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  • J THREE-DIMENSIONAL SCROLL - NASA

    2020-8-6 · The turbine rotor was modified in such a way that the blades were removed and only the rotor hub was used in ids place. The scroll was originally part of a six kilowat single shaft Bsayton cycle spacc power system using a 0.1262 m (4.97 in.) radial inflow turbine. The design and fabrication details of the system are given in reference [51.

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  • Three-Dimensional Design and Optimization of a Transonic ...

    2013-3-25 · This paper presents a 3-D optimization of a moderately loaded transonic compressor rotor by means of a multiobjective optimization system. The latter makes use of a differential evolutionary algorithm in combination with an Artificial Neural Network and …

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  • A Three-Dimensional Computational Study of Pulsating

    2014-9-30 · Each of the volute limbs is found to be subject to a large degree of mass storage throughout a pulse cycle demonstrating a definite impact of the unsteady flow. The rotor wheel shows a much smaller degree of mass flow storage overall due to the pulsating flow; however, each rotor passage is subject to a much larger degree of mass flow storage due to the instantaneous …

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  • Investigation of the Three-Dimensional Flow Field Within a ...

    2020-8-6 · An experimental Investigation of the three-dimensional flow field through a low aspect ratio, transonic, axial-flow fan rotor has been conducted using an advanced laser anemometer (LA) system. Laser velodmeter measurements of the rotor flow field at the design operating speed and over a range of through-flow

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  • Three-dimensional wind simulation (Conference) | OSTI.GOV

    2021-6-19 · Technical Report Veers, P S. A method for numerically simulating a three-dimensional field of turbulent windspeed (the ''Sandia method'') for use in the aerodynamic and structural analyses of wind turbines is presented. The required inputs are single point power spectral densities (PSDs) and the coherence function.

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  • Three Dimensional Design and Optimization of a Transonic ...

    2012-5-3 · This paper presents a 3-D optimization of a moderately loaded transonic compressor rotor by means of a multi-objective optimization system. The latter makes use of a Differential Evolutionary Algorithm in combination with an Artificial Neural Network and a 3D Navier-Stokes solver. Operating it on a cluster of 30 processors enabled the optimization ...

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  • Numerical Unsteady Flow Analysis of a Turbine Stage With ...

    2002-7-10 · Comparisons to 2-D and steady 3-D results obtained with a fully viscous solver, VOLSOL, are made. The investigated design parameters are the axial gap (∼8–29 percent of rotor axial chord length) and the stator vane size and count (stator-rotor pitch ratio ∼1–2.75).

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  • Rotor Aerodynamic Design : Sandia Energy

    2018-7-26 · Vortex method based rotor design tools capture more of the physics of the interaction between the atmosphere, rotor, and the rotor wake, but at a higher computational cost than BEMT. For example, a free-wake BEVM can produce three-dimensional predictions of the rotor wake as well as wake velocity deficits, as shown in the two attached images.

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  • Ingestion Into the Upstream Wheelspace of an Axial Turbine ...

    1994-4-1 · The Denton three-dimensional C.F.D. computer code was used to predict the smoothed time-dependent pressure field for the rotor together with the pressure distribution downstream of the NGVs. The level and distribution of mainstream ingestion, and thus the seal effectiveness, was determined from nitrous oxide gas concentration measurements and related to static pressure …

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  • Rapid Calculations of Three-Dimensional Inlet Fan ...

    2020-8-6 · modeled using a new three-dimensional Euler code called CSTALL that solves the flow through the entire compression system but models blade rows using body forces for turning and loss. The body force model is described and it is shown how unknown terms in the model can be estimated from other Navier-Stokes solutions of the blade rows run separately.

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  • Three Dimensional Design and Optimization of a Transonic ...

    2012-5-3 · Three Dimensional Design and Optimization of a Transonic Rotor in Axial Flow Compressors ... Turbine Technical Conference and Exposition. Volume 7: Turbomachinery, Parts A ... Operating it on a cluster of 30 processors enabled the optimization of a large design space composed of the tip camber line and spanwise distribution of sweep and chord ...

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  • Three-Dimensional Unsteady Simulation in a Water Turbine ...

    This paper introduces the 3D numerical simulation of unsteady turbulent flow in the entire flow passage of a water turbine model with CFD technology. A new and available method for the design of a Francis turbine has been explored. The boundary conditions have been implemented based on the 3D averaged N-S equations. The governing equations are discreted on space by the finite …

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  • Rotor Aerodynamic Design : Sandia Energy

    2018-7-26 · Vortex method based rotor design tools capture more of the physics of the interaction between the atmosphere, rotor, and the rotor wake, but at a higher computational cost than BEMT. For example, a free-wake BEVM can produce three-dimensional predictions of the rotor wake as well as wake velocity deficits, as shown in the two attached images.

