Effects of Cooling Films on the Heat Transfer Coefficient on a Flat Plate With Zero Mainstream Pressure Gradient

Hay, N.; Lampard, D.; Saluja, C. L.

doi:10.1115/1.3239667

Cited by 56 publications

(31 citation statements)

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“…1 were described [4][5][6][7][8][9][10]. The latter study showed it is important to have information of the film cooling effectiveness and the heat transfer coefficient.…”

Section: Introductionmentioning

confidence: 97%

Film cooling characteristics of rows of round holes at various streamwise angles in a crossflow: Part II. Heat transfer coefficients

Yuen¹,

Martinez-Botas²

2005

International Journal of Heat and Mass Transfer

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“…1 were described [4][5][6][7][8][9][10]. The latter study showed it is important to have information of the film cooling effectiveness and the heat transfer coefficient.…”

Section: Introductionmentioning

confidence: 97%

Film cooling characteristics of rows of round holes at various streamwise angles in a crossflow: Part II. Heat transfer coefficients

Yuen¹,

Martinez-Botas²

2005

International Journal of Heat and Mass Transfer

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“…Their measured results showed that little influence was observed on the film cooling for various mainstream boundary layer types. Effects of the mainstream pressure gradient and approaching boundary layer on the heat transfer coefficient on filmcooled surface were reported by Hay et al (1985) for both 35° and 90° simple angle injection. They also showed that the approach boundary layer has little influence on the heat transfer coefficient with secondary flow injection.…”

Section: Introductionmentioning

confidence: 99%

Effects of Compound Angle Injection on Flat-Plate Film Cooling Through a Row of Conical Holes

Chen

Lee

1998

Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration

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This paper presents the measured heat transfer and film cooling results over a flat plate as the secondary flow is ejected into the mainstream through a row of conical holes. A transient liquid crystal thermography was employed to derive the film cooling performance and heat transfer distribution over the test flat plate. Each conical injection hole, with a pitch-to-diameter ratio of 3 on the exit plane, had an expanded angle of 8 degrees. The effects of changing the spanwise injection angles and blowing ratios on both film cooling and heat transfer distributions were investigated. Test pieces in this study used

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“…The heat transfer coefficient ratio is almost equal to unity. Hay et al [21] presented the variation of the heat transfer coefficient ratio with the blowing ratio. They showed the effect of the blowing ratio increases the heat transfer coefficient ratio.…”

Section: A Review Of Studies On Heat Transfer Coefficientmentioning

confidence: 99%

CFD Simulations of Film Cooling Effectiveness and Heat Transfer for Annular Film Hole

Abdala

Elwekeel

2016

Arab J Sci Eng

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The increasing turbine entry temperature has placed demands for improvements in engine cooling, and the work described in this paper is the development of a new film cooling configuration to meet this demand. In this study, numerical simulations were performed to predict the improvement in film cooling performance with novel film hole called an annular film hole. The film cooling performance parameters such as heat transfer coefficient (h), film cooling effectiveness (η) and the net heat flux reduction (NHFR) over flat plate were investigated and compared with other configurations. Velocity profiles, pressure coefficient and turbulence kinetic energy contours were discussed. Four mass flow rates of secondary flow fluid were used to investigate the effects of film coolant velocity on the film cooling performance behavior. Results indicate that an annular film hole gives high film effectiveness, low heat transfer coefficient and higher NHFR compared to rectangular and circular film holes. The average values of laterally averaged film cooling effectiveness of the annular film hole increased to 106 and 328.5 % compared with the rectangular and circular film holes at moderate flow rate, respectively. This difference is attributable to decreasing the jet vertical velocity component in a case of the annular hole. Also the low and high heat transfer coefficient regions were described for annular hole in detail. B Antar M. M. Abdala

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Effects of Cooling Films on the Heat Transfer Coefficient on a Flat Plate With Zero Mainstream Pressure Gradient

Cited by 56 publications

References 0 publications

Film cooling characteristics of rows of round holes at various streamwise angles in a crossflow: Part II. Heat transfer coefficients

Film cooling characteristics of rows of round holes at various streamwise angles in a crossflow: Part II. Heat transfer coefficients

Effects of Compound Angle Injection on Flat-Plate Film Cooling Through a Row of Conical Holes

CFD Simulations of Film Cooling Effectiveness and Heat Transfer for Annular Film Hole

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