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Keywords: heat transfer
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Journal Articles
Article Type: Research Papers
J. Turbomach. July 2022, 144(7): 071015.
Paper No: TURBO-21-1168
Published Online: May 27, 2022
... for publication in the J ournal of T urbomachinery . 15 07 2021 07 09 2021 08 09 2021 27 05 2022 heat transfer effusion cooling combustion fluid dynamics and heat transfer phenomena in compressor and turbine components of gas turbine engines heat transfer and film cooling...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2022, 144(9): 091001.
Paper No: TURBO-21-1147
Published Online: March 4, 2022
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081013.
Paper No: TURBO-21-1210
Published Online: March 4, 2022
...] Mazzei , L. , Andreini , A. , Facchini , B. , and Turrini , F. , 2016 , “ Impact of Swirl Flow on Combustor Liner Heat Transfer and Cooling: A Numerical Investigation With Hybrid Reynolds-averaged Navier–Stokes Large Eddy Simulation Models ,” ASME J. Eng. Gas Turbines Power , 138 ( 5...
Journal Articles
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081002.
Paper No: TURBO-21-1242
Published Online: March 3, 2022
...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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2022, 144(7): 071007.
Paper No: TURBO-21-1122
Published Online: February 25, 2022
...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...
Journal Articles
Article Type: Research Papers
J. Turbomach. June 2022, 144(6): 061003.
Paper No: TURBO-20-1378
Published Online: January 28, 2022
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2022, 144(5): 051002.
Paper No: TURBO-21-1082
Published Online: November 15, 2021
... 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. Email: lusp@sjtu.edu.cn...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041008.
Paper No: TURBO-21-1182
Published Online: November 10, 2021
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041006.
Paper No: TURBO-21-1054
Published Online: November 5, 2021
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011012.
Paper No: TURBO-21-1044
Published Online: September 21, 2021
..., 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. References [1] Bogard , D. G. , and Thole , K...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2021, 143(9): 091019.
Paper No: TURBO-21-1034
Published Online: July 26, 2021
... is provided in Fig. 1( a ) . Incidentally, the isolated peak just right of center in this figure is a near perfect trace of an ensemble-averaged incipient turbulent spot, which is the subject of this paper. boundary layer development laminar-to-turbulent transition heat transfer 29 01 2021...
Journal Articles
Article Type: Research Papers
J. Turbomach. November 2021, 143(11): 111011.
Paper No: TURBO-21-1026
Published Online: June 22, 2021
...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...
Journal Articles
Article Type: Research Papers
J. Turbomach. November 2021, 143(11): 111010.
Paper No: TURBO-21-1037
Published Online: June 21, 2021
... the aerodynamic flow topology and the effect of various cooling injection schemes on the heat transfer patterns. References [1] Denton , J. D. , and Cumpsty , N. A. , 1993 , “ Loss Mechanisms in Turbomachines ,” ASME J. Turbomach. , 115 ( 4 ), pp. 621 – 656 . 10.1115/1.2929299 [2...
Journal Articles
Article Type: Research Papers
J. Turbomach. November 2021, 143(11): 111002.
Paper No: TURBO-20-1206
Published Online: June 15, 2021
... ∞ = Re θ 2 Pr ∞ Δ T T ∞ 1 2 ( 1 + r i r o ) ( 1 − r i r o ) 3 The response of the system is the local Nusselt number on the side disks, which is the nondimensional form of the wall heat transfer coefficient defined as (6) Nu...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2021, 143(10): 101014.
Paper No: TURBO-20-1307
Published Online: May 19, 2021
..., 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. August 2021, 143(8): 081004.
Paper No: TURBO-20-1351
Published Online: April 26, 2021
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2021, 143(7): 071009.
Paper No: TURBO-20-1123
Published Online: April 19, 2021
..., the mainstream flows from both sides of the passage to the leading surface, increasing the flow velocity near the trailing surface. The local circumferential velocity gradient is also increased, especially in the channel-middle region. Accordingly, the heat transfer is improved on the trailing surface. The Nu...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2021, 143(7): 071003.
Paper No: TURBO-20-1283
Published Online: April 8, 2021
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. June 2021, 143(6): 061009.
Paper No: TURBO-20-1168
Published Online: April 8, 2021
...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...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2021, 143(3): 031004.
Paper No: TURBO-20-1224
Published Online: February 12, 2021
... 107,000 to 114,000. Full-coverage blowing ratios are constant with streamwise location along the test surface and range from 3.68 to 5.70. Corresponding louver slot blowing ratios then range from 1.72 to 2.65. Provided are heat transfer coefficient and adiabatic effectiveness distributions, which...