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  • Steam Turbines for Power Generation | GE Steam Power

    2021-7-23 · ARABELLE 1700. Nuclear reheat. Up to 75bar 300°C 1090psig 570F. 1200 - 1900MW. GE’s Arabelle turbine is the most powerful nuclear steam turbine in operation. Suiting all reactors type, from 700MW up to 1,900MW, the Arabelle is highly efficient, reliable, and cost effective. Learn more about Arabelle 1700.

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  • Space–time VMS computation of wind-turbine rotor and

    2013-7-13 · We present the space–time variational multiscale (ST-VMS) computation of wind-turbine rotor and tower aerodynamics. The rotor geometry is that of the NREL 5MW offshore baseline wind turbine. We compute with a given wind speed and a specified rotor speed. The computation is challenging because of the large Reynolds numbers and rotating turbulent flows, …

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  • 1996 Journal of Propulsion and Power Index

    2021-2-25 · Three-Dimensional Flowfield in a Turbine Noz-zle Passage B96-148 Solar Power Solar Radiation on Mars: Tracking Photovoltaic Array B96-061 Transient Exergy Analysis and Optimal Removal Time of a Cylindrical Storage System B96-062 Recent Advances in Solar Cell Technology B96-128 Clementine Gallium Arsenide/Germanium Solar Array B96-130

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  • The modeling and numerical simulations of wind turbine ...

    2015-10-1 · Aerodynamics model for turbine rotor. The aerodynamic forces on the blade are decided by three factors: the angle of attack (AOA), relative velocity and wind velocity. In this study, the turbine rotor blade is modeled by multiple bound vortex filaments and the nonlinear lifting line (circulation strength is expressed with nonlinear equation).

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  • Design Space of Foil Bearings for Closed Loop ...

    2015-8-12 · Kim, D. 'Design Space of Foil Bearings for Closed Loop Supercritical CO2 Power Cycles Based on Three-Dimensional Thermo-Hydrodynamic Analyses.' Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 7A: Structures and Dynamics. Montreal, Quebec, Canada. June 15–19, 2015. V07AT31A027. ASME.

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  • POD‐based analysis of a wind turbine wake under the ...

    2020-11-26 · The simulation layout is based on the experiments performed by Krogstad and Eriksen 45 using a turbine model with a three-bladed rotor of diameter and hub height . Detailed information about the blade design is given in Krogstad and Eriksen. 49 The tower is modeled as a cylinder with diameter equal to one-tenth of the rotor diameter, namely, .

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  • Mechanism and influence factors of hydraulic fluctuations ...

    2021-7-2 · In this study, a developed one-dimensional and three-dimensional (1 D-3D) coupling simulation method was adopted. Transient runaway transitions of a pump-turbine with three different inertias (0.5 J, 1 J, and 2.0 J) at three different guide vane openings (21°, 15°, and 12°, respectively) were simulated and compared.

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  • Steam Turbines for Power Generation | GE Steam Power

    2021-7-23 · ARABELLE 1700. Nuclear reheat. Up to 75bar 300°C 1090psig 570F. 1200 - 1900MW. GE’s Arabelle turbine is the most powerful nuclear steam turbine in operation. Suiting all reactors type, from 700MW up to 1,900MW, the Arabelle is highly efficient, reliable, and cost effective. Learn more about Arabelle 1700.

    Get Price
  • Mitsubishi Power, Ltd. | M701G Series

    2021-7-26 · High-performance large-capacity gas turbines for 50Hz power generation. In February 1997, the first unit of the 1,500°C Class M501G Series gas turbines came into commercial operation. This series features the use of steam for cooling combustors. Developed as a model with a similar design, the M701G Series for 50 Hz power generation began ...

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  • Mechanism and influence factors of hydraulic fluctuations ...

    2021-7-2 · In this study, a developed one-dimensional and three-dimensional (1 D-3D) coupling simulation method was adopted. Transient runaway transitions of a pump-turbine with three different inertias (0.5 J, 1 J, and 2.0 J) at three different guide vane openings (21°, 15°, and 12°, respectively) were simulated and compared.

    Get Price
  • Advanced Design of Turbomachinery — MIT Gas Turbine

    Advanced Design of Turbomachinery. It is an exciting time to be working in gas turbine technology! As industry strives for lower costs, better performance, and reduced emissions, new and challenging problems continue to emerge. With its high efficiency, rapid startup time, and large power density, the gas turbine will continue to play a large ...

    Get Price
  • Past Research — MIT Gas Turbine Laboratory

    A multidisciplinary effort, in cooperation with the MIT Micro Technology Laboratory, is underway to develop gas turbine and rocket engines a few millimeters in diameter spinning at 2-5 x 106 rpm. The devices would be capable of producing 10-50 watts of power or 10-30 grams of thrust.

