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  • Three-dimensional inviscid analysis of radial turbine

    The three-dimensional inviscid DENTON code is used to analyze flow through a radial-inflow turbine rotor. Experimental data from the rotor are compared with analytical results obtained by using the code. The experimental data available for comparison are the radial distributions of circumferentially averaged values of absolute flow angle and total pressure downstream of the rotor exit.

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  • Three-Dimensional Navier-Stokes Simulations of Turbine ...

    2014-6-16 · In the present study the approximation of two-dimensional-ity is removed, and three-dimensional airfoil geometries are used. In addition , the hub outer casing and rotor-tip clear-anc e ar all include d in th calculation. A system of patche and overlaid grids is used to discretize the rather complex geometry of the three-dimensional configuration.

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  • Three-Dimensional Analysis of Turbine Rotor Flow

    2015-2-25 · A 3D Navier-Stokes investigation of a high pressure turbine rotor blade including tip clearance effects is presented. The 3D Navier-Stokes code developed at ONERA solves the three-dimensional unsteady set of mass-averaged Navier-Stokes equations by the finite volume technique.

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  • A three-dimensional numerical study of the Magnus wind ...

    0.32m. Therefore, the cylinder rotation rate at outer end of such blade can be increased, which works on the same principle as the turbine blade designed by Scarpa.4 Blades 5 and 6 are two

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  • The Three Dimensional Flow Field at the Exit of an

    The Three Dimensional Flow Field at the Exit of an Axial-Flow Turbine Rotor A systematic and comprehensive investigation was performed to provide detailed data on the three dimensional viscous flow phenomena downstream of a modem turbine rotor and to understand the flow physics such as origin, nature, development of wakes, secondary flow, and leakage flow.

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  • Three dimensional flow at the junction between a

    Abstract. A visualization of the flow on the suction side and end-wall of a passage between two neighboring turbine blades is compared with mass (heat) transfer measurements on the same surfaces. Besides the horseshoe and passage vortices, there are several smaller vortices formed near the junction of blade and end-wall whose origins are discussed.

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  • The Three Dimensional Flow Field at the Exit of an Axial ...

    2020-8-6 · three dimensional viscous flow phenomena downstream of a modem turbine rotor and to understand the flow physics such as origin, nature, development of wakes, secondary flow, and leakage flow. The experiment was carried out in the Axial Flow Turbine Research Facility (AFrRF) at Penn State, with velocity measurements taken with a 3-D LDV System.

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  • Unsteady Three-Dimensional Navier-Stokes Simulations

    2003-10-20 · removed and fully three-dimensional airfoils geometries are used. In addition, the hub, outer casing, and rotor tip clearance are all included in the calculations. As in Rai(1987a), a system of patched and overlaid grids is used to discretize the rather complex geometry of the three-dimensional configuration. An implicit, upwind third

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  • Modelling Built-up Steam Turbine Rotor Using Finite ...

    2017-3-14 · A single stage of a built-up turbine rotor consisting of a turbine disc shrink fitted onto a cylindrical shaft will be modelled using the finite difference method. Three sources of rotor stress will be considered in this model: 1. Body forces due to the inertia of the disc and attached turbine blades, 2.

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  • Detailed Measurements of Three-Dimensional Flows and ...

    The tests were made at three rotor speeds of 330, 522 and 760 rpm with keeping the turbine mass flow rate constant. Fig.3 shows velocity triangles obtained at the midspan of the rotor inlet at the three rotor speeds. The dash lines indicate the blade inlet (geometrical) angle, the thin solid lines indicate the

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  • Three dimensional flow at the junction between a

    A visualization of the flow on the suction side and end-wall of a passage between two neighboring turbine blades is compared with mass (heat) transfer measurements on the same surfaces. Besides the horseshoe and passage vortices, there are several smaller vortices formed near the junction of blade and end-wall whose origins are discussed. The vortices detach from the end-wall and move up the ...

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  • Hybrid RANS/LES simulations of the three-dimensional

    three-dimensional flow at root region of a 10 ... Hybrid RANS/LES simulations on a 10 MW wind turbine rotor ... shall be noted that the shape of the domain is 1/3 of cylinder (Figure 1). The grid

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  • Numerical Modelling of a Radial Inflow Turbine with and ...

    2017-2-2 · In this thesis a three-dimensional approach to the design of a radial turbine is implemented, and two configurations, with and without fixed nozzle ring, are generated. The turbine is designed for a turbocharging system of a typical six-cylinder diesel truck engine, of which exhaust gas thermodynamic properties are known.

