Effect of slot gas injection to the flow field and coherent structure characteristics of a backstep flow

Harinaldi, Toshihisa Ueda, Masahiko Mizomoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The flow field and coherent structure of the flow over a backstep with slot-gas-injection were investigated. The mean flow, turbulence properties and coherent structure characteristics are significantly influenced by the increase of injection momentum near the step (/r/H=2). The mean flow field is characterized by recirculation zone splitting, with mass transfer of injected gas toward each part depending on the specific momentum ratio of injection. More mass entrainment, turbulence structures alteration in the shear layer and the hydrodynamic disturbances from the injection flow suppress the coherent structure velocity, size and detachment. These results provide basis information for achieving the balance of competing factors between geometrical and fluid dynamical parameters of injection to establish an efficient design of a combustor from the perspective of enhancing the gas-air mixing process.

Original languageEnglish
Pages (from-to)2711-2726
Number of pages16
JournalInternational Journal of Heat and Mass Transfer
Volume44
Issue number14
DOIs
Publication statusPublished - 2001 Jun 5

Fingerprint

gas injection
slots
Flow fields
Momentum
flow distribution
Turbulence
Gases
injection
Combustors
Mass transfer
Hydrodynamics
turbulence
momentum
Fluids
shear layers
entrainment
combustion chambers
Air
detachment
gases

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

Cite this

Effect of slot gas injection to the flow field and coherent structure characteristics of a backstep flow. / Harinaldi; Ueda, Toshihisa; Mizomoto, Masahiko.

In: International Journal of Heat and Mass Transfer, Vol. 44, No. 14, 05.06.2001, p. 2711-2726.

Research output: Contribution to journalArticle

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