Effects of Back Pressure on Flow Regime and Suction Performance of Gas-Liquid Swirl Ejector

Sang Hoon Kim, Sang Min Kim, Tae Ho Ko, Hyung Min Kim, Jisang Yoon, Woong Sup Yoon, Joonsang Lee

Research output: Contribution to journalArticle

Abstract

The back pressure of a gas-liquid swirl ejector is a critical parameter that affects the flow regime and entrainment performance of the system. In the case of a weak swirl injection, the motive jet carries relatively higher axial momentum thus remains in a single phase and the liquids appear glassy. With increasing in the back pressure of the bubble flow, the suction rate drops rapidly. For a strong swirl injection, the liquid jet is disintegrated due to higher angular momentum and the spray is atomized. Augmentation in the back pressure also causes the reduction in the suction rate but it tends to grow more gradual than the weak swirl injection. As a result, the suction rate of the strong swirl is greater than that of the weak swirl in the majority of the back-pressure range. However, owing to the high transition pressure, only the weak swirl entrains the air in the bubble flow regime at low back pressure. The relationship between the suction and the swirl intensity is not fixed and is influenced by the back pressure.

Original languageEnglish
Article number20180264
JournalInternational Journal of Chemical Reactor Engineering
Volume17
Issue number9
DOIs
Publication statusPublished - 2019 Sep 1

Fingerprint

Air ejectors
Gases
Liquids
Angular momentum
Bubbles (in fluids)
Momentum

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

Kim, Sang Hoon ; Kim, Sang Min ; Ko, Tae Ho ; Kim, Hyung Min ; Yoon, Jisang ; Yoon, Woong Sup ; Lee, Joonsang. / Effects of Back Pressure on Flow Regime and Suction Performance of Gas-Liquid Swirl Ejector. In: International Journal of Chemical Reactor Engineering. 2019 ; Vol. 17, No. 9.
@article{de6889600d74478eac603cc7befbfc02,
title = "Effects of Back Pressure on Flow Regime and Suction Performance of Gas-Liquid Swirl Ejector",
abstract = "The back pressure of a gas-liquid swirl ejector is a critical parameter that affects the flow regime and entrainment performance of the system. In the case of a weak swirl injection, the motive jet carries relatively higher axial momentum thus remains in a single phase and the liquids appear glassy. With increasing in the back pressure of the bubble flow, the suction rate drops rapidly. For a strong swirl injection, the liquid jet is disintegrated due to higher angular momentum and the spray is atomized. Augmentation in the back pressure also causes the reduction in the suction rate but it tends to grow more gradual than the weak swirl injection. As a result, the suction rate of the strong swirl is greater than that of the weak swirl in the majority of the back-pressure range. However, owing to the high transition pressure, only the weak swirl entrains the air in the bubble flow regime at low back pressure. The relationship between the suction and the swirl intensity is not fixed and is influenced by the back pressure.",
author = "Kim, {Sang Hoon} and Kim, {Sang Min} and Ko, {Tae Ho} and Kim, {Hyung Min} and Jisang Yoon and Yoon, {Woong Sup} and Joonsang Lee",
year = "2019",
month = "9",
day = "1",
doi = "10.1515/ijcre-2018-0264",
language = "English",
volume = "17",
journal = "International Journal of Chemical Reactor Engineering",
issn = "1542-6580",
publisher = "Berkeley Electronic Press",
number = "9",

}

Effects of Back Pressure on Flow Regime and Suction Performance of Gas-Liquid Swirl Ejector. / Kim, Sang Hoon; Kim, Sang Min; Ko, Tae Ho; Kim, Hyung Min; Yoon, Jisang; Yoon, Woong Sup; Lee, Joonsang.

In: International Journal of Chemical Reactor Engineering, Vol. 17, No. 9, 20180264, 01.09.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of Back Pressure on Flow Regime and Suction Performance of Gas-Liquid Swirl Ejector

AU - Kim, Sang Hoon

AU - Kim, Sang Min

AU - Ko, Tae Ho

AU - Kim, Hyung Min

AU - Yoon, Jisang

AU - Yoon, Woong Sup

AU - Lee, Joonsang

PY - 2019/9/1

Y1 - 2019/9/1

N2 - The back pressure of a gas-liquid swirl ejector is a critical parameter that affects the flow regime and entrainment performance of the system. In the case of a weak swirl injection, the motive jet carries relatively higher axial momentum thus remains in a single phase and the liquids appear glassy. With increasing in the back pressure of the bubble flow, the suction rate drops rapidly. For a strong swirl injection, the liquid jet is disintegrated due to higher angular momentum and the spray is atomized. Augmentation in the back pressure also causes the reduction in the suction rate but it tends to grow more gradual than the weak swirl injection. As a result, the suction rate of the strong swirl is greater than that of the weak swirl in the majority of the back-pressure range. However, owing to the high transition pressure, only the weak swirl entrains the air in the bubble flow regime at low back pressure. The relationship between the suction and the swirl intensity is not fixed and is influenced by the back pressure.

AB - The back pressure of a gas-liquid swirl ejector is a critical parameter that affects the flow regime and entrainment performance of the system. In the case of a weak swirl injection, the motive jet carries relatively higher axial momentum thus remains in a single phase and the liquids appear glassy. With increasing in the back pressure of the bubble flow, the suction rate drops rapidly. For a strong swirl injection, the liquid jet is disintegrated due to higher angular momentum and the spray is atomized. Augmentation in the back pressure also causes the reduction in the suction rate but it tends to grow more gradual than the weak swirl injection. As a result, the suction rate of the strong swirl is greater than that of the weak swirl in the majority of the back-pressure range. However, owing to the high transition pressure, only the weak swirl entrains the air in the bubble flow regime at low back pressure. The relationship between the suction and the swirl intensity is not fixed and is influenced by the back pressure.

UR - http://www.scopus.com/inward/record.url?scp=85065993626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065993626&partnerID=8YFLogxK

U2 - 10.1515/ijcre-2018-0264

DO - 10.1515/ijcre-2018-0264

M3 - Article

AN - SCOPUS:85065993626

VL - 17

JO - International Journal of Chemical Reactor Engineering

JF - International Journal of Chemical Reactor Engineering

SN - 1542-6580

IS - 9

M1 - 20180264

ER -