1991
DOI: 10.1515/tjj.1991.8.3-4.235
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Prediction of Heat Transfer Characteristics for Discrete Hole Film Cooling - One Row of Injection Into a Turbulent Boundary Layer

Abstract: A two-dimensional (2-D) injection model for the discrete hole film cooling process is developed. The injection model is used with a low Reynolds number k -e turbulence model to predict the spanwise averaged effectiveness (η) and the heat transfer coefficient (hf) for one row of injection into a turbulent boundary layer.The three-dimensional effect of discrete hole injection is introduced in the prediction scheme by developing the concept of "entrainment fraction" and "entrainment enthalpy." The "entrainment fr… Show more

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Cited by 3 publications
(13 citation statements)
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“…The injectant sta gnation enthalp y (or energy) profile differs substantiall y from the original form proposed b y Yavuzkurt and Tafti ( 1988Tafti ( , 1989, and subsequently used by Neelakantan and Crawford (1995). In the new formulation, the restart (afterinjection) enthalp y profile is a scaled profile based on a semiempirical model for the temperature profile on an adiabatic surface.…”
Section: Dispersion Modelmentioning
confidence: 97%
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“…The injectant sta gnation enthalp y (or energy) profile differs substantiall y from the original form proposed b y Yavuzkurt and Tafti ( 1988Tafti ( , 1989, and subsequently used by Neelakantan and Crawford (1995). In the new formulation, the restart (afterinjection) enthalp y profile is a scaled profile based on a semiempirical model for the temperature profile on an adiabatic surface.…”
Section: Dispersion Modelmentioning
confidence: 97%
“…The governing equations are the time averaged boundary layer equations for conservation of mass, momentum and stagnation enthalpy (energy), as listed in Crawford, Kays, and Moffat (1980). The film cooling model that accompanies these equations is comprised of an injection model, adapted in part from Yavuzkurt and Tafti (1988Tafti ( , 1989 and modified herein, and a dispersion model as source terms added to the governing Schmidt et al (1994) and Sen etal. (1994) momentum and stagnation enthalpy equations, based on the work of Schonung and Rodi (1987).…”
Section: Problem Formulationmentioning
confidence: 99%
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“…The present authors (Tafti and Yavuzkurt, 1988) developed an injection model and used it with a low Reynolds number k-e model boundary layer code. The effect of 3-0 entrainment is introduced in the 2-D prediction scheme by using an "entrainment fraction" and an "entrainment enthalpy."…”
Section: Introductionmentioning
confidence: 99%