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  • Three-Dimensional Solid Modeling of Large Wind

    According to Wilson theory and BEM theory, Matlab was used to calculate chord length, torsional angle and coordinate transformation. The coordinates were outputted automatically. The result obtained from the program was transmitted directly into Pro/E, and the 3D modeling of large wind turbine …

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  • Three-Dimensional Design and Optimization of a

    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 a 3D Navier-Stokes solver.

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  • A Three-Dimensional Computational Study of

    2014-9-30 · A Three-Dimensional Computational Study of Pulsating Flow Inside a Double Entry Turbine. Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J OURNAL OF T URBOMACHINERY. Manuscript received July 7, 2014; final manuscript received July 11, 2014; published online September 30, 2014.

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  • Evaluation of the 3D Printing Accuracy of a Dental Model ...

    2020-11-29 · Abstract: The amount of photopolymer material consumed during the three-dimensional (3D) printing of a dental model varies with the volume and internal structure of the modeling data. This study analyzed how the internal structure and the presence of a cross-arch plate influence the accuracy of a 3D printed dental model.

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  • Three-dimensional simulation of unsteady flows in a

    2016-5-12 · Three-dimensional numerical simulation for a prototype pump-turbine has been performed to investigate the transient characteristics and flow behaviors in the startup process. The rotational speed, which varies with runner torque and inertial of the rotating systems, is obtained by hydraulic-force coupling method.

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  • Energy Analysis in a Pump-Turbine During the Load ...

    However, the underlying fluid mechanism is not clear. In order to solve these problems, in this study, a three-dimensional (3D) transient turbulent flow in a pump-turbine, with clearance during the load rejection process, was simulated using the method of coupling of the rigid rotor motion with flow and dynamic mesh technology.

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  • Numerical modelling and optimization of vertical axis

    2021-6-1 · In this paper 25 different layouts were investigated. Results show that VAWTs increase each other’s performance by up to 15%, and this optimal layout was for a turbine spacing of three turbine diameters, an array angle, β, of 60°, and when the rotors were co-rotating. Yet, this layout was at the limit of the scope, and the other results indicated an optimal angle around 75°, hence the augmentations …

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  • Numerical Unsteady Flow Analysis of a Turbine Stage

    2002-7-10 · The work is part of the predesign study of a high-pressure subsonic turbine for a rocket engine turbopump. The pressure level in such turbines can be remarkably high (in this case 54 MPa inlet total pressure). Hence, large unsteady rotor blade loads can …

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  • On motion analysis and elastic response of floating ...

    2021-5-15 · dual linear pounding tuned mass dampers to mitigate the three-dimensional vibrations of the wind turbine. Similarly, the authors in [12] propose a novel approach for optimizing the design parameters of the TMD (i.e., stiffness, damping, and installation location) to effectively reduce the vibrations of a spar-buoy turbine. Stewart and Lackner have used

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  • Steam Turbines for Power Generation | GE Steam Power

    2021-6-28 · 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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  • Evaluation of the 3D Printing Accuracy of a Dental Model ...

    2020-11-29 · Abstract: The amount of photopolymer material consumed during the three-dimensional (3D) printing of a dental model varies with the volume and internal structure of the modeling data. This study analyzed how the internal structure and the presence of a cross-arch plate influence the accuracy of a 3D printed dental model.

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

    2014-6-8 · 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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  • Dynamic instability of a pump-turbine in load

    2018-3-21 · Load rejection is one of the most crucial transient processes in pump-turbines. However, only a few achievements on the internal flow mechanism of pump-turbines in load rejection processes have been presented. In this study, firstly, the load rejection process in a pump-turbine was simulated with a three-dimensional unsteady turbulent numerical method using the technology of dynamic mesh and ...

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  • Stability and dynamic analysis of doubly-fed variable ...

    The closed space composed of these two surfaces and the K i = 0 plane and the K d = 0 plane is the three-dimensional stability domain of the VSPTGS in turbine mode. Download : Download high-res image (120KB) Download : Download full-size image; Fig. 6. Hopf bifurcation point in turbine mode.

