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Keywords: Heat transfer
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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. Table 1 Geometry of turbine blade and tip cooling holes...
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
...: 1808871588@qq.com Contributed by the Heat Transfer Division of ASME for publication in the J ournal of T urbomachinery . 20 05 2020 20 01 2021 25 01 2021 19 04 2021 turbulated serpentine channel rotation heat transfer outflow ratio heat transfer and film cooling...
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. 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. 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. February 2021, 143(2): 021009.
Paper No: TURBO-20-1220
Published Online: February 2, 2021
... vortical structures depend highly on the Reynolds number. A transient thermochromic liquid crystal (TLC) technique is used to obtain local heat transfer coefficients on the endwall which are then discussed in the context with the vortical structures. The structure of the horseshoe vortex and the transient...
Journal Articles
Article Type: Research Papers
J. Turbomach. February 2021, 143(2): 021001.
Paper No: TURBO-20-1164
Published Online: February 1, 2021
...Zekun Zheng; Xinyan Pei; Siqian Yan; Lingyun Hou Liquid-fuel regenerative cooling is a promising turbine cooling technology. We developed a numerical model of heat transfer coupled with oxidation deposition in a rotatory channel for regenerative cooling applications. Source terms...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2021, 143(1): 011008.
Paper No: TURBO-20-1204
Published Online: December 29, 2020
...Yu Xia; Patrick Sharkey; Stefano Orsino; Mike Kuron; Florian Menter; Ishan Verma; Robert Malecki; Baris Sen Accurate numerical prediction of surface heat transfer in the presence of film cooling within aero-engine sub-components, such as blade effusion holes and combustor liners, has long been...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2021, 143(1): 011001.
Paper No: TURBO-20-1091
Published Online: December 23, 2020
... side of the effusion plate. This flow is constrained by two no-slip walls. The upstream effusion wall is assigned a constant temperature boundary condition ( T = 1105 K) estimated using the external temperature and a 1D heat transfer approximation, and the top wall is assumed adiabatic...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2020, 142(9): 091011.
Paper No: TURBO-20-1060
Published Online: August 25, 2020
...: jb753@cam.ac.uk Email: gp10006@cam.ac.uk Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 27 02 2020 09 04 2020 09 04 2020 25 08 2020 heat transfer film cooling unsteady flow...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2020, 142(9): 091012.
Paper No: TURBO-19-1218
Published Online: August 25, 2020
...Xin Yan; Mingliang Ye; Kun He Heat transfer and aerodynamic performance in worn squealer tip gap of a high-pressure gas turbine stage were numerically investigated. Effects of the starting location of wear and wear depth on tip heat transfer coefficient distributions and stage efficiency were...