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  • Three-dimensional flow simulation of transient

    2013-5-23 · The transient power failure process of a prototype pump-turbine was studied numerically by three-dimensional (3-D) simulations. Fluid coupling and dynamic mesh (DM) method were used to calculate the rotational speed of the runner. Simulations were performed based on turbulence model.

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  • Dental Portable Turbine Unit With Air Compressor

    Dental Portable Turbine Unit With Air Compressor Suction System 3 Way Syringe 4h , Find Complete Details about Dental Portable Turbine Unit With Air Compressor Suction System 3 Way Syringe 4h,Dental Portable Turbine Unit,Dental Portable Unit,Dental Equipment from Other Dental Equipments Supplier or Manufacturer-Zhengzhou Huaer Electro-Optics Technology Co., Ltd.

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  • Optimum Design of the Dental Air-Turbine

    2020-1-22 · An air-turbine and associated air supply tube was optimized as a dental air-turbine handpiece system. The system consists of an air-turbine with an impeller and a housing, and an air supply tube which supplies compressed-air to the air-turbine. The flow characteristics of the dental air-turbine handpiece system were investigated using ANSYS CFX.

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  • A testing machine for dental air-turbine handpiece ...

    The measurement of performance characteristics of dental air turbine handpieces is of interest with respect to product comparisons, standards specifications and monitoring of bearing longevity in clinical service. Previously, however, bulky and expensive laboratory equipment was required. A portable …

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  • 700-m 400-MW Class Ultrahigh-head Pump Turbine

    2015-3-31 · The ultrahigh-head pump turbine has been designed utilizing the latest technology such as computational fluid dynamics (CFD) and three-dimensional computer-aided design and associated structure analysis (3D-CAD/CAE) to ensure that it has high strength reliability and high hydraulic performance. Furthermore, several tests were conducted with actual

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  • FUNDAMENTALS OF FLUID MECHANICS Chapter 12

    2014-5-22 · Example 12.2 Centrifugal Pump Performance Based on Inlet/Outlet Velocities zWater is pumped at the rate of 1400 gpm through a centrifugal pump operating at a speed of 1750 rpm. The impeller has a uniform blade length, b, of 2 in. with r 1 = 1.9 in. and r 2 = 7.0 in., and the exit blade angle is β=23º . Assume ideal flow conditions and that the

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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 …

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  • Grant Ingram - ARMA

    2017-3-27 · 4.10 The Four Major Types of Hydraulic Turbine 4.11 Pelton’s Patent Application and Analysis Model 4.12 Three Dimensional Views of a Francis Turbine 4.13 Three Dimensional Views of a Kaplan Turbine 5.1 Meridional View of a Gas Turbine 5.2 Meridional Views of Radial and Centrifugal Machines 5.3 A Generic Turbomachinery Flow Passage

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  • Aerodynamic optimization of the configuration of a

    2021-6-15 · Three-dimensional vortical structures in the wake behind a wind turbine play an important role on the performance of a wind turbine, and consequently on the design of a wind farm . These structures are missed in two-dimensional CFD simulations. Therefore, in order to obtain accurate results, three-dimensional CFD simulations are necessary.

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  • Turbo-Compressors - an overview | ScienceDirect

    The function of the regenerator is to use gas generator exhaust vapors to preheat the air exiting the air compressor, thus reducing the amount of fuel required by the gas turbine. Figure 6.1.5 also shows the changes of gas temperature, pressure, energy, and the horsepower produced in the different sections of the gas turbine. Note that the power produced in a gas turbine is typically three times the output power.

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  • Comparison of cutting efficiencies between electric and ...

