...Tianyou Chen; Le Cai; Jun Zeng; Weitao Zhang; Songtao Wang To rapidly and accurately predict turbine rotor blade losses within a wide range of incidences (−50–30 deg), graph neural networks (GNNs) are utilized to predict the aerodynamic parameters of two-dimensional turbine blades based on a small...

...Weichen Huang; Kechen Wang; Fei Zeng; Wenbin Chen; Wenwu Zhou; Xin Wen; Di Peng; Yingzheng Liu Roughness caused by deposition, erosion, and additive manufacturing can significantly affect gas turbine efficiency. Previous research has often examined film cooling performance under limited roughness...

... events and operates efficiently at both the design and off-design conditions. A mixed flow turbine (MFT) is not constrained to a radial inlet blade angle, allowing the peak efficiency to be shifted to a lower U/C _is , providing additional freedom to the designer. As the MFT leading edge varies in radius...

...Kingshuk Dasadhikari; Yoshihiro Kuwamura This paper presents a new, rapid, flexible approach for turbine blade section design combining algorithmic and inverse techniques to enable automatic generation of blade sections guaranteed to conform to multidisciplinary requirements, with the aim...

...Lakshya Bhatnagar; Guillermo Paniagua; Eugene Clemens; Matthew Bloxham Efficiency is an essential metric for assessing turbine performance. Modern turbines rely heavily on numerical computational fluid dynamics (CFD) tools for design improvement. With more compact turbines leading to lower aspect...

...Christopher Fuhrer; Nikola Kovachev; Damian M. Vogt; Ganesh Raja Mahalingam; Stuart Mann The growing demand of high flexibility and wide operating ranges of radial turbines in turbocharger applications necessitates new methods in the turbomachinery design process. Often, design criteria...

...Ahmed Farid Ayad Hassan; Fabian F. Müller; Markus Schatz; Damian M. Vogt Multi-channel casing (MC) shows promising results in controlling the performance of the radial turbines. It has neither movable parts nor complicated control mechanisms therefore it withstands higher thermal loads compared...

...Mahmood H. Alqefl; Kedar P. Nawathe; Pingting Chen; Rui Zhu; Yong W. Kim; Terrence W. Simon The first-stage turbine of a modern gas turbine is subjected to high thermal loads which lead to a need for aggressive cooling schemes to protect its components from melting. Endwalls are particularly...

... of particle retention as a function of a reduced set of independent variables relating to both the carrier gas flow and particle. Two-dimensional CFD simulations of particle deposition are performed on the General Electric E 3 nozzle guide vane using the existing, energy-based fouling of gas turbines (EBFOG...

...Kai Zhou; Chao Zhou Experimental and numerical methods were used to investigate the aerodynamic effects of a near-casing streamwise incoming vortex flow on the tip leakage flow of different tip geometries in an unshrouded high-pressure turbine. A flat tip, a cavity tip, and a suction side winglet...

...Marcel Börner; Reinhard Niehuis The results presented in this paper are based on experimental investigations on a generic transonic low pressure turbine profile at high subsonic exit Mach numbers. Here, the flow on the suction side reaches a maximum isentropic Mach number of approximately 1.2...

... edge turbine infrared fluid dynamics and heat transfer phenomena in compressor and turbine components of gas turbine engines heat transfer and film cooling turbine blade and measurement advancements Film-cooled jet engine airfoils conventionally feature a dense array of film cooling holes...

... surface where measurements are being made. The results of a detailed calibration show that the maximum local film effectiveness measurement error could be up to 0.05 if this effect were to go unaccounted for. Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication...

...Alessandro Romagnoli; Colin D. Copeland; Ricardo Martinez-Botas; Martin Seiler; Srithar Rajoo; Aaron Costall 1 Corresponding author. Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J OURNAL OF T URBOMACHINERY . Manuscript received August 16...

... are developed to deal with variations in the temperature profile and transient start time of each flow. The technique is applied to the analysis of the heat transfer within a low aspect ratio impingement channel with initial cross flow. Contributed by the International Gas Turbine Institute and presented...

...Jeffrey P. Bons Experimental measurements of skin friction c f and heat transfer (St) augmentation are reported for low speed flow over turbine roughness models. The models were scaled from surface measurements taken on actual, in-service land-based turbine hardware. Model scaling factors ranged...

...Markus Jo¨cker; Francois X. Hillion; Torsten H. Fransson; Ulf Wa˚hle´n This paper presents the detailed numerical analysis including parametric studies on the aerodynamic excitation mechanisms in a turbine stage due to the unsteady stator-rotor interaction. The work is part of the predesign study...

...Jeffrey P. Bons; Robert P. Taylor; Stephen T. McClain; Richard B. Rivir Results are presented for contact stylus measurements of surface roughness on in-service turbine blades and vanes. Nearly 100 turbine components were assembled from four land-based turbine manufacturers. Both coated...

...Jeffrey P. Bons; Rolf Sondergaard; Richard B. Rivir The application of pulsed vortex generator jets to control separation on the suction surface of a low-pressure turbine blade is reported. Blade Reynolds numbers in the experimental, linear turbine cascade match those for high-altitude aircraft...