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  • Wind Tunnel Study on Wake Instability of Twin H-Rotor ...

    2020-8-20 · Compared with the horizontal axis turbine, the vertical axis turbine can absorb energy in any direction of flow without complicated yaw system. The vertical axis turbine has a broad prospect in o shore wind power generation. The swept surface of a rotating vertical-axis H-rotor turbine (or horizontal axis turbine) blades is a cylinder (or disk).

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  • Experiments on Fairing Design for a Wind Turbine Tower

    2015-2-14 · Zahle et al.7 conducted a three-dimensional Navier-Stokes simulation to model the interaction between a wind turbine tower and a downwind rotor blade. They noted that when the blades ... Mashud et al.12 attached circular rings around the cylinder, and Sosa et al.13 used three-electrode plasma actuators. All three of these techniques resulted in ...

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  • Analysis of Wind Turbine Pressure Distribution and 3D ...

    2016-2-5 · surface. Detailed flow measurements on wind turbine blade were performed in a wind tunnel. The test wind turbine has a three-bladed rotor with a radius of 1.2m. Each blade is twisted and tapered as same as commercial wind turbine blade. The maximum power coefficient of the test wind turbine is 0.43 at the tip speed ratio of 5.2.

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  • Vibration Analysis of Turbine Rotor System

    Turbine impeller 11 64 16 22.2 Compressor impeller 10 66 13 17.7 Shaft 173 . Fig. 1. The model of turbine rotor system . Because the structure of body structure of turbine rotor system was very complex, we should simplify the structure first. This paper …

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  • Deformation and Vibration-Induced Stress Intensity of

    2018-1-29 · The rotor of a mean-pressure cylinder (RSD-1) of a T-250/300-240 UTZ extraction turbine was examined. The rotor model (length = 4.42 m, shaft diameter = 0.426 m), constructed with the three-dimensional FE, is presented in Fig. 1. The virtual transverse crack was set on the rotor shaft between the 17th and 18th stages (numbering of shafting ...

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

    2020-6-5 · Two-dimensional numerical simulations of vortex-induced vibrations for wind turbine towers Axelle Viré 1, Adriaan Derksen 1, 2, Mikko Folkersma 1, and Kumayl Sarwar 2 1 Wind Energy Section, Faculty of Aerospace Engineering, Delft University of Technology, The Netherlands 2 Siemens Gamesa Renewable Energy, Den Haag, The Netherlands Correspondence: Axelle Viré ([email protected])

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  • Three-Dimensional Design and Optimization of a

    2013-3-25 · Attenuation of Vane Distortion in a Transonic Turbine using Optimization Strategies, Part I – Methodology, Part II – Optimization,” ASME Paper Nos. GT2010-22370 and GT2010-22371. 22. Arnone, A., 1994, “ Viscous Analysis of Three-Dimensional Rotor Flow Using a Multigrid Method,”

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  • Three-Dimensional Multi-Objective Design

    2012-5-23 · Three-Dimensional Design and Optimization of a Transonic Rotor in Axial Flow Compressors 25 March 2013 | Journal of Turbomachinery, Vol. 135, No. 3 Uncertainty-based robust aerodynamic optimization of rotor blades

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  • Unsteady and three-dimensional aerodynamic effects

    2020-1-5 · Unsteady and three-dimensional aerodynamic effects on wind turbine rotor loads. The paper investigates the use of vortex methods in the computation of important flows for wind turbine aerodynamics. These flows are characterised by inflow velocity unsteadiness, spatial variations and non-zero spanwise component.

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  • Turbine Gas - Doosan Heavy Industries & Construction

    2017-4-3 · The first and second stage vanes on the turbine rotor are free-standing. The third and fourth stages have integral shrouds. The compressor blade path is designed using a three-dimensional flow-field analysis computer program. Rotor blades are double circular arc designs in the first four stages. Stationary blading, fabricated into two 180

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  • Computational Modeling of Three-Dimensional

    2015-2-18 · Ho, Y, & Lakshminarayana, B. 'Computational Modeling of Three-Dimensional Endwall Flow Through a Turbine Rotor Cascade With Strong Secondary Flows.' Proceedings of the ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. Volume 1: Turbomachinery. The Hague, Netherlands. June 13–16, 1994. V001T01A046. ASME.

