... conventional pin fin arrays. Here, a lattice structure with microchannels is introduced. The study presents the changes in heat transfer due to the substitution of the heat transfer medium and the new geometry. The component is assumed to be printed Inconel 718. Based on an oxy-fired combustion sCO2 power...

... to stay below the seal allowable temperature; this requirement has been even amplified in the last years with the DGS application to hot turbomachinery. Nowadays, numerical Conjugate Heat Transfer (CHT) analysis is a good industrial practice to quantify the thermal distribution in turbomachinery...

... Abstract In this paper, numerical simulation has been conducted to investigate the heat transfer and flow characteristics for cooling schemes which combine pin-fins and ribs. A pin-fin internal cooling channel with an aspect ratio 4:1 was used as baseline, where the pin-fin height-to-diameter...

... performance. In this study, several crossflow mitigation techniques are investigated by attaching small and easy-to-manufactured crossflow diverters to protect jet cores from upstream crossflows and, therefore, enhance heat transfer performance. Three diverter shapes of cylindrical, rectangular, and ribbed...

... Abstract Thermal management of turbine airfoils is a critical design consideration, but the impact of unsteadiness on heat transfer of attached flow regions has received less attention in the literature. When turbine surfaces are subjected to unsteady zero-mean flow fluctuations, either...

... Abstract Direct numerical simulations of incompressible turbulent forced convection over irregular, anisotropic surface roughness in a pressure-driven plane channel flow have been performed. Heat transfer was simulated by solving the passive scalar transport equation with Prandtl number Pr...

... with axial throughflow. Unsteady Reynolds-averaged Navier-Stokes (RANS) simulations and large eddy simulations (LES) are compared with experimental data and previous direct numerical simulation (DNS) and LES results. The results demonstrate Code_Saturne’s capabilities for predicting flow and heat transfer...

... Abstract In gas turbines, the stator wells play a key role in the efficiency of the turbomachine. The research for performance gains requires a good understanding and an accurate modelling of the flows and heat transfers occurring in these areas. Indeed, engineers try to maintain sustainable...

... Abstract The clearance of compressor blade tips during aero-engine accelerations is an important design issue for next-generation engine architectures. The transient clearance depends on the radial expansion of the compressor discs, which is directly coupled to conjugate heat transfer in co...

... the serpentine channel compared to the coflow channel. internal cooling film cooling shaped holes experimental heat transfer pressure drop serpentine channel overall effectiveness Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference and Exposition GT2023 June 26-30, 2023...

... number heat transfer fluid mechanics numerical RANS gas turbine engines Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference and Exposition GT2023 June 26-30, 2023, Boston, Massachusetts, USA GT2023-104049 CONSIDERATIONS FOR COMPRESSIBLE FILM COOLING: A COMPUTATIONAL STUDY...

..., there is a marked decrease in film cooling hole performance as the Mach number is increased. film cooling shaped holes transonic compressible Mach number heat transfer fluid mechanics experimental gas turbine engines Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference...

... demand, high effectiveness and uniform structure. Moreover, it is also utilized in afterburner systems to pursue desired thrust for sufficient time. The main purpose of the present research is to provide overall cooling effectiveness and heat transfer calculation method for state-of-art effusion cooled...

... that the film cooling effectiveness can be further improved by adjusting the shape parameters of the butterfly-shaped hole. gas turbine heat transfer film cooling advanced shaped hole Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference and Exposition GT2023 June 26-30, 2023...

... environmental impact. However, windage loss significantly contributes to total losses in high-speed rotating machines such as the flywheel. Windage loss increases self-discharge, rendering FESS unsuitable for long-term energy storage applications. In the FESS application, the enhancement of heat transfer...

... scan imaging technique are presented. The performances are characterized both in terms of averaged heat transfer and friction factor values inside the test coupons by means of steady-state technique with a constant wall temperature boundary condition. The investigated flow Reynolds numbers range from...

... Abstract Knowledge of heat transfer in fuel wetted passages is important for informing injector design and life estimates due to the effects of temperature on fuel degradation. Future injectors will be manufactured using additive methods in an effort to reduce production costs and time, while...

... turbine experimental testing heat transfer aerodynamics cooling combustor turbine interaction 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...

... with dimple/protrusion/pin fin is proposed to increase the heat transfer and decrease the blade surface temperature in the trailing region. This paper numerically investigated the conjugate heat transfer characteristics in a vane blade with different dimple/protrusion/pin fin configurations for trailing...

... of electrical machine under temperature constraints of stator winding, lumped thermal network is established to derive the requirement of heat transfer coefficients of the cooling fin. Then, from engineering feasibility, three different cooling fin designs including straight type, arc-shape type and airfoil...