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  • Analysis of a Quasi-Two-Dimensional Flamelet Model

    2021-5-28 · Three-feed combustion systems in which fuel gas, oxygen, and diluent ( \hbox {CO}_{2} CO 2 ) are issued into a combustor are key components to realize an oxy-fuel type gas turbine in a zero-emission plant. Yet, simulations of such systems using mixture fraction-based models are difficult, since multiple mixture fractions are required to describe the system. In this study, large-eddy ...

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  • Numerical modelling and optimization of vertical axis

    2021-6-1 · The two-dimensional simulations showed that for a turbine spacing of 1.2D, the power coefficient was 15% higher for both turbines. Additionally, the three-dimensional simulations found an increase of at least 8%. Finally, Brownstein et al. conducted experiments of a pair of 5-bladed VAWTs in an open circuit, subsonic wind tunnel.

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  • Solving Large-Scale Optimization Problems with

    2019-9-24 · A hybrid energy storage system using pump compressed air and micro-hydro turbine. Renew Energy, 2014, 65: 117–122. Google Scholar 15. Zhang Y, Zheng X, Li J, et al. Experimental study on the vibrational performance and its physical origins of a prototype reversible pump turbine in the pumped hydro energy storage power station.

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  • Investigation on reversible pump turbine flow

    2019-6-19 · tidal turbine σ - local pressure coefficient (eq 6, lust, 2017) σ = 2(p ∞ - p l)/(ρ U rel 2) P l: local pressure at a given point on the surface of the turbine blade U ref: relative seen by blade profile U ref = U ∞ 2 + (ω r) 2 Ronsten, G., (1991). ®Static pressure

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  • Mitsubishi Power, Ltd. | M701G Series

    2 天前 · 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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  • Fluid Mechanics and Thermodynamics of Turbomachinery

    2016-10-24 · Chapter 6 covers three-dimensional effects in axial turbomachinery and it possibly has the most new features relative to the sixth edition. There are extensive new sections on three-dimensional flows, three-dimensional design features, and three-dimensional computational methods. The sec-tion on through-flow methods has also been reworked and ...

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  • Numerical modelling and optimization of vertical axis

    2021-6-1 · The two-dimensional simulations showed that for a turbine spacing of 1.2D, the power coefficient was 15% higher for both turbines. Additionally, the three-dimensional simulations found an increase of at least 8%. Finally, Brownstein et al. conducted experiments of a pair of 5-bladed VAWTs in an open circuit, subsonic wind tunnel.

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  • Dimensional stability of short fibre reinforced flowable ...

    2021-2-25 · The flowable dental composite system consisted of 80 wt% UDMA-20 wt% TEGDMA (Esstech, Inc., USA) based resin reinforced with 0.7 µm strontium glass …

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  • Research | Kenny Gruchalla, Ph.D.

    2021-4-23 · 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 …

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  • Home Page: Oral Surgery, Oral Medicine, Oral

    About OOOO. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology is required for all clinicians involved in the diagnosis and treatment of oral and maxillofacial disease. It is the only major dental journal that provides comprehensive and complementary information regarding the diagnosis and treatment of oral and maxillofacial conditions ...

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  • Wind turbine performance assessment using multi

    2012-9-1 · Three methods were developed, and they were evaluated using SCADA (supervisory control and data acquisition) data only that have been collected from a large-scale on-shore wind turbine for 27 months. Empirical observations from the results of the three methods indicate the ability of the approach to trend and assess turbine degradation prior to ...

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  • Trending Developments in Wind Turbine Technology

    2021-3-18 · Wind power is an essential source of electricity and accounts for about 8% of domestic energy in the US [1]. Modern wind turbines typically last for 20-25 years of operation. Depending on environmental conditions, the size of the turbine, and the wind speeds, a turbine can produce up to 6 million kWh in a year [2].

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  • Review of supercritical CO2 technologies and systems

    2021-2-25 · Supercritical CO 2 is a topic that recently gained interest and appeal within many scientific conferences. Besides the tracks allocated within turbomachinery and waste-heat recovery conferences, the most established events are the International sCO 2 Power Cycles Symposium taking place in the US and the European sCO 2 conference for energy systems organised by the European sCO 2 alliance , .

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  • Mitsubishi Power, Ltd. | M701G Series

    2 天前 · 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 ...

