Heat transfer measurement on slot film cooling of ramjet combustor

K. W. Lee, J. Song, M. G. Oh, M. S. Yu, H. H. Cho, H. C. Ham, K. Y. Hwang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The present experiment has been conducted to investigate effects of a recirculation zone at a multi-slot film cooling system in a ramjet combustor. The tested model is a pre-diffuser typed ramjet combustor having a recirculation zone due to the large expansion duct. The recirculation zone directly affects on the film cooling effectiveness and heat transfer coefficient at the first two slots of multi-slot system. Results from experiments are divided into two flow regions - a recirculation region and a boundary layer developing region. In the former region, the film cooling effectiveness decreases rapidly due to the mixing effect by a shear layer between the recirculation flow and the injected coolant from the slot. In the later cases, the lip thickness to slot height ratio is a main factor on film cooling effectiveness due to the generated eddies behind the back step of slot lip. As the blowing rate increases, the film cooling effectiveness is enhanced for all cases due to the augmented momentum of injected coolant from the slot.

Original languageEnglish
Title of host publication44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
Publication statusPublished - 2008 Dec 1
Event44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Hartford, CT, United States
Duration: 2008 Jul 212008 Jul 23

Other

Other44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
CountryUnited States
CityHartford, CT
Period08/7/2108/7/23

Fingerprint

film cooling
combustion chambers
Combustors
slots
heat transfer
Heat transfer
Cooling
cooling
Coolants
coolants
Blow molding
Cooling systems
Ducts
Heat transfer coefficients
momentum
Momentum
eddy
Boundary layers
blowing
diffusers

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Control and Systems Engineering
  • Space and Planetary Science
  • Energy(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering

Cite this

Lee, K. W., Song, J., Oh, M. G., Yu, M. S., Cho, H. H., Ham, H. C., & Hwang, K. Y. (2008). Heat transfer measurement on slot film cooling of ramjet combustor. In 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
Lee, K. W. ; Song, J. ; Oh, M. G. ; Yu, M. S. ; Cho, H. H. ; Ham, H. C. ; Hwang, K. Y. / Heat transfer measurement on slot film cooling of ramjet combustor. 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. 2008.
@inproceedings{532f41bf61b248f189013d03fffedc27,
title = "Heat transfer measurement on slot film cooling of ramjet combustor",
abstract = "The present experiment has been conducted to investigate effects of a recirculation zone at a multi-slot film cooling system in a ramjet combustor. The tested model is a pre-diffuser typed ramjet combustor having a recirculation zone due to the large expansion duct. The recirculation zone directly affects on the film cooling effectiveness and heat transfer coefficient at the first two slots of multi-slot system. Results from experiments are divided into two flow regions - a recirculation region and a boundary layer developing region. In the former region, the film cooling effectiveness decreases rapidly due to the mixing effect by a shear layer between the recirculation flow and the injected coolant from the slot. In the later cases, the lip thickness to slot height ratio is a main factor on film cooling effectiveness due to the generated eddies behind the back step of slot lip. As the blowing rate increases, the film cooling effectiveness is enhanced for all cases due to the augmented momentum of injected coolant from the slot.",
author = "Lee, {K. W.} and J. Song and Oh, {M. G.} and Yu, {M. S.} and Cho, {H. H.} and Ham, {H. C.} and Hwang, {K. Y.}",
year = "2008",
month = "12",
day = "1",
language = "English",
isbn = "9781563479434",
booktitle = "44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit",

}

Lee, KW, Song, J, Oh, MG, Yu, MS, Cho, HH, Ham, HC & Hwang, KY 2008, Heat transfer measurement on slot film cooling of ramjet combustor. in 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Hartford, CT, United States, 08/7/21.

Heat transfer measurement on slot film cooling of ramjet combustor. / Lee, K. W.; Song, J.; Oh, M. G.; Yu, M. S.; Cho, H. H.; Ham, H. C.; Hwang, K. Y.

44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. 2008.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Heat transfer measurement on slot film cooling of ramjet combustor

AU - Lee, K. W.

AU - Song, J.

AU - Oh, M. G.

AU - Yu, M. S.

AU - Cho, H. H.

AU - Ham, H. C.

AU - Hwang, K. Y.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - The present experiment has been conducted to investigate effects of a recirculation zone at a multi-slot film cooling system in a ramjet combustor. The tested model is a pre-diffuser typed ramjet combustor having a recirculation zone due to the large expansion duct. The recirculation zone directly affects on the film cooling effectiveness and heat transfer coefficient at the first two slots of multi-slot system. Results from experiments are divided into two flow regions - a recirculation region and a boundary layer developing region. In the former region, the film cooling effectiveness decreases rapidly due to the mixing effect by a shear layer between the recirculation flow and the injected coolant from the slot. In the later cases, the lip thickness to slot height ratio is a main factor on film cooling effectiveness due to the generated eddies behind the back step of slot lip. As the blowing rate increases, the film cooling effectiveness is enhanced for all cases due to the augmented momentum of injected coolant from the slot.

AB - The present experiment has been conducted to investigate effects of a recirculation zone at a multi-slot film cooling system in a ramjet combustor. The tested model is a pre-diffuser typed ramjet combustor having a recirculation zone due to the large expansion duct. The recirculation zone directly affects on the film cooling effectiveness and heat transfer coefficient at the first two slots of multi-slot system. Results from experiments are divided into two flow regions - a recirculation region and a boundary layer developing region. In the former region, the film cooling effectiveness decreases rapidly due to the mixing effect by a shear layer between the recirculation flow and the injected coolant from the slot. In the later cases, the lip thickness to slot height ratio is a main factor on film cooling effectiveness due to the generated eddies behind the back step of slot lip. As the blowing rate increases, the film cooling effectiveness is enhanced for all cases due to the augmented momentum of injected coolant from the slot.

UR - http://www.scopus.com/inward/record.url?scp=77957848214&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957848214&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:77957848214

SN - 9781563479434

BT - 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

ER -

Lee KW, Song J, Oh MG, Yu MS, Cho HH, Ham HC et al. Heat transfer measurement on slot film cooling of ramjet combustor. In 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. 2008