...) Si = vane span at the inlet of cascade (mm) Cax = vane axial chord length (mm) MFR = ratio of the film coolant mass flowrate to mainstream flow (−) secondary flows film cooling combustor coolant impingement vortex References [1] Langston , L...

... 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...

... 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 Holes ,” J...

... 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...

... the incoming air [ 13 – 15 ]. 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...

... 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...

... with the complete discretization of effusion holes results in computational resources which are generally too high for an industrial context. Consequently, large research efforts have been devoted to the development of low-order approaches to model the film cooling injection. Current trends in the design of new...

... Corresponding author. Email: QZhang@sjtu.edu.cn Email: li.he@eng.ox.ac.uk Contributed by the International Gas Turbine Institute (IGTI) 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...

...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...

...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...

... 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...

.... , and Metzger , D. E. , 1995 , “ Heat Transfer and Effectiveness on Film Cooled Turbine Blade Tip Models ,” ASME J. Turbomach. , 117 ( 1 ), pp. 12 – 21 . 10.1115/1.2835630 [4] Bunker , R. S. , 2001 , “ A Review of Turbine Blade Tip Heat Transfer ,” Ann. N. Y. Acad. Sci. , 934 ( 1 ), pp...

...Zhen Zhang; Hui Li; Xinrong Su; Xin Yuan The performance of film cooling is influenced by many parameters, and the nonuniform flow caused by the internal cooling system is found to largely affect the film cooling, which further complicates the in-hole flow and draws new difficulties in predicting...