... as high as 10%. References [1] Bunker , R. S. , 2005 , “ A Review of Shaped Hole Turbine Film Cooling Technology ,” ASME J. Heat Transfer-Trans. ASME , 127 ( 4 ), pp. 441 – 453 . 10.1115/1.1860562 [2] Barigozzi , G. , Benzoni , G. , Franchini , G. , and Perdichizzi...

.... E. , Asere , A. A. , Gupta , M. L. , and Mkpadi , M. C. , 1985 , “ Full Coverage Discrete Hole Film Cooling: The Influence of Hole Size ,” Proceedings of the ASME 1985 International Gas Turbine Conference and Exhibit. Volume 3: Heat Transfer; Electric Power , Houston, TX , Mar. 18...

... presents Reynolds-averaged Navier–Stokes (RANS) conjugate heat transfer simulations that identify trends in cooling design performance as well as experimental measurements of overall effectiveness using a flat-plate matched-Biot number model with a simulated TBC layer of 0.42D thickness, where D...

... for publication in the J ournal of T urbomachinery . 25 08 2021 01 02 2022 01 02 2022 04 03 2022 computational fluid dynamics (CFD) fluid dynamics and heat transfer phenomena in gas turbine combustors heat transfer film cooling effusion modeling reduced-order model As far...

...Lorenzo Mazzei; Riccardo Da Soghe; Cosimo Bianchini It is well known from the literature that surface roughness significantly affects friction and heat transfer. This is even more evident for additive manufactured (AM) components, which are taking an increasingly important role in the gas turbine...

...Ce Liang; Yu Rao; Jianian Chen; Peng Zhang Experiments and numerical simulations under stationary and rotating conditions have been conducted to investigate turbulent flow and heat transfer characteristics of innovative guiding pin fin arrays in a wedge-shaped channel, which models the internal...

... experimental data, the numerical accuracy of VLES method was validated. With the VLES method, the unsteady heat transfer coefficient distributions on the squealer tip and total pressure loss in the blade passage were computed. The influences of coherent vortex structures on aero-thermal performance...

... system level. First-of-its-kind experimental results of spatially resolved tip heat transfer coefficient distribution at high relative casing Mach number are reported. The disk rotor rig design demonstrated in this paper can also be useful for other tip leakage flow studies. Fig. 11 High-speed disk...

... and unique surface roughness. Previous work in scaled passages analyzed pressure losses and friction factors associated with the rough surfaces, as well as investigated the velocity profiles and turbulent flow characteristics within the passage. In this study, the heat transfer characteristics of scaled...

... for inverse problems. Email: xinghaifeng@hit.edu.cn 1 Corresponding author. Email: leiluo@hit.edu.cn Email: hitdw9211@outlook.com Email: Wang_stao@126.com Contributed by the Heat Transfer Division of ASME for publication in the J ournal of T urbomachinery . 01 03 2021 25...

..., contributing to thickening of tip boundary layer and the plummet of skin friction on tip surface, which is responsible for the sharp decline of tip Nusselt number and therefore, formation of low heat transfer stripe downstream cooling injection. Email: jiang_plum@sjtu.edu.cn Email: BAbuYYB@163.com...

... , “ On the Distribution of Intermittency in the Transition Region of a Boundary Layer ,” J. Aero. Sci. , 24 ( 9 ), pp. 711 – 712 . [6] Albiez , H. , Gramespacher , C. , Stripf , M. , and Bauer , H.-J. , 2020 , “ High Resolution Measurements of Heat Transfer, Near-Wall Intermittency, and Reynolds...

...Daniel D. Fahy; Peter Ireland As a civil gas turbine cools down, asymmetric natural convective heat transfer causes the bottom sector of the rotor to cool faster than the top; this circumferential thermal gradient can potentially cause the shaft to deflect – a phenomenon called thermal or “rotor...

... the aerodynamic flow topology and the effect of various cooling injection schemes on the heat transfer patterns. This manuscript presents the results of an extensive numerical effort, optimizing the aerothermal performance of both uncooled and cooled turbine tip designs, adopting fully arbitrary squealer rim...

... . 10.1115/1.2927991 [4] Farthing , P. , Long , C. , Owen , J. , and Pincombe , J. , 1992 , “ Rotating Cavity With Axial Throughflow of Cooling Air: Heat Transfer ,” ASME J. Turbomach. , 114 ( 1 ), pp. 229 – 236 . 10.1115/1.2927990 [5] Bohn , D. E. , Deutsch , G. N...

..., the heat transfer performance over the rib-dimpled surface was investigated using transient liquid crystal thermography. The flow field measurements were correlated with the heat transfer measurements to elucidate the underlying physical mechanism of the improvement in thermal efficiency due to the micro...

... in the high-speed cascade wind tunnel of the Institute of Jet Propulsion to quantify the influence of heat transfer on the temperature distribution in the wake and, finally, the profile loss. For this purpose, a patented five-hole probe with an integrated thermocouple was developed and applied for steady...

... investigations used a straight channel or a U-shaped channel to investigate the heat transfer on the trailing edge channel; accordingly, the results had limitations. Recently, the heat transfer distributions of a rotating serpentine channel were investigated at a low rotation number [ 32 ]. The current paper...

...Izzet Sahin; I-Lun Chen; Lesley M. Wright; Je-Chin Han; Hongzhou Xu; Michael Fox In the current study, the heat transfer and pressure drop characteristics of a rotating, partial pin-finned, cooling channel that has a trapezoidal cross section and converges from the hub to tip in both the streamwise...

... have a range of cooling feature sizes and, because of the inherent three-dimensionality, a wide range of build angles. Previous studies have shown that AM built directions influence internal channel surface roughness that, in turn, augment heat transfer and pressure loss. This study investigates...