    2018-3-19 · Three dimensional finite element stress analysis of a cantilevered fixed partial enture. ... reason to use an electric handpiece over an air-turbine hand-piece, as the electric handpiece is significantly more efficient at ... between electric and air-turbine dental handpieces Charlson Choi, DDS, MS,a Carl F. Driscoll, DMD,b and Elaine

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  • FUNDAMENTALS OF FLUID MECHANICS Chapter 12

    2014-5-22 · Example 12.2 Centrifugal Pump Performance Based on Inlet/Outlet Velocities zWater is pumped at the rate of 1400 gpm through a centrifugal pump operating at a speed of 1750 rpm. The impeller has a uniform blade length, b, of 2 in. with r 1 = 1.9 in. and r 2 = 7.0 in., and the exit blade angle is β=23º . Assume ideal flow conditions and that the

    Get Price
  • Dental Equiptment Portable Dental Turbine Unit

    Dental Equiptment Portable Dental Turbine Unit With Built-in Air Compressor & 3 Way Syringe 110v , Find Complete Details about Dental Equiptment Portable Dental Turbine Unit With Built-in Air Compressor & 3 Way Syringe 110v,Portable Dental Turbine,Dental Turbine Unit,Dental Unit from Other Dental Equipments Supplier or Manufacturer-Foshan Yashite Medical Instrument Co., Ltd.

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  • Flow visualization and the three-dimensional flow in

    2012-5-23 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

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  • Vertical Turbine Pumps - Goulds Pumps

    2013-9-18 · 2 Goulds Vertical Turbine Pumps Flexibility by Design: Three Pump Models, One Common Bowl Assembly The three different pump models in the vertical turbine line have one thing in common – the hydraulic design of the pump bowl assembly. Using state-of-the-art techniques in turbine pump design, Goulds vertical turbine line covers a

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  • 700-m 400-MW Class Ultrahigh-head Pump Turbine

    2015-3-31 · The ultrahigh-head pump turbine has been designed utilizing the latest technology such as computational fluid dynamics (CFD) and three-dimensional computer-aided design and associated structure analysis (3D-CAD/CAE) to ensure that it has high strength reliability and high hydraulic performance. Furthermore, several tests were conducted with actual

    Get Price
  • Study on an innovative three-dimensional wind

    2018-9-15 · An original analytical three-dimensional wind turbine wake model is presented. The expression of wake model is simple and its computational cost is low. The accuracy of wake model is validated by the wind tunnel measured data. The wake model has a good accuracy beyond the 5D downwind of distance.

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  • A Numerical Study on Performance of Dental Air

    2017-9-1 · Usually, high speed air-turbine dental handpieces operate at 200,000 to 400,000 revolutions per minute [5]. The main part of the dental air turbine is its high speed rotor head consisting of a casing with air inlet and outlet nozzles, impeller, spindle, chuck …

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  • Transient Pressure Analysis of a Prototype Pump

    2018-3-16 · The transient behaviors of a prototype pump turbine are very important to the safe operation of a pumped-storage power plant. This is because the water hammer pressure during transient events affects the pressure surges in the spiral case (SC) and the draft tube (DT).

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  • Takumi Sato - Three-dimensional measurement of

    In order to construct the skill acquisition method for a common treatment of dental caries, it is necessary to prepare quantitative guidelines for Dental students.

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  • In this study, measurement and analysis for the movements of fingers and turbine have been conducted during tooth removal and restoration process using three-dimensional motion capture.

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  • A THREE-DIMENSIONAL TURBINE ENGINE ANALYSIS

    2011-10-11 · A THREE-DIMENSIONAL TURBINE ENGINE ANALYSIS COMPRESSOR CODE (TEACC) FOR STEADY-STATE INLET DISTORTION* Alan Hale Sverdrup Technology, Inc., AEDC Group Arnold Engineering Development Center Arnold Air Force Base, TN 37389-6001 Walter O'Brien Mechanical Engineering Department Head Virginia Polytechnic Institute and State University

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  • Turbomachinery Blade Design Using 3-D Inverse

    2014-7-30 · Then, a mixed-flow pump impeller (Ns1350), with a specific speed of 1350 (m3/min,m,min −1) or 0.523 (non-dimensional), was optimized to improve the impeller efficiency with constraints for suction performance by Simulated Annealing. Reasonably high efficiency and high suction performance were confirmed by comparing the CFD results with those ...

