Volume 5B: Heat Transfer 2015
DOI: 10.1115/gt2015-42565
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Abstract: The thermal efficiency of gas turbine engines increases with turbine inlet temperature (TIT) directly. However, the TIT is limited by the allowable temperature of current blade materials. Film cooling technique is an effective method to maintain turbine vane working smoothly under high TIT conditions. The adiabatic film effectiveness has been widely employed to understand film cooling mechanism. Therefore, the prediction of the adiabatic effectiveness of gas turbine engines under real operating conditions is e… Show more

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“…Moreover, the distributions of φ and φ TBC are more uniform than that of τ due to the lower thermal conductivity of TBC. The distribution of τ is similar to the distributions of the adiabatic film effectiveness obtained by adiabatic assumption in our previous work [28,29]. This phenomenon is reasonable because the thermal conductivity of TBC is much lower than that of the vane's material, and TBC reduces the heat flux transferred into the solid structure; (2) At each Tu, the relatively lower τ, φ, and φ TBC always happen near the tip and the hub of the vane, because it is difficult to cool those regions effectively by the cooling air emitted from the film holes.…”
Section: Overall Cooling Effectiveness and Tbc Effectivenesssupporting
confidence: 58%
“…Moreover, the distributions of φ and φ TBC are more uniform than that of τ due to the lower thermal conductivity of TBC. The distribution of τ is similar to the distributions of the adiabatic film effectiveness obtained by adiabatic assumption in our previous work [28,29]. This phenomenon is reasonable because the thermal conductivity of TBC is much lower than that of the vane's material, and TBC reduces the heat flux transferred into the solid structure; (2) At each Tu, the relatively lower τ, φ, and φ TBC always happen near the tip and the hub of the vane, because it is difficult to cool those regions effectively by the cooling air emitted from the film holes.…”
Section: Overall Cooling Effectiveness and Tbc Effectivenesssupporting
confidence: 58%