...Chien-Shing Lee; Tom I-P. Shih; Douglas Straub; Justin Weber The adiabatic effectiveness of film cooling (η) has been characterized by the density (DR h ) and blowing (BR h ) ratios. In this study, dimensional analysis and computations based on Reynolds-averaged Navier–Stokes (RANS) were performed...

... as well as erosion of the thermal barrier coatings. The objective was to study the effects of partial blockages on film cooling effectiveness. Similar studies have been conducted on flat surfaces. This study includes the effect of curvature, which has been shown to be influential on film cooling...

... by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 19 08 2024 19 11 2024 19 11 2024 17 02 2025 high-pressure turbine blade tip gas turbine aerodynamic and thermal design film cooling heat transfer fan, compressor...

... hydrocarbon fuel. Changes of the surface conditions caused by deposition are able to affect film cooling and to enhance heat transfer substantially. However, the deposition layer has low-thermal conductivity (approximately 0.1 W · m −1 · K −1 ), which thermally insulates the wall from the hot gas...

...Ming-Feng Yeh; Timothy A. Burdett; Lesley M. Wright; Je-Chin Han Film-cooling effectiveness and leakage flow play crucial roles in turbine blade heat transfer. In contrast to the conventional trailing edge cutback squealer blade tip (CB tip), this study aims to compare the film-cooling...

...Qiong Wu; Hualiang Zhang; Zhao Yin; Afei Gao; Yu Liu; Yujie Xu; Haisheng Chen To enhance film cooling effectiveness and reduce mixing loss, it is imperative to understand the dynamics of the unsteady vortex system and its interaction with the mainstream flow. In this study, a comprehensive...

...Christopher Yoon; Elise M. Flachs; Molly E. Ellinger; David G. Bogard The overall cooling effectiveness for gas turbine airfoils is a function of the combined cooling due to internal cooling configurations and film cooling configurations. Typically, film cooling configurations are evaluated...

...S. Galeotti; T. Bacci; A. Picchi; B. Facchini; S. Cubeda Film-cooling injection significantly affects the thermal behavior of turbine vane surfaces. In addition to the beneficial effect of the film shielding the vane from the hot gas flow, alteration of the thermal boundary layer should also...

...Kechen Wang; Wenwu Zhou; Xin Wen; Di Peng; Yingzheng Liu Sweeping jet (SJ) is a self-excited flow control device that can generate continuous and periodic flow, which makes it a promising geometry for film cooling. However, the cooling performance of current SJ configurations is not significantly...

...Chen Li; Baitao An; Jianjun Liu The coolant jet interaction has a great influence on the superposition prediction of multirow film cooling. Although there have been many efforts to reveal the mechanics of additive effect in multirow film cooling, the available knowledge about developing...

... bases for the difference, separated in terms of changes in five local surface boundary conditions. We do this using a bespoke conjugate thermal model which includes models of both the internal cooling and the external film cooling layer. Three typical cooling architectures are studied. The results allow...

.... , and Dawes , W. N. , 1997 , “ Aerodynamic Aspects of Endwall Film-Cooling ,” ASME J. Turbomach. , 119 ( 4 ), pp. 786 – 793 . 10.1115/1.2841189 [10] Knost , D. G. , and Thole , K. A. , 2003 , “ Computational Predictions of Endwall Film-Cooling for a First Stage Vane ,” Proceedings...

... (CFD) heat transfer film cooling U.S. Department of Energy 10.13039/100000015 DE-FE0001730 The growth of additive manufacturing (AM) has significantly expanded the design space for gas turbine blade cooling geometries. As this technology has matured, an entirely new class...

...Izhar Ullah; Lesley M. Wright; Chao-Cheng Shiau; Je-Chin Han; Zhihong Gao; Andrea Stanton This work is an experimental study of film cooling effectiveness on two real-scale turbine vanes in a three-vane annular cascade. The cascade is connected to a high-flow steady compressor to provide...

... 09 01 2023 secondary flows film cooling combustor coolant impingement vortex Flow through a first-stage gas turbine vane passage is complex. Due to the geometry of the vanes, pressure gradients are created in the passage that cause secondary flows. Langston et al. [ 1 ] first...

... With Spent Fluid Removal Through Vent Holes on the Target Surface—Part I: Average Heat Transfer ,” J. Eng. Power , 102 ( 4 ), pp. 994 – 999 . 10.1115/1.3230372 [9] Ekkad , S. V. , Huang , Y. Z. , and Han , J. C. , 1999 , “ Impingement Heat Transfer on a Target Plate With Film Cooling...

... film cooling flame-cooling air interaction combustion chamber surface phosphor thermometry OH planar laser-induced fluorescence Agence Nationale de la Recherche 10.13039/501100001665 ANR-19-CE05-0007 Despite the numerous incentives to accelerate the energetic transition...

... and external cooling structures is very challenging and calls for non-intrusive, three-dimensional measuring techniques. As a response, this work utilizes magnetic resonance velocimetry (MRV) to measure the velocity field in a scaled turbine blade with engine-representative internal and film cooling structures...

...Mingyang Hao; Bo Bai; Yuanyuan Li; Zhigang Li; Jun Li With increasing aerodynamic and thermal loads, film cooling has been a popular technology integrated into the design of the modern gas turbine vane endwall, especially for the first-stage vane endwall. A staggering amount of research has been...

...Haiteng Ma; Wei Zeng; Siming Dai; Hongmei Jiang Film cooling, as a key technology to ensure turbine survival in new generation gas turbines, has been studied profusely in subsonic flows. But in transonic flow, the determination of adiabatic cooling effectiveness faces a dilemma in the state...