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  • Three-dimensional wind turbine positioning using

    2018-1-1 · At a point with distance x away from the turbine rotor along the streamwise direction, the radius of the wake affected area is denoted as r w, calculated by (2) r w = α x + r r, where r r is the rotor radius of the turbine, and the entrainment constant α is calculated according to the hub height of the turbine and the roughness length through ...

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  • Vibration Analysis of Turbine Rotor System

    Turbine impeller 11 64 16 22.2 Compressor impeller 10 66 13 17.7 Shaft 173 . Fig. 1. The model of turbine rotor system . Because the structure of body structure of turbine rotor system was very complex, we should simplify the structure first. This paper …

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  • Computational Modeling of Three-Dimensional

    1996-4-1 · A steady, three-dimensional Navier–Stokes solver that utilizes a pressure-based technique for incompressible flows is used to simulate the three-dimensional flow field in a turbine cascade. A new feature of the numerical scheme is the implementation of a second-order plus fourth-order artificial dissipation formulation, which provides a ...

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  • Effect of rotor aspect ratio and solidity on a straight ...

    2020-3-20 · the rotor aspect ratio, rather than the ratio of the diameter and blade span length. Compared with the H/D = 1.2, the circulation amount ratio of H/D = 0.9 indicates a large negative value in the blade center position. Keywords: Straight-bladed vertical axis wind turbine, Rotor aspect ratio, Solidity, Three-dimensional analysis, Panel method.

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  • Reducing rotor secondary losses in a turbine stage

    The rotor blade of an experiment turbine for low Reynolds number flow conditions is recontoured on the hub endwall to reduce the hub’s secondary flow losses. The baseline rotor blade is radially stacked with airfoils of free vortex twisting. The hub section airfoil of the rotor blade is reprofiled for three considerations. The first is to reduce the inlet metal angle to fit with the vane’s ...

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  • Three-dimensional Navier-Stokes simulations of

    2012-5-23 · Three-dimensional Navier-Stokes simulations of turbine rotor-stator interaction. Part I - Methodology. Man Mohan Rai; ... Quasi-three-dimensional calculation for the effect of axial gap variation on the performance of an advanced compressor stage. Gerald Micklow and ...

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  • Fleet360* Total Plant Service Solutions Steam Turbine ...

    2020-8-25 · The routine use of three-dimensional (3D) blading has allowed many traditional efficiency limitations to be overcome. With 3D ... turbine are reduced through the enhanced shaping of blade ... The new rotor had three more stages in the HP section to help provide the additional power required. The retrofit cylinder

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  • Three-Dimensional Structural Evaluation of a Gas

    2014-9-18 · 'Three-Dimensional Structural Evaluation of a Gas Turbine Engine Rotor.' Proceedings of the ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. Volume 7A: Structures and Dynamics. Düsseldorf, Germany. June 16–20, 2014. V07AT31A025. ASME.

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  • Unsteady three-dimensional Navier-Stokes

    2012-8-17 · Unsteady three-dimensional Navier-Stokes simulations of turbine rotor-stator interaction. MAN RAI; MAN RAI. NASA, Ames Research Center, Moffett Field, CA. ... Studies on Unsteady Laminar-Turbulent Transition Caused by Wakes in Turbine Rotor-Stator Interaction Based on a Hybrid-LES Model.

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  • Aerodynamic wind-turbine rotor design using

    In this paper a surrogate optimization methodology using a three-dimensional viscous-inviscid interaction code for the aerodynamic design of wind-turbine rotors is presented. The framework presents a unique approach because it does not require the commonly-used blade element momentum (BEM) method. The three-dimensional viscous-inviscid interaction code used here is the accurate and fast MIRAS ...

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  • Validation of a Numerical Quasi-One-Dimensional

    2020-1-17 · Validation of a Numerical Quasi-One-Dimensional Model for Wave Rotor Turbines With Curved Channels Stefan Tüchler, ... throughflow microwave rotor turbine featuring symmetrically cambered passage walls aimed at delivering approximately 500 W of shaft power. ... Three-Dimensional Numerical Simulation of Gradual Opening in a Wave Rotor Passage,”

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  • Computations of a Film Cooled Turbine Rotor Blade

    A numerical investigation of film cooling on a turbine rotor blade has been carried out. The computations were performed with a 3D-Navier-Stokes code utilizing an unstructured solution adaptive grid methodology (Dawes (1992)). The code uses a low Reynolds number k-epsilon model for prescribing the Reynolds stresses.

