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  • Three-Dimensional Solid Modeling of Large Wind

    This paper discussed the problems of design complexity and modeling difficulty for the large wind turbine blades. According to Wilson theory and BEM theory, Matlab was used to calculate chord length, torsional angle and coordinate transformation. The coordinates were outputted automatically.

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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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  • Analysis of transient flow in a pump-turbine during

    2018-5-15 · However, few studies have been conducted on three-dimensional (3-D) numerical simulation. Hence, we simulated 3-D transient turbulent flow in a pump-turbine during the load rejection process using the calculation method of coupling the flow with the rotor motion of rigid body.

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  • 3D printing in dentistry | British Dental Journal

    2015-12-11 · All this means that dentists and dental technicians are becoming well acquainted with, and adept at working with large volumes of digital data. 3D printing offers another form of 'output' device ...

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  • Ingestion Into the Upstream Wheelspace of an Axial

    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 measurements made …

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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 Unsteady Flow Analysis of a Turbine Stage

    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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  • Three-Dimensional Finite Element Analyses for

    2010-7-8 · Feng, Z, Champliaud, H, & Dao, T. 'Three-Dimensional Finite Element Analyses for Pyramidal Three-Roll Bending Process.' Proceedings of the ASME 2009 International Mechanical Engineering Congress and Exposition. Volume 4: Design and Manufacturing. Lake Buena Vista, Florida, USA. November 13–19, 2009. pp. 9-14. ASME.

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

    2015-8-12 · This paper presents high level design/analysis tool involving three-dimensional thermo-hydrodynamic analyses of radial foil bearings considering real gas effect and flow turbulence inside the film. Simulations are performed for radial foil bearing with 34.9mm in diameter lubricated with CO 2 and N 2 under various ambient conditions up to above 40 bar gauge pressure.

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  • 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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  • An Assessment of the Potential of Tidal Power From

    2011-10-31 · When the turbine fence occupies a large portion of the passage, the potential power of the fence rises significantly, to a value much larger than estimates based on the kinetic energy flux. The increase in power comes from the increased tidal head that a large turbine fence creates and the resulting increase in the turbine drag.

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  • Sizing, optimization, control and energy management

    2021-5-4 · Chouaib et al. size hybrid system based on solar photovoltaic, wind turbine, diesel generator and storage system for feeding rural village in southwest Algeria, the simulation and optimization was obtained using HOMER PRO software, the results show the best hybrid system is 2.5 MW solar photovoltaic, two wind turbine, 1.4 MW diesel generator ...

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  • Optimal selection of air expansion machine in

    2018-5-1 · Three main CAES systems, i.e. D-CAES, A-CAES and I-CAES, are used in energy storage systems, from micro-scale to large-scale. D-CAES is a mature technology which has the lowest cost for the large-scale systems. A-CAES and I-CAES are still at the stage of pre-commercialised.

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  • S-shaped characteristics on the performance curves of

    2016-7-1 · S-shaped characteristics on the performance curves of pump-turbines in turbine mode promote instability problems in associated transient processes, e.g., difficulties in synchronizing with power grid in turbine start-ups, unstable performance in turbine load rejections, etc.

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  • Catalogue working high courses - Training Centre Fall ...

    2015-1-1 · In Yixing power station, strong vibrations of guide vanes were experienced during the pump mode start-up and the turbine mode over-speed and double-unit trip tests, because of the large pressure fluctuations in the vaneless space . It was concluded that the pressure fluctuations in vaneless space could cause stress and vibration of the pump ...

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  • Pressure fluctuations in the vaneless space of High

    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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  • Three Dimensional Design and Optimization of a

    2012-5-3 · 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 of a large design space composed of the tip camber line and spanwise distribution of sweep and chord length.

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  • Optimizing the Tip Section Profiles of a Steam Turbine ...

    2014-2-20 · Proceedings of the ASME 2013 Turbine Blade Tip Symposium. ASME 2013 Turbine Blade ... Though there is not much freedom in shape modification of profiles for tip sections of steam turbines of large output, there is still enough space for optimizing these profiles. ... Three-Dimensional Design Method for Long Blades of Steam Turbines Using Fourth ...