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  • Flow visualization and the three-dimensional flow in

    2012-5-23 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

    Get Price
  • An ITT Brand Vertical Turbine Pumps

    2019-7-23 · turbine pump can be multi-staged allows maximum flexibility both in the initial pump selection and in the event that future system modifications require a change in the pump rating. A variety of material options allows the selection of a pump best suited for even the most severe services. The many bowl assembly options available ensure that the

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  • Study on an innovative three-dimensional wind

    An original analytical three-dimensional wind turbine wake model is presented. The expression of wake model is simple and its computational cost is low. The accuracy of wake model is validated by the wind tunnel measured data. The wake model has a good accuracy beyond the 5D downwind of distance. The predictions from the wake model are practical.

    Get Price
  • Grant Ingram - ARMA

    2017-3-27 · 4.10 The Four Major Types of Hydraulic Turbine 4.11 Pelton’s Patent Application and Analysis Model 4.12 Three Dimensional Views of a Francis Turbine 4.13 Three Dimensional Views of a Kaplan Turbine 5.1 Meridional View of a Gas Turbine 5.2 Meridional Views of Radial and Centrifugal Machines 5.3 A Generic Turbomachinery Flow Passage

    Get Price
  • A Numerical Study on Performance of Dental Air

    2017-9-1 · Usually, high speed air-turbine dental handpieces operate at 200,000 to 400,000 revolutions per minute [5]. The main part of the dental air turbine is its high speed rotor head consisting of a casing with air inlet and outlet nozzles, impeller, spindle, chuck …

    Get Price
  • 12.3 The Euler Turbine Equation - MIT

    2008-9-3 · 12. 3 The Euler Turbine Equation The Euler turbine equation relates the power added to or removed from the flow, to characteristics of a rotating blade row. The equation is based on the concepts of conservation of angular momentum and conservation of energy. We will work with the model of the blade row shown in Figure 12.2.

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  • L.A Turbine | Rethinking Turboexpanders

    L.A. Turbine, a design and manufacturing company creating application-specific, highly engineered turboexpanders used in hydrocarbon processing, geothermal power generation, and other power-recovery or refrigeration applications in industrial processes worldwide. Learn more here.

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  • Dynamic® DU895A Portable Dental Turbine Unit

    2021-6-18 · Prev: BD-402 Portable Dental Turbine Unit with Air Compressor +Suction System + Triplex Syringe Next: Dynamic® DU852 Portable Dental Unit Air Compressor + Ultrasonic Scaler + Curing Light. Buy discount china dental equipment online at dentalsalemall.com with the high-quality and fast shipping to …

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  • High Speed Dental Air Turbine With Three Single

    High quality High Speed Dental Air Turbine With Three Single Water Spray , Key Chuck Type from China, China's leading dental lab equipment product, with strict quality control dental handpiece parts factories, producing high quality dental handpiece parts products.

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  • Three-Dimensional Visualization of Flow

    2019-1-21 · Three-Dimensional Visualization of Flow Characteristics Using a Magnetic Resonance Imaging in a Lattice Cooling Channel ... Three-Dimensional Velocity Distribution Measurement of an Air Cooled Flow Passage for Gas Turbine Blades by Using Magnetic Resonance Imaging,” ... Geothermal Heat Pump and Heat Engine Systems: Theory and Practice.