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  • Three-dimensional flows and loss generation

    Effects of the incidence on cascade three-dimensional flows and on the associated loss mechanism occurring in a low-speed linear turbine rotor cascade are described. For five different incidences from 7.2 to -53.3 degrees, the cascade flow was surveyed in detail at fifteen or sixteen planes located axially throughout the cascade. Blade-to-blade flows at the cascade midspan and near the ...

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  • Effect of Coupling Types on Rotor Vibration

    2018-3-27 · coupling misalignment on vibration of rotor gas turbine. It is reported that for unbalance highest amplitude is at 1X of the shaft speed and for misalignment highest amplitude is at 2X of the shaft speed. V.Hariran ,P.S.S. Srinivasan[5] studied the effect of unbalance on a rotor system with flexible flange coupling. The experimen-

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  • Three-Dimensional Navier-Stokes Analysis of

    2014-12-24 · Luo, J, & Lakshminarayana, B. 'Three-Dimensional Navier-Stokes Analysis of Turbine Rotor and Tip-Leakage Flowfield.' Proceedings of the ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition.

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  • Calculation of Complete Three-Dimensional Flow in

    2015-3-23 · Dian-Kui, L, & Le-Jian, J. 'Calculation of Complete Three-Dimensional Flow in a Centrifugal Rotor With Splitter Blades.' Proceedings of the ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition.

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  • Fleet360* Total Plant Service Solutions Steam Turbine ...

    2020-8-25 · The routine use of three-dimensional (3D) blading has allowed many traditional efficiency limitations to be overcome. With 3D ... turbine are reduced through the enhanced shaping of blade ... The new rotor had three more stages in the HP section to help provide the additional power required. The retrofit cylinder

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  • A Comparison of Two- and Three-Dimensional S809

    2013-10-16 · S809 airfoil using a 10-m, three-bladed, horizontal-axis wind (C1mx)· Second, it is not yet clear how the three-dimensional (3­ turbine (HA WT). The rotor employed a constant-chord (.457 m) D) rotational effects change the airfoil section properties in the blade geometry with zero twist. Blade structural loads were stalled region.

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  • Three-Dimensional Unsteady Flow in a Single Stage

    Abstract. In this paper the importance of unsteady flow effects is demonstrated for the accelerated turbine and decelerated compressor flow. For the understanding of the entire core flow in turbomachines, it is necessary to investigate the unsteady three-dimensional flow field inside the blade passages.

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  • A comparison of two- and three-dimensional S809

    1990-2-1 · @article{osti_7109655, title = {A comparison of two- and three-dimensional S809 airfoil properties for rough and smooth HAWT (horizontal-axis wind turbine) rotor operation}, author = {Musial, W D and Butterfield, C P and Jenks, M D}, abstractNote = {At the Solar Energy Research Institute (SERI), we carried out tests to measure the effects of leading-edge roughness on an S809 airfoil using a 10 ...

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  • STRUCTURAL AND THERMAL ANALYSIS OF STEAM

    2018-11-1 · analysis. The three dimensional model of the Steam Turbine Casing was created using the CATIA V5-R20 software. Boundary conditions were given on the finite element model through ANSYS. Key Words: Steam turbine casing, Structural Analysis. 3-D model, CATIA, Thermal expansion, FEM, Turbine rotor, start up cycles, ANSYS 1. INTRODUCTION

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  • SIMULATION OF HYDROKINETIC TURBINES IN

    2020-10-6 · turbine rotor as body forces in the momentum equations, without having a physical representation of the blade geometry on the computational mesh. These simplified methods for turbine representation can then be used to simulate arrays of turbines and wind farm dynamics, even including oceanic and atmospheric turbulence [5, 6, 24].

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  • GTL Reports — MIT Gas Turbine Laboratory

    'Three-Dimensional Inviscid Flow Through A Highly-Loaded Transonic Compressor Rotor', 1976, 126. McGahan, W., 'The Incompressible, Turbulent Wall Jet in a an Adverse Pressure Gradient', 1965, 82.

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  • CALCULIX - A Free Software Three-Dimensional

    2021-7-9 · A Free Software Three-Dimensional Structural Finite Element Program. CalculiX is a package designed to solve field problems. The method used is the finite element method. With CalculiX Finite Element Models can be build, calculated and post-processed. The pre- and post-processor is an interactive 3D-tool using the openGL API.

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