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  • 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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  • 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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  • Smart Manufacturing Process of Carbon-Based Low ...

    2020-7-22 · Three-dimensional arrangement of carbon fibers can also be realized using AM techniques. Lewicki et al. (Ref 81) fabricated three-dimensional carbon fiber/polymer composite using a DIW technique with a high degree of fiber alignment. It was observed that 8 wt.% reinforcement of carbon fiber yields a high resolution in the fabricated part.

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  • China National Knowledge Infrastructure ---

    China National Knowledge Infrastructure --- Download Paper. Science-Engineering (A) Recent Updated Papers. • A study on the cause of weathering for ancient sandstone carvings in Sichuan. • An investigation of the disease of the Hongqingsi Grottoes and an elementary research for the prevention.

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  • Cerebellar granule cell axons support high

    2021-6-24 · By recording from hundreds of cerebellar granule cell axons with three-dimensional two-photon calcium imaging, Lanore et al. show that population activity is high-dimensional and that quiet ...

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  • Interaction Between Inlet Boundary Layer, Tip

    Detailed flow field measurements have been made upstream and downstream of the blade row for two values of inlet boundary layer thickness (δ*/c of about 0.015 and 0.04) together with three values of tip clearance (gap heights of 0.0, 1.5 and 5.5 percent of blade chord). In the downstream plane, the total pressure deficits associated with the ...

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  • Damage mechanism identification in composites via

    2021-6-24 · Damage mechanism identification has scientific and practical ramifications for the structural health monitoring, design, and application of composite systems. Recent advances in machine learning ...

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  • Thermoacoustic Modeling of a Gas Turbine

    2008-11-24 · By using a state-space approach, the time domain solution of the acoustic field is obtained. The nonlinearity limiting the pulsation amplitude growth is provided by a fuel saturation term. Furthermore, Helmholtz dampers applied to the gas turbine combustor are acoustically modeled and included in the TA3 model.

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  • Optimizing the Tip Section Profiles of a Steam Turbine ...

    2014-2-20 · Proceedings of the ASME 2013 Turbine Blade Tip Symposium. ASME 2013 Turbine Blade ... Though there is not much freedom in shape modification of profiles for tip sections of steam turbines of large output, there is still enough space for optimizing these profiles. ... Three-Dimensional Design Method for Long Blades of Steam Turbines Using Fourth ...

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  • Tutorial: Computational Methods for Aeroacoustics

    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-stucture interaction

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  • Turbomachinery Thermal Analysis Using Coupled Two

    2012-5-3 · Contreras, J, Corral, R, & Pastor, G. 'Turbomachinery Thermal Analysis Using Coupled Two- and Three Dimensional Models and Reduced Order Fluid Models.' Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 7: Turbomachinery, Parts A, B, and C. Vancouver, British Columbia, Canada. June 6–10, 2011. pp ...

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  • Wind Energy Experiments & Turbine Science Project |

    Recommended Product Wind Turbine Kit Build a sturdy, free-standing wind turbine with a plastic base and take your experimenting to new levels! You’ll be able to test the power of your blade designs with the digital multimeter, store wind energy for later use with the super capacitor, and experiment with series and parallel circuits using two motors and three LEDs.

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  • Nanotechnology and Emerging Technologies News

    3D-printed perovskite nanopixels for ultrahigh-resolution displays and multilevel anticounterfeiting. The three-dimensional (3D) geometry of 3D-printed nanopixels can increase the emission brightness of display pixels, varying with the height of the pixels, and can be used to fabricate super high-resolution devices. 3D printing of perovskite nanopillars can be used for creating nanoscale ...

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  • Variation of orthodontic treatment decision-making

    2014-8-6 · In some areas of dentistry, there is a need to record and manipulate three-dimensional (3D) replicas of a patient's occlusion before making treatment decisions. 1 Plaster dental models have provided dentists with a diagnosis and treatment planning tool in addition to being a 3D record of a patient's original occlusion. 2 Moreover, in the ...