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  • 1982 Journal of Energy Index

    2019-11-12 · Dynamic Rotor Loads of a Wind Turbine via Hand-Held Calculators E81-021 Subsystem Design ... Three-Dimensional Model of Spray Com-bustion in Gas Turbine Combustors E82-067 Prediction of the Flow, Reaction, and Heat ... Heat Pipe for Thermal Energy Storage Applications E82-066 Experimental Investigation of Closed Two-

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  • Balancing Efficiency and Stability in the Design of ...

    2013-11-14 · Rotor-Stator Interactions in a Four-Stage Low-Speed Axial Compressor—Part II: Unsteady Aerodynamic Forces of Rotor and Stator Blades J. Turbomach (October,2004) Direct Constrained Computational Fluid Dynamics Based Optimization of Three-Dimensional Blading for the Exit Stage of a Large Power Steam Turbine

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  • Mitsubishi Power, Ltd. | M701J Series

    2 天前 · The J Series gas turbines are an integration of the proven G Series and elemental technologies for temperature increase as a result of the Japanese national project for development of 1,700°C class gas turbines. They operate at a turbine inlet temperature of 1,600°C. Developed as a model with a similar design, the M701J Series for 50 Hz power ...

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  • Energy storage inherent in large tidal turbine farms ...

    2. Model. This work uses the GC05 model for a channel with a constant rectangular cross section. GC05 models the tidal turbine farm as an enhanced drag coefficient in a short narrow channel which connects two large water bodies, so large that they are unaffected by power extraction within the channel ().As in [] (hereafter V10), the starting point for the model is the along-channel, depth ...

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  • Steady-State Characteristics of a Dual-Rotor System With ...

    2018-8-30 · Using state-space vector, steady-state characteristics of dual-rotor system are analyzed through dual-rotor critical speed map, mode shapes, unbalance responses considering base rotations, frequency responses due to base motions, and shaft orbits. ... Simple Modeling and Analysis for Crankshaft Three-Dimensional Vibrations, Part 2: Application ...

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  • Mitsubishi Power, Ltd. | M701J Series

    2 天前 · The J Series gas turbines are an integration of the proven G Series and elemental technologies for temperature increase as a result of the Japanese national project for development of 1,700°C class gas turbines. They operate at a turbine inlet temperature of 1,600°C. Developed as a model with a similar design, the M701J Series for 50 Hz power ...

    Get Price
  • Energy storage inherent in large tidal turbine farms ...

    2. Model. This work uses the GC05 model for a channel with a constant rectangular cross section. GC05 models the tidal turbine farm as an enhanced drag coefficient in a short narrow channel which connects two large water bodies, so large that they are unaffected by power extraction within the channel ().As in [] (hereafter V10), the starting point for the model is the along-channel, depth ...

    Get Price
  • Past Research — MIT Gas Turbine Laboratory

    A multidisciplinary effort, in cooperation with the MIT Micro Technology Laboratory, is underway to develop gas turbine and rocket engines a few millimeters in diameter spinning at 2-5 x 106 rpm. The devices would be capable of producing 10-50 watts of power or 10-30 grams of thrust.

    Get Price
  • Balancing Efficiency and Stability in the Design of ...

    2013-11-14 · Rotor-Stator Interactions in a Four-Stage Low-Speed Axial Compressor—Part II: Unsteady Aerodynamic Forces of Rotor and Stator Blades J. Turbomach (October,2004) Direct Constrained Computational Fluid Dynamics Based Optimization of Three-Dimensional Blading for the Exit Stage of a Large Power Steam Turbine

    Get Price
  • Steady-State Characteristics of a Dual-Rotor System With ...

    2018-8-30 · Using state-space vector, steady-state characteristics of dual-rotor system are analyzed through dual-rotor critical speed map, mode shapes, unbalance responses considering base rotations, frequency responses due to base motions, and shaft orbits. ... Simple Modeling and Analysis for Crankshaft Three-Dimensional Vibrations, Part 2: Application ...

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  • Comparison of the Experimental Results Between a 2D EGV ...

    Today the exit guide vanes (EGV) of the turbine exit casing (TEC) of a bypass-engine have to fulfill three major functions. Firstly, they have to support the rear bearing of an aero engine and to provide space to lead through different supply lines, secondly the engine mount is supported and therefore they have to be rigid and large in thickness.

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  • Wake Alleviating Devices for Offshore Wind Turbines ...

    2015-3-13 · The wake behind an offshore wind turbine can persist for several turbine diameters, so decreasing the space between wind turbines in an array leads to strong wake-turbine interactions and a decrease in efficiency of the wind turbines downstream. The dominant structures in the wake of a horizontal axis wind turbine are large helical tip vortices.

