...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...

...Chen Li; Baitao An; Jianjun Liu The coolant flow condition at the film hole entrance has a notable effect on film cooling effectiveness. The previous studies about internal ribbed crossflow effects are the hole with a circular inlet cross section. In this study, a diffusion slot hole with a race...

...Matthew J. Horner; Christopher Yoon; Michael Furgeson; Todd A. Oliver; David G. Bogard Few studies in the open literature have studied the effect of thermal barrier coatings (TBC) when used in combination with shaped hole film cooling and enhanced internal cooling techniques. The current study...

... 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 Current trends...

... film cooling turbine blade tip measurement advancements In high-pressure turbines (HPT), complex over-tip-leakage (OTL) flow occurs within the clearance gap between the rotor blade and the casing. Previous studies indicate that there are significant changes in the OTL flow field due...

...Haifeng Xing; Lei Luo; Wei Du; Songtao Wang The direct prediction model for adiabatic film cooling effectiveness distribution and inverse prediction model for design parameters are studied in this article. Convolutional neural networks (CNNs) are trained on a set of simulated adiabatic film cooling...