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  • Three-Dimensional Solid Modeling of Large

    The result obtained from the program was transmitted directly into Pro/E, and the 3D modeling of large wind turbine blades was achieved. This method accomplishes the programming design and the parameterized modeling, thus enhances the efficiency of the design and precision of modeling.

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  • Three-dimensional simulation of unsteady flows

    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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  • r SANDIA REPORT - ResearchGate

    The basic input to any method of three-dimensional turbulence simulation is the wind speed PSD, Many models of turbulence PSDS have been proposed, starting with von Karman in 1948 [9].

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  • Evaluation of the 3D Printing Accuracy of a Dental

    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 …

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  • Exjobb-MMK2007 23 MPK584 - DiVA portal

    2012-8-16 · rotational and can not exist in two dimensional flows. • Dissipation – kinetic energy of turbulence is consumed by viscous shear stress deformation work. Thus, to sustain turbulence, a continuous supply of energy is needed, otherwise the turbulence perish. • Continuum – turbulence can only occur in three dimensional space …

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  • Dynamic instability of a pump-turbine in load

    2018-3-21 · 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 the user-defined functions in the FLUENT software. The rotational speed predicted through numerical simulation agrees well with …

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  • Performance studies on cavitation-resistance

    2021-6-1 · When the turbine is working, the transient motion equation of the turbine is as follows: (1) T d − (T f + T s + T i + T o) = J d ω d t Where, T d is the rotating driving torque caused by water flow acting on the turbine blade, T f is the friction torque of the bearing, T s is the viscous resistance torque on the outer surface of the turbine, T i is the viscous resistance torque on the inner surface of the hub, T o is other resistance torque, J is the moment of inertia of the turbine…

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

    2015-10-6 · Foil gas bearings using CO 2 are the most promising for small S-CO 2 turbomachinery but there are many problems to address: large power loss due to high flow turbulence, lack of design/analysis tool due to nonideal gas behavior, and lack of load capacity when they are used for large systems. This paper presents high-level design/analysis tool involving three-dimensional …

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  • Application of a Speed Exclusion Zone

    2016-10-18 · A exclusion zone width of ±5% is shown to increase tower vibrations in some cases. The speed exclusion zone algorithm will lead to a reduction in power output for a ±10% and ±15% speed exclusion zone. For the ±5% speed exclusion zone no significant change in power output is observed.

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  • Yongguang CHENG | Research Director | PhD |

    Three-dimensional (3D) computational fluid dynamics (CFD) was used to simulate the load rejection transients with guide-vane closing to predict the RLU possibility of the fixed-blade Kaplan turbine...

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  • A Numerical Simulation of the Inviscid Flow Through

    2020-8-6 · Three-dimensional, 1nv1sc1d codes have been developed for Isolated propel-lers using a variety of algorithms. Bober, et al. (ref. 2) and Barton, et al. (ref. 3) used the Beam and Warming algorithm and obtained good comparisons to experimental results. Clark (ref. 4) used Denton's finite volume code modified

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  • Determination of three-dimensional movement for

    2015-2-1 · Three dimensional DIC uses two cameras to calculate the in-plane and out-of-plane displacement components based on the principles of photogrammetry , and it has been applied in various fields , , . To measure the 3D motion of dynamic rotary objects, high-speed imaging systems and the optical non-contact DIC …

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

    2020-8-6 · Rapid Calculations of Three-Dimensional Inlet Fan Interaction By Rodrick V. Chima Presented at the NASA Fundamental Aeronautics 2007 Annual Meeting Oct. 30 – Nov. 1, 2007 New Orleans, LA Abstract Two computational fluid dynamics codes have been merged to permit rapid calculations of inlet fan …

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  • Analysis of transient flow in a pump-turbine during

    2018-5-15 · The transient flow in pump-turbines during the load rejection process is very complex. 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 …

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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 …

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  • Hydraulic interaction of two parallel pump

    The one-dimensional rigid column theory includes three basic equations that describe the water hammer pressure, surge tank pressure, and rotational speed variation of a pump-turbine, as shown in Eqs. (2) , (3) , (4) .

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  • Application of a Speed Exclusion Zone Algorithm

    Smilden, E, & Sørensen, AJ. 'Application of a Speed Exclusion Zone Algorithm on a Large 10MW Offshore Wind Turbine.' 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 …

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  • Yongguang CHENG | Research Director | PhD |

    Three-dimensional (3D) computational fluid dynamics (CFD) was used to simulate the load rejection transients with guide-vane closing to predict the RLU possibility of the fixed-blade Kaplan turbine...

    Get Price
  • Evaluation of the 3D Printing Accuracy of a Dental

    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 …

    Get Price
  • Determination of three-dimensional movement for

    2015-2-1 · Three dimensional DIC uses two cameras to calculate the in-plane and out-of-plane displacement components based on the principles of photogrammetry , and it has been applied in various fields , , . To measure the 3D motion of dynamic rotary objects, high-speed imaging systems and the optical non-contact DIC …

    Get Price
  • Steam Turbines for Power Generation | GE Steam

    2021-7-9 · 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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  • 3D printing in dentistry | British Dental Journal

    2015-12-11 · 3D printing has been hailed as a disruptive technology which will change manufacturing. Used in aerospace, defence, art and design, 3D printing is becoming a subject of great interest in surgery.

