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Keywords: heat transfer
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Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A005, June 13–17, 2022
Paper No: GT2022-78519
... 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 Axial chord length CD Coefficient of discharge d...
Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT11A003, June 13–17, 2022
Paper No: GT2022-82067
..., a higher pressure drop consistently resulted in increased performance while higher flow speed resulted in reduced overall cooling performance. Keywords: effusion cooling, heat transfer, pressure drop, combustion, gas turbine NOMENCLATURE M Blowing Ratio DR Density Ratio I Momentum Flux Ratio U Velocity...
Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A031, June 13–17, 2022
Paper No: GT2022-82726
... measurements and thermal eld measurements are made to understand the performance variations and to compare with 7-7-7 SI (sharp inlet). Keywords: lm cooling, shaped holes, heat transfer, uid mechanics, experimental, thermal eld, adiabatic e ectiveness, optimization, gas turbine engines NOMENCLATURE hole...
Proceedings Papers

Proc. ASME. GT2022, Volume 6A: Heat Transfer — Combustors; Film Cooling, V06AT12A032, June 13–17, 2022
Paper No: GT2022-82755
... a Institute of Turbomachinery, Xi an Jiaotong University, Xi an 710049, China b Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China * Corresponding author: junli@mail.xjtu.edu.cn ABSTRACT Conjugate heat transfer (CHT) analyses were conducted to validate the accuracy...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT14A005, June 13–17, 2022
Paper No: GT2022-81791
... active clearance control cooling heat transfer experimental high temperature test impingement gas turbines Abstract The goal of the present work is to investigate the effects of target plate temperature on heat transfer features of representative active clearance control (ACC...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT14A004, June 13–17, 2022
Paper No: GT2022-81338
... low Rossby number condition centrifugal buoyancy-driven convection rotating cavity heat transfer large eddy simulation Abstract Flow and heat transfer in axial compressor disc cavities involve strong interaction of axial throughflow at the disc bores with centrifugal buoyant flow...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT13A011, June 13–17, 2022
Paper No: GT2022-82353
...) was utilized to study the turbulent heat transfer of supercritical methane in a horizontal pipe under forced convection. The results show that the thermo-physical properties of the working fluid change rapidly under high heat flux conditions, which leads to a non-uniform distribution of wall temperature...
Proceedings Papers

Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A028, June 13–17, 2022
Paper No: GT2022-83412
...Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-83412 EXPERIMENTAL AND NUMERICAL INVESTIGATION OF EFFECT OF INCLINATION ON SCO2 HEAT TRANSFER IN A CIRCULAR PIPE Emmanuel Gabriel-Ohanu, Alok Shah...
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
Paper No: GT2022-81945
... 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...
Proceedings Papers

Proc. ASME. GT2022, Volume 1: Aircraft Engine; Ceramics and Ceramic Composites, V001T01A023, June 13–17, 2022
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 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A004, June 13–17, 2022
Paper No: GT2022-79391
... 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...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT13A020, June 13–17, 2022
Paper No: GT2022-83024
... cascade rig for high-speed tip heat transfer research was developed. Both the design method and the rig performance are presented. Different from existing design method to match two-dimensional blade loading, this study shows there are other design flexibilities, such as assist blade tip gap, tailboard...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT13A012, June 13–17, 2022
Paper No: GT2022-82391
... and turbine blades made entirely by AM. Despite that, the effects of the increased surface roughness on friction and heat transfer are not fully understood yet and this hinders the design process demanding further characterization by means of experimental tests. Also the exploitation of CFD simulations...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A018, June 13–17, 2022
Paper No: GT2022-82198
..., such as the correlation between the velocity and the heat transfer coefficient fields. In present study, both the POD method and the EPOD method are applied and compared. The POD method allows to visualize the main modes in terms of velocity, temperature, and heat transfer coefficient fluctuations. With the help...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A027, June 13–17, 2022
Paper No: GT2022-83271
... Abstract In this work, the effect of spanwise deflection of a rotating smooth U-channel on flow and heat transfer characteristics is investigated through numerical simulation. Seven deflected U-channel with different angles are adopted, including α = 90°, 60°, 30°, 0°, −30°, −60°, −90...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A007, June 13–17, 2022
Paper No: GT2022-79595
... swirl rough heat transfer pressure gas turbine Abstract In the present study the effects of ribbed and grooved walls of swirl cooling chamber on heat transfer and fluid flow characteristics are investigated. This study presents ten roughened wall shapes that are compared with a smooth...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT13A018, June 13–17, 2022
Paper No: GT2022-82914
... AM DMLS roughness sand grain height CFD friction factor Nusselt number pressure loss heat transfer Abstract Additive Manufacturing (AM) in turbine technology enables the manufacture of complex and detailed shapes such as optimized cooling channel designs. However, the AM...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT13A019, June 13–17, 2022
Paper No: GT2022-83023
... heat transfer coupling effect turbine blade OTL flow gas-wall temperature ratio aerodynamic structure cooling effectiveness Abstract In high-pressure turbines, there is a large difference in temperature between the mainstream and the turbine blade surface. Most of the turbine blade...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A030, June 13–17, 2022
Paper No: GT2022-84169
... Abstract In this study, the heat transfer characteristics in a rotating lateral outflow trapezoidal channel with pin-fins, which is a typical model of the internal cooling passage in a turbine blade, were experimentally investigated under the Reynolds number range of 10,000–80,000, rotating...
Proceedings Papers

Proc. ASME. GT2022, Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V06BT15A026, June 13–17, 2022
Paper No: GT2022-82864
... consumption. This paper gives an overview of the design considerations and validation for a technology upgrade of an Ansaldo Energia heavy-duty gas turbine first stage stator heat shield. The heat transfer of the heat shield surface flow is influenced by the complex flow pattern that is created...