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

    NASA John F. Kennedy Space Center (KSC) hosted the symposium that was held at the Hilton Oceanfront Hotel in Cocoa Beach, Florida on May 13-15, 1998. The symposium was cosponsored by Lockheed Martin Missiles and Space and the Aerospace Mechanisms Symposium Committee. During these days, 28 papers were presented.

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  • NASA Technical Documents : Free Texts : Free

    2021-7-23 · ONIVA™ Watercolor Tropical Pop-Up Blanket in Black/White. NON-MEMBER PRICE. 34.99. BEYOND+ MEMBER PRICE. 27.99. Ships free orders over 39. Not available at Clybourn Place. PackIt® Freezable 2-Bottle Multicolor Striped Wine Bag. NON-MEMBER PRICE.

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  • Blanket Storage Bags | Bed Bath & Beyond

    2014-12-10 · 图形学领域的关键算法及源码链接. GTS (2D dynamic/constrained Delaunay triangulation, robust geometric predicates, mesh boolean set operations, refinement/coarsening, view-independent continuous LOD, view-dependent LOD, AABB-trees, Kd-trees, graph partitioning, isosurfacing, area, volume, mean/gaussian/principal curvature ...

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  • Mitsubishi Power, Ltd. | M501G Series

    2021-7-23 · High-performance large-capacity gas turbines for 60 Hz power generation. In February 1997, the first unit of the 1,500°C Class M501G gas turbine came into commercial operation. This series features the use of steam for cooling combustors. The GAC Series, which is the current mainstay model, adopts the latest air-cooled combustors in place of ...

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  • Turbomachinery Thermal Analysis Using Coupled Two

    2012-5-3 · Contreras, J, Corral, R, & Pastor, G. 'Turbomachinery Thermal Analysis Using Coupled Two- and Three Dimensional Models and Reduced Order Fluid Models.' Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 7: Turbomachinery, Parts A, B, and C. Vancouver, British Columbia, Canada. June 6–10, 2011. pp ...

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  • Volume 8 Issue 4 | Journal of Medical Imaging

    The Journal of Medical Imaging allows for the peer-reviewed communication and archiving of fundamental and translational research, as well as applications, focused on medical imaging, a field that continues to benefit from technological improvements and yield biomedical advancements in the early detection, diagnostics, and therapy of disease as well as in the understanding of normal conditions.

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  • A Supercritical CO2 Brayton Cycle Power Converter for

    2015-10-27 · Three-dimensional layouts of S-CO 2 Brayton cycle power converter and shutdown heat removal components and piping have been determined and three-dimensional CAD drawings prepared. The S-CO 2 Brayton cycle power converter is found to have a small footprint reducing the space requirements for components and systems inside of both the turbine ...

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  • Effects of the Splitter Blade on the Performance of a

    2018-10-11 · The pumped hydro energy storage is the most effective way to store large-scale electricity and has been widely used in the world. As the key equipment in the pumped hydro energy storage, it is significant and urgent to improve the performance and operation stability of the pump-turbine. In this study, the effect of runners with and without splitter blade on the performances and inner flow ...

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  • Development of Design Method for Supersonic

    2013-7-9 · The purpose of this paper is development of the design method for supersonic turbine aerofoils. In particular, a design method is established for four fundamental parameters which determine the overall configuration of the aerofoils: inlet angle, outlet angle, pitch-to-chord ratio, and stagger angle.

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  • A Hydrostatic Pressure-Driven Desalination System for ...

    2019-7-10 · Today (July 10, 2019): Review of Air France’s B787 Dreamliner Business Class from Paris to the Maldives. I recently flew Business Class in a Boeing 787-9 Dreamliner of Air France from Paris Charles De Gaulle Airport (CDG) to Velana International Airport (MLE) in the Maldives. France’s flagship carrier operates a small subfleet of Dreamliners with a total of nine aircraft.

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