    Get Price
  • Cone beam CT in dental practice | British Dental Journal

    2009-7-11 · Cone Beam Computed Tomography (CBCT) is a relatively new technology to dentistry, used for the three-dimensional imaging of the teeth and jaws …

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  • A Three-Dimensional Complex Measurement Model

    2020-10-19 · As can be seen from the above figure, with the power supply aging, the health curve of the three-dimensional space gradually changes from the initial green area to the yellow area and then to the blue area, which represents the gradual evolution of the health of the power source to subhealth and then to the dangerous state. 5. Conclusion

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  • Three-dimensional building-cube method for inviscid ...

    2015-12-8 · In this study, the Building-Cube method (BCM) devised for calculating large-scale flows and getting rid of the grid dependencies of computational results is extended to perform 3D inviscid compressible fluid flow simulations. The proposed scheme divides a computational domain into a large number of cubes with different sizes, and each individual cube is a sub-flow field simulated with a ...

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  • Efficient Optimization Design Method Using Kriging

    2012-5-22 · Efficient Optimization Design Method Using Kriging Model. Shinkyu Jeong , Mitsuhiro Murayama and. Kazuomi Yamamoto. Shinkyu Jeong. Japan Aerospace Exploration Agency, Tokyo 182-8522, Japan. Search for more papers by this author. , Mitsuhiro Murayama.

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  • Advanced Design of Turbomachinery — MIT Gas

    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 ...

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  • Analysis of a Quasi-Two-Dimensional Flamelet Model

    2021-5-28 · Three-feed combustion systems in which fuel gas, oxygen, and diluent ( \hbox {CO}_{2} CO 2 ) are issued into a combustor are key components to realize an oxy-fuel type gas turbine in a zero-emission plant. Yet, simulations of such systems using mixture fraction-based models are difficult, since multiple mixture fractions are required to describe the system. In this study, large-eddy ...

    Get Price
  • Numerical Simulation of a Tidal Turbine Based

    Shi, W, Atlar, M, Seo, K, Norman, R, & Rosli, R. 'Numerical Simulation of a Tidal Turbine Based Hydrofoil With Leading-Edge Tubercles.' Proceedings of the ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. Volume 6: Ocean Space Utilization; Ocean Renewable Energy. Busan, South Korea. June 19–24, 2016. V006T09A005.

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  • Turbine - Turbine selection on the basis of specific

    2019-9-24 · A hybrid energy storage system using pump compressed air and micro-hydro turbine. Renew Energy, 2014, 65: 117–122. Google Scholar 15. Zhang Y, Zheng X, Li J, et al. Experimental study on the vibrational performance and its physical origins of a prototype reversible pump turbine in the pumped hydro energy storage power station.

    Get Price
  • Steam Turbines for Power Generation | GE Steam Power

    2021-6-28 · 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
  • Wind Turbine Model - File Exchange - MATLAB Central

    2020-1-27 · It is not surprising that converging the second-order statistics of two- or three-dimensional flowfields requires storage of large data. In terms of SPOD, memory quickly becomes the bottleneck of a naive implementation of the algorithm outlined in Fig. 1. In particular, the Fourier transforms of each block have to be stored in memory to form ...

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  • Guide to Spectral Proper Orthogonal Decomposition |

    3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file. The creation of a 3D printed object is achieved using additive processes. In an additive process an object is created by laying down successive layers of material until the object is created. Each of these layers can be seen as a ...

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  • What is 3D printing? How does a 3D printer work?

    GE5 Gas Turbines The new GE5 is a compact, state-of-the-art, 6 MW class industrial gas turbine. The unit was developed in two configurations: a cold-end drive single shaft for power generation and a hot- end drive twin shaft for mechanical drive applications. Maximum commonality has been maintained between the single and twin shaft models.

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  • Business information|HI!IHI|IHI Corporation

    The large, 300+ foot (100m) and taller wind turbines have an impact on views, wildlife, aviation, telecommunication, roads, and more that can prevent them from being installed on many otherwise profitable properties. These wasted locations alone are a 100 Billion market needing a much shorter turbine.

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  • GE GAS TURBINE MANUAL Pdf Download | ManualsLib

    There is provided a conveyor chain for use in a three-dimensional conveyor line, in which a plurality of chain links each with a top plate provided on a link body thereof are connected endlessly to each other by shaft pins for three-dimensional conveyance of products, a projecting head portion of a rearward one of two adjacent chain links is disposed between a pair of leg portions of a ...

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