...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...

... 20 06 2023 20 06 2023 28 07 2023 computational fluid dynamics (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...

...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...

... diameter should be determined by the cooling requirements. Additionally, when calculating the average blowing ratio B R ¯ , the film holes with mainstream intrusion were ignored. Table 5 Flow parameters with different film cooling hole diameters Parameters Film cooling hole...

... 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...

... ]. Investigations of direct flame-film cooling interactions are of great importance with the advent of new concepts (downsizing, giratory combustor) but are scarce due to the improved level of complexity [ 16 , 17 ]. Nevertheless, this configuration has recently received a particular attention with a newly elevated...

... 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...

... . 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 in the design of new aeroengine...

...) of ASME for publication in the J ournal of T urbomachinery . 26 04 2021 23 09 2021 23 09 2021 15 11 2021 heat transfer film cooling turbine blade tip measurement advancements In high-pressure turbines (HPT), complex over-tip-leakage (OTL) flow occurs within...

...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...

... be increased by decreasing the lens aperture, this approach is impractical as a large aperture is essential to maintain an acceptable signal-to-noise ratio (SNR). To solve these problems in the optical aerothermal measurements of film-cooled gas turbine blades, an approach combining the focal-sweep method...

... in subsonic linear cascade decades ago. Film cooling effectiveness and heat transfer coefficient (HTC) were measured under various blowing ratios and tip clearances [ 8 , 9 ], as well as for different hole locations [ 10 ]. In highly loaded turbine stage such as single stage HPT, flow can become transonic...

... involves an engine-representative combustor–turbine interface geometry, combustor coolant flow, and endwall film cooling flow injected upstream of a linear cascade. The approach flow conditions represent flow exiting a cooled, low-NOx combustor. This first part of this two-part study aims to understand...

...Mahmood H. Alqefl; Kedar P. Nawathe; Pingting Chen; Rui Zhu; Yong W. Kim; Terrence W. Simon Flow over gas turbine endwalls is complex and highly three-dimensional. As boundaries for modern engine designs are pushed, this already-complex flow is affected by aggressive application of film cooling...