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The Fluid Dynamic Basis for Actuator Disc and Rotor Theories : Revised Second Edition
| The Fluid Dynamic Basis for Actuator Disc and Rotor Theories : Revised Second Edition |
| Autore | van Kuik G. A. M |
| Edizione | [1st ed.] |
| Pubbl/distr/stampa | 2022 |
| Descrizione fisica | 1 online resource (162 pages) |
| Soggetto topico | Technology, engineering, agriculture |
| Soggetto non controllato |
actuator disc
history wind turbine propeller conservative forces non-conservative forces |
| ISBN |
9781643682792
1643682792 |
| Formato | Materiale a stampa  |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto |
Intro -- Title Page -- Preface -- Reading guide -- Acknowledgement -- Nomenclature -- More than a century of rotor research -- Introduction -- History of the actuator disc momentum theory -- The British School -- The German and Russian School -- The contribution of Joukowsky and Betz to the vortex theory of propellers -- The Betz-Joukowsky limit for wind turbines -- From actuator disc to rotor aerodynamics -- Why this book? -- Force fields in fluid dynamics -- Introduction -- The equation of motion and the coordinate systems -- Equivalence of the kinematic and dynamic methods -- Conservative and non-conservative force fields -- Force fields and energy -- Work done by force fields -- Choice of reference system -- Work done by non-conservative force fields -- Pressure as a conservative force in momentum balances -- Pressure interpreted as potential energy -- Definition of (non-)conservative forces as used in this book -- Evaluation -- Force fields and vorticity -- Introduction -- The role of Helmholtz's conservation laws -- Generation of actuator disc vorticity -- Convection of actuator disc vorticity -- Convection of rotor vorticity -- Evaluation -- The disc as representation of a rotor -- Introduction -- Loads and power of a Joukowsky disc and rotor -- The actuator disc equation -- The rotor blade -- Power and thrust coefficients for Joukowsky discs / rotors -- The transition from a B-bladed rotor to the Joukowsky disc -- Comparison of the flow fields of a disc and rotor -- Evaluation -- Analysis of Froude's actuator disc flows -- Introduction -- One-dimensional momentum theory -- The momentum balance -- Momentum theory without conservative forces -- Momentum theory including conservative forces, applied to a stream annulus -- Numerical assessment of Froude's actuator disc performance -- The model and accuracy of computation.
Comparison of calculated performance with momentum theory results -- Comparison with experimental results -- Flow details -- Flow and pressure patterns -- Properties of the wake boundary -- Pressure and velocity at the disc -- Pressure at the axis -- Evaluation -- Analysis of Joukowsky's actuator disc flows -- Introduction -- Two-dimensional momentum theory -- The equations for a Joukowsky disc -- The disc load -- The far wake outside the vortex core -- The vortex core -- The momentum, mass and energy balance -- Limit values of the Joukowsky momentum theory -- Results for , 0. -- Propeller discs with a wake of constant radius or with wake expansion -- The static disc or disc in hover -- The maximum efficiency of a wind turbine disc -- The efficiency of propeller discs -- Numerical assessment of flow details -- The numerical model -- Comparison of wind turbine and propeller discs at =1 -- Comparison of a wind turbine and propeller disc with similar wake expansion -- The role of swirl and conservative pressure distributions -- Comparison of the Joukowsky and Betz-Goldstein solutions -- Evaluation -- The velocity distribution at the disc -- Introduction -- The absolute velocity -- Wind turbine flows -- Propeller flows -- Explanation of the (non-)uniformity of vs -- The axial velocity -- Momentum balance per annulus -- An engineering model for the axial velocity at a high wind turbine disc -- The radial velocity -- Evaluation -- Special topics: cons. loads at a thick disc & -- blade tip -- Introduction -- The generation of a Rankine vortex -- Wu's actuator disc equation -- The force field required to generate a Rankine vortex -- Interpretation of the radial component of the load -- Numerical assessment of the impact of the radial load -- The rotor blade -- Inboard motion of a tip vortex of a wind turbine blade. Side step: conservative, spanwise load on an elliptic wing -- Conservative and non-conservative blade loads -- Experimental and numerical results for a model wind turbine rotor -- Determination of the conservative tip load -- The tip vortex trajectory -- The role of conservative forces -- Evaluation -- From disc theory to BEM models: the tip correction -- Introduction -- Development of the tip correction -- In BEM methods -- In actuator disc, actuator line and lifting line methods -- The distribution of the axial velocity -- The radial distribution -- The azimuthal distribution: averaged or at blade position -- The azimuthal distribution: decambering of aerofoils -- The radial distribution of blade -- The aspect ratio as a measure for tip effects -- Conservative tip load and the tip vortex trajectory -- Evaluation -- Epilogue -- Vector expressions in cylindrical coordinates -- Balance of angular momentum -- The blade load expressed as pressure distribution -- The potential flow model -- Components of the model -- Convergence scheme -- Verification, sensitivity and accuracy -- Bibliography -- Index. |
| Record Nr. | UNINA-9910629581603321 |
van Kuik G. A. M
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| 2022 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
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Selected Problems in Fluid Flow and Heat Transfer / Artur J. Jaworski
| Selected Problems in Fluid Flow and Heat Transfer / Artur J. Jaworski |
| Autore | Jaworski Artur J |
| Pubbl/distr/stampa | MDPI - Multidisciplinary Digital Publishing Institute, 2019 |
| Descrizione fisica | 1 electronic resource (460 p.) |