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  • Flow visualization and the three-dimensional flow in

    2012-5-23 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

    Get Price
  • Computational Fluid Dynamics Modeling Three

    2013-12-15 · Air turbines are widely used to convert kinetic energy into power output in power engineering. The unsteady performance of air turbines with partial admission not only influences the aerodynamic performance and thermodynamic efficiency of turbine but also generates strong excitation force on blades to impair the turbine safely operating. Based on three-dimensional viscous …

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  • Multiobjective Optimization Design of a

    2013-10-15 · Multiobjective Optimization Design of a Pump–Turbine Impeller Based on an Inverse Design Using a Combination Optimization Strategy ... Three-Dimensional Automatic Optimization Method for Turbomachinery Blade Design,” ... Air-Water Flow Properties in Hydraulic Jumps with Fully and Partially Developed Inflow Conditions.

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  • NSK Ti-Max Z Dental Turbine Handpieces with Light ...

    2014-9-18 · Measurements were taken with the turbine stationary and while driven at tip speed ratios (TSRs) of 1.25 and 2.5, realistic values for VAWTs in operation. The MRV measurement produced three-dimensional velocity data with a resolution of 1/50 of the turbine diameter in all three directions.

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  • Three-Dimensional Velocity Measurements Around

    2008-9-3 · 12. 3 The Euler Turbine Equation The Euler turbine equation relates the power added to or removed from the flow, to characteristics of a rotating blade row. The equation is based on the concepts of conservation of angular momentum and conservation of energy. We will work with the model of the blade row shown in Figure 12.2.

    Get Price
  • Three dimensional dynamic characteristics of solid ...

    2012-8-16 · Three dimensional dynamic characteristics of solid particles suspended by polluted air flow in a turbine stage.

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  • Experimental and Numerical Study of Three

    2015-2-18 · Air was used as the test fluid, and the internal flows were measured at various locations and under various capacities. Flow calculations were made, for both the isolated impeller case and the complete stage case, using Denton viscous codes LOSS3D and MULTSTAGE14, by which the three-dimensional steady flow through multiple blade rows can be ...

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  • NSK Ti-Max Z Dental Turbine Handpieces with Light ...

    Detailed measurements of the subsonic flow in a large-scale, plane turbine cascade were made to evaluate the three-dimensional nature of the flow field. Tests were conducted at a passage aspect ratio of 1.0 with a collateral inlet boundary layer. Flow visualization was done on airfoil and endwall surfaces.

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  • Three-Dimensional Flow Within a Turbine Cascade

    2009-11-20 · Based on the actual turbine structure, a pump-in configuration with spiral grooves is designed for top thrust air bearing, and a pump-out configuration is for bottom bearing, as shown in Figs.4 (a)-(c). Due to the miniaturized dimension and small weight of thrust plate, the axial load is mainly caused by the pressure difference

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  • A MICRO TURBINE DEVICE WITH ENHANCED MICRO AIR

    2010-2-16 · A coupled boundary element method (BEM) and finite difference method (FDM) are applied to solve conjugate heat transfer problem of a three-dimensional air-cooled turbine blade. A loosely coupled strategy is adopted, in which each set of field equations is solved to …

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  • Coupled BEM and FDM Conjugate Analysis of a Three ...

    2018-6-6 · This study is dedicated to drawing a comparison between two- and three-dimensional approach capabilities for the simulation of two similar rotors placed in three inline (or tandem) arrangements. This arrangement is generally recognized as the worst-case scenario for the downwind rotor considering the vortices and disorders produced by the ...

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  • Comparison between two-dimensional and three

    2021-7-9 · 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. 99.96%. reliability over 400,000 operating hours. 1,900 MW.

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  • Arabelle Nuclear Steam Turbine | GE Steam Power

    Cervicofacial subcutaneous emphysema is a rare complication of dental procedures. Although most cases of emphysema occur incidentally with the use of a high-speed air turbine handpiece, there have been some reports over the past decade of cases caused by dental …

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  • Cervicofacial subcutaneous emphysema associated

    Finally, we have to set the boundary conditions for the turbine, the inlet temperature, and the total inlet pressure. And there is an option to specify the rotational direction of the turbine rotor. On the right side, you will see some essential physical values. In this example, we will design a single-stage turbine made of a rotor and a nozzle.

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