... characteristics. These factors can contribute in crack development in turbine blades. In this study, steady and unsteady conjugate heat transfer (CHT) simulations were performed to investigate the heat transfer and aerodynamics of the first stage of the W501F cooling blade. Factors such as internal cooling...

...-structured ribs within the internal cooling channels of gas turbine blades to improve heat transfer performance. Conjugate heat transfer analysis evaluates the effectiveness of these ribs. The methodology’s accuracy was affirmed by comparing the results with those of a channel featuring fully-filled ribs...

... Abstract In impingement cooling, it is important to consider eliminating the influence of crossflow to improve the heat transfer coefficient. Therefore, in this work, the effects of shape modification on the leading edge impingement cooling for the turbine blade with crossflow conditions have...

... Abstract The analysis and the design of effective cooling schemes is essential for the integrity of turbomachinery components. Therefore, an accurate prediction of temperatures in critical devices is a necessity. This also applies to electrical turbomachinery such as hydropower generators...

.... This study examines various lattice and TPMS structures, like Gyroid, Diamond, and BCC, alongside conventional channels and pin fins. Using steady-state CFD, it analyses pressure drop and heat transfer covering Reynolds numbers from 10,000 to 40,000, representative of gas turbine cooling applications...

... these technologies, additive manufacturing has emerged as a game changer. In its early stages, additive manufacturing primarily focused on aspects such as powder morphology, process optimization and material properties characterizations. However, it quickly paved the way for the creation of innovative cooling...

... Abstract Ceramic Matrix Composites (CMCs) offer great potential for developing lighter and more efficient aero-engines. Due to their high temperature capability, CMCs are mainly used in the hot gas section in order to replace cooled metallic components and thus save cooling air. Especially CMC...

... and their impact on the cycle. In addition, the fuel burn on aircraft system level is assessed with exchange factors for thrust specific fuel consumption and propulsion system weight. A cooling air model for conceptual design which covers the main effects of steam injection on the required cooling air mass flow...

... pump or the ignitor, have certified temperature limits that must not be exceeded. In order to control the thermal environment around the APU, where these equipment are located, the bay needs to be cooled down when the APU is in operation. In this study, bay cooling is achieved with an ejector system...

...Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-81945 A REVIEW OF HIGH-SPEED ROTATING HP TURBINE HEAT TRANSFER AND COOLING STUDIES OVER THE LAST DECADE IN THE OXFORD TURBINE RESEARCH FACILITY Chiara...

... Abstract In this study, the influence of grid resolution and inflow turbulence on the prediction of gas temperature distribution around HP-turbine blades and the effectiveness of cooling flows are assessed by means of a comparative, systematic study with increasing grid resolution, starting...

... and that offer reduced weight and better thermal performance. This is of particular relevance for gas turbine cooling as well, as proved by the first applications of combustors and turbine blades made entirely by AM. Despite that, the effects of the increased surface roughness on friction and heat transfer...

... Abstract The reduction of cooling air for first stage turbine components plays a vital role in improving the performance of heavy-duty gas turbines. To achieve this goal detailed knowledge of the external heat loads is required as well as introducing novel technologies to reduce the cooling air...

... different cooling conditions. The THP material exhibited excellent durability during testing at high circumferential speeds above 580 m/s. More than 2,000 temperature measurements were obtained on pre-selected locations on the surface of the wheels. The test demonstrates that THP can be used on components...

... cool a flat target surface, which is replicated by a metal plate in the experimental setup. A steady-state technique with controlled wall heat flux is used to measure averaged heat transfer values along the target plate. The target plate is composed by a series of insulated blocks to limit lateral...

... pressures and metal temperatures. These measurements indicated that both the aerodynamic and cooling performances of the turbine blades and vanes are highly consistent and repeatable over a range of operating conditions. Detailed comparisons of the measured engine pressures and temperatures with predictions...

... to obtain temperatures. The maximum temperature profile of the surface can be determined through a customized calibration. Given the complex cooling system of a combustor, the high temperatures and the long-time exposure, this case offers a unique possibility for the testing of the coating under real engine...

... in a single row. The jets generated by such holes cool a flat target surface, which is replicated by a metal plate in the experimental setup. Measurements are performed using the steady-state technique, obtained by heating up the target plate thanks to an electrically heated Inconel foil applied on the side...

... in the generation of a more validated and general methodology for the high-fidelity CFD analysis of additive-manufactured components. gas turbine roughness additive manufacturing cooling heat transfer CFD correlation Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference...

... Abstract The Inside-out ceramic turbine (ICT), a novel microturbine rotor architecture, has an air-cooled ring which keeps its composite rotating structural shroud within operating temperature. The cooling ring must achieve a significant radial temperature gradient with a minimal amount...