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  • IJTPP | Free Full-Text | Pulsed Flow Turbine Design ...

    A preliminary analysis of turbine design, fit for pulsed flow, is proposed in this paper. It focuses on an academic 2D configuration using inviscid flows, since pressure loads due to wave propagation are several orders of magnitude higher than friction and viscous effects do not significantly impinge on the inviscid part, as previously shown by Hermet, 2021. As such, a large parametric study ...

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  • Wind turbine participation in micro‐grid frequency control ...

    WTG wind turbine generator FESS flywheel energy storage system BESS battery energy storage system PV photovoltaic panel FC fuel cell Parameters ρ air density in kg/m3 A the sweep area of wind turbine in m2 Vw wind speed in m/s X de-loading factor Cp turbine performance coefficient β blade pitch angle Pmax maximum power peak tracking in wind ...

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  • Guide to Spectral Proper Orthogonal Decomposition | AIAA ...

    2020-1-27 · I. Introduction. S pectral proper orthogonal decomposition (spectral POD, or SPOD) is an empirical method to extract coherent structures, or modes, from flow data. Alongside other operator- and data-driven decompositions employed in fluid mechanics [], the resulting modes can be used for a variety of purposes, from classification to reduced-order modeling to control.

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  • Advanced Design of Turbomachinery — MIT Gas Turbine

    Advanced Design of Turbomachinery. It is an exciting time to be working in gas turbine technology! As industry strives for lower costs, better performance, and reduced emissions, new and challenging problems continue to emerge. With its high efficiency, rapid startup time, and large power density, the gas turbine will continue to play a large ...

    Get Price
  • 1982 Journal of Energy Index

    2019-11-12 · Dynamic Rotor Loads of a Wind Turbine via Hand-Held Calculators E81-021 Subsystem Design ... Three-Dimensional Model of Spray Com-bustion in Gas Turbine Combustors E82-067 Prediction of the Flow, Reaction, and Heat ... Heat Pipe for Thermal Energy Storage Applications E82-066 Experimental Investigation of Closed Two-

    Get Price
  • Mechanism and influence factors of hydraulic fluctuations ...

    2021-7-2 · In this study, a developed one-dimensional and three-dimensional (1 D-3D) coupling simulation method was adopted. Transient runaway transitions of a pump-turbine with three different inertias (0.5 J, 1 J, and 2.0 J) at three different guide vane openings (21°, 15°, and 12°, respectively) were simulated and compared.

    Get Price
  • WES - Multipoint high-fidelity CFD-based aerodynamic

    2021-6-25 · Geometry-resolved large-eddy simulation of the NREL 5MW wind turbine, which shows velocity isosurfaces at 5.5 m/s after three rotor revolutions. Simulation was performed on the NERSC Cori system with Nalu-Wind, which is an unstructured-grid, low-Mach-Number computational fluid dynamics code (CFD).

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  • Research | Kenny Gruchalla, Ph.D.

    2011-10-31 · Main approaches being applied Direct numerical, large eddy, and detached eddy simulationsDNS/LES/DES Useful for problems where the sound is from turbulence Euler and Linearized Euler Equations (LEE) LEE very popular when viscous effects can be considered 2nd order as a source of sound Splitting methods Based on LEE, applied to specific unsteady fluid …

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  • Tutorial: Computational Methods for Aeroacoustics

    Abstract. Vortex-induced vibrations (VIVs) of wind turbine towers can be critical during the installation phase, when the rotor–nacelle assembly is not yet mounted on the tower. The present work uses numerical simulations to study VIVs of a two-dimensional cylinder in the transverse direction under flow conditions that are representative of wind turbine towers both from a fluid …

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  • WES - Two-dimensional numerical simulations of vortex ...

    Offshore Floating Wind Turbine-driven Deep Sea Water Pumping for Combined Electrical Power and District Cooling T Sant1, 2, D Buhagiar and R N Farrugia3 2Department of Mechanical Engineering, University of Malta, Msida MSD 2080, Malta 3Institute for Sustainable Energy, University of Malta, Marsaxlokk MXK 1531, Malta. E-mail: [email protected]

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  • Offshore Floating Wind Turbine-driven Deep Sea Water ...

    turbine in pump mode, but this analysis was undertaken just in the vaned distributor at low flow rate at one guide vanes opening. Detailed analysis for different discharge under different guide vanes openings of a pump turbine in pump mode has been not proposed. As for a pump turbine, vaned distributor is the vital component.

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  • Numerical Investigation in the Vaned Distributor under ...

    2019-6-19 · Guntur 2014 An evaluation of several methods of determining the local angle of attack on wind turbine blades 2018 Eva Jost Angle of Attack (AoA), turbine, Extracting the angle of attack on rotor blades from CFD simulations 2017 Jost, Eva, et al. 'Extracting the

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