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  • Analysis of transient flow in a pump-turbine during

    2018-5-15 · The transient flow in pump-turbines during the load rejection process is very complex. 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 …

    Get Price
  • 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 …

    Get Price
  • Wind Turbine Model - File Exchange - MATLAB

    2019-9-24 · Li Z, Bi H, Wang Z, et al. Three-dimensional simulation of unsteady flows in a pump-turbine during start-up transient up to speed no-load condition in generating mode. Proc Inst Mech Eng Part A-J Power Energy, 2016, 230: 570–585. Google Scholar 31

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  • Investigation on reversible pump turbine flow

    Three-dimensional (3D) computational fluid dynamics (CFD) was used to simulate the load rejection transients with guide-vane closing to predict the RLU possibility of the fixed-blade Kaplan turbine...

    Get Price
  • Steam Turbines for Power Generation | GE Steam

    2021-7-9 · 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
  • Evaluation of the 3D Printing Accuracy of a Dental

    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 …

    Get Price
  • 3D printing in dentistry | British Dental Journal

    2015-12-11 · 3D printing has been hailed as a disruptive technology which will change manufacturing. Used in aerospace, defence, art and design, 3D printing is becoming a subject of great interest in surgery.

    Get Price
  • Understanding Journal Bearings - EDGE

    Understanding Journal Bearings Malcolm E. Leader, P.E. Applied Machinery Dynamics Co. Durango, Colorado ABSTRACT This paper covers the basic aspects of journal bearings including lubrication, design and application.

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  • Mitsubishi Power, Ltd. | M701G Series

    2021-7-11 · 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 …

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  • Wind Turbine Model - File Exchange - MATLAB

    2016-6-30 · The measured data points of the turbine characteristics are first expressed as a grid -spline space-curved surface, as shown in Figure 2(a).The space-curved surface is composed of three independent three-dimensional surfaces, as shown in Figure 2(b), or projections on a two-dimensional plane, as shown in …

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  • Transient Simulations in Hydropower Stations

    2019-9-24 · Li Z, Bi H, Wang Z, et al. Three-dimensional simulation of unsteady flows in a pump-turbine during start-up transient up to speed no-load condition in generating mode. Proc Inst Mech Eng Part A-J Power Energy, 2016, 230: 570–585. Google Scholar 31

    Get Price
  • Investigation on reversible pump turbine flow

    “Three-dimensional multiprocessor system-on-chip thermal optimization.” In Proceedings of the 5 th IEEE/ACM international conference on Hardware/software codesign and system synthesis, (CODES-ISSS …

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  • Innovative Power Generation Systems

    Instrumentation for three-dimensional imaging of fuel sprays. A high-efficiency burner and appliances for military field kitchens. Compact fuel reformer systems for converting jet fuel to syngas in small devices. Custom CFD-based software tools for predicting combustion stability. Compact gas turbine combustors for inter-turbine …

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  • Cone beam CT in dental practice | British Dental

    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 ( Fig. 1 ). CBCT is a result of dramatic advances in ...

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  • Anumericalinvestigationintotheeffectofenginebleed ...

    2018-12-6 · bine efficiency. Representative turbine maps for the AMT Olympus turbojet engine from reference [10]are shown in Fig. 3. The speed line corresponding to low-est non-dimensional turbine speed (N. ∗ t = N √. T. 4) is highlighted. Using the state vector. X = (P. 3, P. 5, N) and two-dimensional interpolation, the non-dimensional tur-bine …

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  • Wind Energy Experiments & Turbine Science

    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 …

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  • Mechanical and Aerospace Engineering -

    An experimental investigation of low-dimensional techniques for large scale noise source characterization in a heated jet, Andre M. Hall. Link. Fully three-dimensional and viscous semi-inverse method for axial/radial turbomachine blade design, Min Ji. Link. Application of frequency-domain-method to rotorcraft aerodynamics, Manish …

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  • IJTPP | Free Full-Text | Pulsed Flow Turbine

    2021-7-8 · 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 …

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  • The Space Review: Engineering Mars commercial

    2021-7-9 · where PBF-L is located within this three-dimensional cube. Clearly, much space remains in the cube – space that can potentially be occupied by other technologies, as we discuss below. A Compared to conventional manufacturing, PBF-L is still very expensive. A significant gap exists with regard to costs, especially in …

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  • Advancements in metal 3D printing - Roland Berger

    2015-2-18 · Chan, JKK, Yaras, MI, & Sjolander, SA. 'Interaction Between Inlet Boundary Layer, Tip-Leakage and Secondary Flows in a Low-Speed Turbine Cascade.' Proceedings of the ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. Volume 1: Turbomachinery. The Hague, Netherlands. …

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