The fluid dynamic basis for actuator disc and rotor theories
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| Corporate Author: | |
| Format: | eBook |
| Language: | English |
| Published: |
Amsterdam, Netherlands
IOS Press,
2022.
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| Edition: | Revised second edition. |
| Subjects: | |
| Online Access: | https://www.lib.tsu.ru/mminfo/2023/EBSCO/3329099.pdf |
Table of Contents:
- 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