Measurements of mass transfer coefficient and effectiveness in the recovery region of a film-cooled surface

W. P. Webster, Savas Yavuzkurt

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Mass transfer coefficients and film cooling effectiveness are measured downstream of a single row of holes (recovery region) inclined 30° with the surface and inline with the main turbulent boundary layer flow. The mass transfer coefficients are measured using a naphthalene sublimation technique. The effectiveness is determined through the injection of a trace gas into the secondary flow and measuring its concentration at the impermeable wall. Experiments are carried out in a subsonic, zero pressure gradient turbulent boundary layer, under isothermal conditions with three blowing ratios (Uj/U): 0.4, 0.8, and 1.2. The data is collected in a region 7-80 jet diameters downstream of the injection location. From the data on mass transfer coefficients and effectiveness obtained under the same flow conditions a general mass transfer equation is derived. This paper presents extensive data and discussions; and is believed to be one of the few studies in which both of these variables are measured on the same surface and in a large area in the recovery region.

Original languageEnglish (US)
Pages (from-to)781-789
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume30
Issue number4
DOIs
StatePublished - Jan 1 1987

Fingerprint

mass transfer
Mass transfer
recovery
Recovery
turbulent boundary layer
coefficients
injection
film cooling
secondary flow
boundary layer flow
Boundary layer flow
blowing
Secondary flow
Sublimation
Naphthalene
Blow molding
Pressure gradient
sublimation
pressure gradients
naphthalene

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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Measurements of mass transfer coefficient and effectiveness in the recovery region of a film-cooled surface. / Webster, W. P.; Yavuzkurt, Savas.

In: International Journal of Heat and Mass Transfer, Vol. 30, No. 4, 01.01.1987, p. 781-789.

Research output: Contribution to journalArticle

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