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Keywords: heat transfer
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Proceedings Papers

Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT12A022, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104049
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT12A021, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104038
..., 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT11A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103503
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT12A007, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101672
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T09A013, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-105319
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7A: Heat Transfer — Combustors; Film Cooling, V07AT12A024, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104171
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A010, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102445
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A001, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-100383
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT15A010, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103389
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT15A004, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101162
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A015, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103467
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102138
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT14A009, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102491
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT14A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101188
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT14A006, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102294
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 12: Supercritical CO2, V012T28A032, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104180
... 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...
Proceedings Papers

Proc. ASME. GT2023, Volume 12: Supercritical CO2, V012T28A009, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101987
... 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...
Topics: Heat transfer
Proceedings Papers

Proc. ASME. GT2022, Volume 10B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing; Radial Turbomachinery Aerodynamics, V10BT30A016, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81945
...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...
Proceedings Papers

Proc. ASME. GT2022, Volume 1: Aircraft Engine; Ceramics and Ceramic Composites, V001T01A023, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82347
... 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...
Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A005, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-78519
... liftoff and increased film cooling effectiveness in row 2 by 65%. However, at low MFRs, increasing the density ratio reduced film cooling effectiveness in row 2 by 60%. Keywords: endwall film cooling, heat transfer, transonic, annular cascade, gas turbine. NOMENCLATURE A Area a Polynomial coefficient Cax...