| Soggetto topico | History of engineering and technology |
| Soggetto non controllato |
thermal performance
microbubble pump particle deposition flow oscillation orthogonal jet flat plate gas turbine engine air heater flow behavior transonic compressor friction factor nonlinear thermal radiation oscillators porous cavity POD turbulent flow thermosyphon turbulence mass transfer tip leakage flow capture efficiency pipe flow correlation decomposition dimensionalities heat transfer pressure loss CANDU-6 numerical modeling CFD magnetic field boundary layer two-phase flow heat transfer performance Colebrook-White computational burden phase change surrogate model Padé polynomials traveling-wave heat engine flow regime numerical simulation energetics ( A g ? F e 3 O 4 / H 2 O ) hybrid nanofluid pumps BEM SPIV acoustic streaming microbubbles Aspen® push-pull Positive Temperature Coefficient (PTC) elements iterative procedure transient analysis spiral fin-tube toxic gases unsteady heat release rate water hammer method of moment visualization superheated steam impingement heat transfer enhancement X-ray microtomography moderator wind turbine flow rate fin-tube flue gas actuator disc temperature distributions supercritical LNG sharp sections moment of inertia Colebrook equation pump efficiency tower OpenFOAM computational fluid dynamics chemical reaction pump performance logarithms numerical results downwind thermodynamic triaxial stress flow friction energy conversion entropy generation zigzag type inertance-compliance section aspect ratios laminar separation bubble axial piston pumps thermogravimetry pressure drop load resistances vortex breakdown T-section prism flow-induced motion centrifugal pump load vortex identification decomposition region condensation performance characteristics pipes detached-eddy simulation Computational Fluid Dynamics (CFD) simulation thermal cracking real vehicle experiments bubble size thermal energy recovery hydraulic resistances concentration tower shadow fire-spreading characteristics thermoacoustic electricity generator bubble generation multi-stage thermal effect ferrofluid PHWR fluidics multiphase flow printed circuit heat exchanger particle counter dew point temperature |
| ISBN |
9783039214280
3039214284 |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Record Nr. | UNINA-9910367758603321 |
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Jaworski Artur J
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| MDPI - Multidisciplinary Digital Publishing Institute, 2019 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
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Wind Turbine Aerodynamics / Wen Zhong Shen
| Wind Turbine Aerodynamics / Wen Zhong Shen |
| Autore | Shen Wen Zhong |
| Pubbl/distr/stampa | MDPI - Multidisciplinary Digital Publishing Institute, 2019 |
| Descrizione fisica | 1 electronic resource (410 p.) |
| Soggetto topico | History of engineering and technology |
| Soggetto non controllato |
simplified free vortex wake
H-type VAWT variable pitch wind tunnel experiment rotor blade optimization Non-dominated Sorting Genetic Algorithm (NSGA-II) wake effect wind turbine noise propagation RANS axial steady condition wind turbine blades optimization computational fluid dynamic straight blade typhoon gradient-based image processing actuator line method piezo-electric flow sensor stall turbulence airfoil design vortex ring defects DMST model wind turbine design S809 airfoil dynamic fluid body interaction Computational Fluid Dynamics ABL stability semi-submersible platform random search floating offshore wind turbine blade length adjoint approach Fatigue Loads wind turbine optimization wind turbine airfoil particle swarm optimization rotational augmentation NREL Phase VI mechanical performance coupling of aerodynamics and hydrodynamics tip speed ratio aerodynamics oscillating freestream super-statistics blade element momentum theory wind turbine wind energy boundary layer separation wind turbine blade optimization actuator disc dynamic stall complex terrain laminar-turbulent transition SCADA OpenFOAM atmospheric stability computational fluid dynamics economic analysis OC5 DeepCWind wind tunnel actuator disk meso/microscale cost of energy power coefficient pitch oscillation condition monitoring aerodynamic characteristics blade parametrization wind turbine wakes truss Spar floating foundation wind resource assessment wind shear wind turbine noise source design low wind speed areas aerodynamic wind farm met mast measurements turbulent inflow VAWTs (Vertical axis wind turbines) thermography wind speed extrapolation MEXICO wind turbine wake aerodynamic force layout optimization H-type floating VAWT LES NACA0012 |
| ISBN |
9783039215256
3039215256 |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Record Nr. | UNINA-9910367755203321 |
|
Shen Wen Zhong
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| MDPI - Multidisciplinary Digital Publishing Institute, 2019 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
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Wind Turbine Aerodynamics II
| Wind Turbine Aerodynamics II |
| Autore | Shen Wen Zhong |
| Pubbl/distr/stampa | Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021 |
| Descrizione fisica | 1 online resource (144 p.) |
| Soggetto topico | Technology: general issues |
| Soggetto non controllato |
actuator disc
AD/NS aeroacoustics aerodynamic characteristics aerodynamics blade element momentum CFD computational fluid dynamics coned rotor delayed detached-eddy simulation Gurney flap n/a noise control noise modelling orthopter power coefficient shear flow tilt angle tip loss correction torque coefficient turbulence unsteady aerodynamics vertical axis wind turbine wind tunnel wind tunnel experiment wind turbine wind turbine aerodynamics wind turbine airfoil |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Record Nr. | UNINA-9910557520603321 |
|
Shen Wen Zhong
|
||
| Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
| ||