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
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781563479434
DOIs
Publication statusPublished - 2008

Publication series

Name44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

All Science Journal Classification (ASJC) codes

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

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