Experiments on atomization characteristics of the flash swirl spray

Wonho Kim, Hyungmin Kim, Woongsup Yoon

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

An experimental study on the secondary spray formation and interaction with primary one for the flash swirl spray was performed. To elucidate the vaporization and atomization characteristics on these spray regions, the local temperatures and droplet sizes were measured and averaged on the axial cross-section using a K-type thermocouple and laser-based optical technique, respectively. In order to obtain the physically meaningful mean droplet size, the time-averaging method was also considered as "total SMD." Experiments were conducted by ejecting the superheated liquids (water) into an atmospheric pressure environment with variations of essential injection parameters. The elevation of the superheat degree or the injection pressure activates the thermal atomization in the primary spray owing to the increased available energy, which augments the number percent of drops in the secondary spray by the entrained gas effect. On the contrary, the enlargement of the nozzle diameter, in spite of the unchanged available energy, enhances the atomization characteristics of the primary spray by growing the instability of the liquid sheet due to the increment of the vapor production.

Original languageEnglish
DOIs
Publication statusPublished - 2012 Dec 1
Event50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States
Duration: 2012 Jan 92012 Jan 12

Other

Other50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityNashville, TN
Period12/1/912/1/12

Fingerprint

Atomization
Surface mount technology
Experiments
Liquids
Thermocouples
Vaporization
Atmospheric pressure
Nozzles
Vapors
Lasers
Gases
Water
Temperature

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Kim, W., Kim, H., & Yoon, W. (2012). Experiments on atomization characteristics of the flash swirl spray. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States. https://doi.org/10.2514/6.2012-176
Kim, Wonho ; Kim, Hyungmin ; Yoon, Woongsup. / Experiments on atomization characteristics of the flash swirl spray. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States.
@conference{c783cc4898ec4a3cbe365f7f11379ee4,
title = "Experiments on atomization characteristics of the flash swirl spray",
abstract = "An experimental study on the secondary spray formation and interaction with primary one for the flash swirl spray was performed. To elucidate the vaporization and atomization characteristics on these spray regions, the local temperatures and droplet sizes were measured and averaged on the axial cross-section using a K-type thermocouple and laser-based optical technique, respectively. In order to obtain the physically meaningful mean droplet size, the time-averaging method was also considered as {"}total SMD.{"} Experiments were conducted by ejecting the superheated liquids (water) into an atmospheric pressure environment with variations of essential injection parameters. The elevation of the superheat degree or the injection pressure activates the thermal atomization in the primary spray owing to the increased available energy, which augments the number percent of drops in the secondary spray by the entrained gas effect. On the contrary, the enlargement of the nozzle diameter, in spite of the unchanged available energy, enhances the atomization characteristics of the primary spray by growing the instability of the liquid sheet due to the increment of the vapor production.",
author = "Wonho Kim and Hyungmin Kim and Woongsup Yoon",
year = "2012",
month = "12",
day = "1",
doi = "10.2514/6.2012-176",
language = "English",
note = "50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition ; Conference date: 09-01-2012 Through 12-01-2012",

}

Kim, W, Kim, H & Yoon, W 2012, 'Experiments on atomization characteristics of the flash swirl spray', Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States, 12/1/9 - 12/1/12. https://doi.org/10.2514/6.2012-176

Experiments on atomization characteristics of the flash swirl spray. / Kim, Wonho; Kim, Hyungmin; Yoon, Woongsup.

2012. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Experiments on atomization characteristics of the flash swirl spray

AU - Kim, Wonho

AU - Kim, Hyungmin

AU - Yoon, Woongsup

PY - 2012/12/1

Y1 - 2012/12/1

N2 - An experimental study on the secondary spray formation and interaction with primary one for the flash swirl spray was performed. To elucidate the vaporization and atomization characteristics on these spray regions, the local temperatures and droplet sizes were measured and averaged on the axial cross-section using a K-type thermocouple and laser-based optical technique, respectively. In order to obtain the physically meaningful mean droplet size, the time-averaging method was also considered as "total SMD." Experiments were conducted by ejecting the superheated liquids (water) into an atmospheric pressure environment with variations of essential injection parameters. The elevation of the superheat degree or the injection pressure activates the thermal atomization in the primary spray owing to the increased available energy, which augments the number percent of drops in the secondary spray by the entrained gas effect. On the contrary, the enlargement of the nozzle diameter, in spite of the unchanged available energy, enhances the atomization characteristics of the primary spray by growing the instability of the liquid sheet due to the increment of the vapor production.

AB - An experimental study on the secondary spray formation and interaction with primary one for the flash swirl spray was performed. To elucidate the vaporization and atomization characteristics on these spray regions, the local temperatures and droplet sizes were measured and averaged on the axial cross-section using a K-type thermocouple and laser-based optical technique, respectively. In order to obtain the physically meaningful mean droplet size, the time-averaging method was also considered as "total SMD." Experiments were conducted by ejecting the superheated liquids (water) into an atmospheric pressure environment with variations of essential injection parameters. The elevation of the superheat degree or the injection pressure activates the thermal atomization in the primary spray owing to the increased available energy, which augments the number percent of drops in the secondary spray by the entrained gas effect. On the contrary, the enlargement of the nozzle diameter, in spite of the unchanged available energy, enhances the atomization characteristics of the primary spray by growing the instability of the liquid sheet due to the increment of the vapor production.

UR - http://www.scopus.com/inward/record.url?scp=84872402443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872402443&partnerID=8YFLogxK

U2 - 10.2514/6.2012-176

DO - 10.2514/6.2012-176

M3 - Paper

AN - SCOPUS:84872402443

ER -

Kim W, Kim H, Yoon W. Experiments on atomization characteristics of the flash swirl spray. 2012. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States. https://doi.org/10.2514/6.2012-176