (PS) atomizers are popular for the simple construction and wide turn-down ratio of their spill-return (SR) versions. In this work, we experimentally investigated a small SR PS atomizer with aim to find the effect of entry port number (2, 3 and 4), swirl chamber shape (hemispheric; conical; curved convex and flat conical), SR design (axial and off-axis spill orifices) and manufacturing precision on the spray quality and stability. The characteristics (droplet size in the spray, the spray cone angle, pressure pulsations and discharge coefficient) were studied using phase-Doppler anemometry, high-speed visualization and a pressure-fluctuation sensing. The tests were provided with Jet A-1 fuel at inlet pressures of 0.5, 1.0 and 1.5 MPa and for spill/feed ratios (SFRs) of 0.4 and 0.8. The swirl chamber shape influenced the spray stability; conical chambers were more stable than others. The spray was found circumferentially heterogeneous; its uniformity improved with the increases in the swirling inlets number and the inlet pressure. Atomizers with axial spill orifice at SFR = 0 demonstrated strong spray pulsations while atomizers with the off-axis spill orifices produced a stable spray. Periodical decay of the air core was suggested as the pulsation reason. The manufacturing precision, axial symmetry and matching of the surfaces of connected parts was found important for the spray symmetry and homogeneity.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JE - Non-nuclear power engineering, energy consumption and utilization

OECD FORD branch

—

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2016

Confidentiality

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

Article name in the collection

27th European Conference on Liquid Atomization and Spray Systems

ISBN

978-1-910172-09-4

ISSN

—

e-ISSN

—

Number of pages

10

Pages from-to

1-12

Publisher name

Neuveden

Place of publication

Brighton

Event location

Brighton

Event date

Sep 4, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—