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Full-scale Investigation on the Blade Motion of the PV-2 Helicopter Rotor by Eugene Migotsky Pdf
An experimental investigation of the PV-2 helicopter rotor has been conducted at the Langley Laboratory of the National Advisory Committee for Aeronautics to determine the basic characteristics of a fully articulated rotor.
Compressor-blade Vibration and Performance in a J47-23 Turbojet Engine Under Conditions of Rotating Stall by Morgan P. Hanson,Donald F. Johnson,Andre J. Meyer Pdf
Advances in Wind Turbine Blade Design and Materials by Povl Brondsted,Rogier P. L Nijssen,Stergios Goutianos Pdf
Advances in Wind Turbine Blade Design and Materials, Second Edition, builds on the thorough review of the design and functionality of wind turbine rotor blades and the requirements and challenges for composite materials used in both current and future designs of wind turbine blades. Reviews the design and functionality of wind turbine rotor blades Examines the requirements and challenges for composite materials used in both current and future designs of wind turbine blades Provides an invaluable reference for researchers and innovators in the field of wind
Advances in wind turbine blade design and materials by H. Söker Pdf
This chapter deals with loads on wind turbine blades. It describes the load generating process, wind fields, and the concepts of stresses and strains. Aerodynamic loads, loads introduced by inertia, gravitation and gyroscopic effects, and actuation loads are discussed. The loading effects on the rotor blades and how they are interconnected with the dynamics of the turbine structure are highlighted. There is a discussion on how stochastic loads can be analysed and an outline of cycle counting methodology. The method of design verification testing is briefly described.
Approximate design method for high-solidity blade elements in compressors and turbines by John Stanitz Pdf
An approximate blade-element design method is developed for compressible or incompressible nonviscous flow in high-solidity stators or rotors of axial-, radial-, or mixed-flow compressors, turbines, or two-dimensinal cascades. The method is based upon channel-type flow between blade elements on a specified surface of revolution that lies between the hub and shroud (casing) and is concentric with the axis of the compressor turbine. The blade elements is designed for prescribed velocities along the blade-element profile as a function of distance along meridonal lines on the surface of revolution. Two numerical examples are presented: (1) the design of a blade-element profile for a plane two-dimensional cascade in compressible flow with the prescribed velocities along the profiles; and (2) the design of a blade element for the impeller of a mixed-flow centrifugal compressor.
Advances in wind turbine blade design and materials by L. MISHNAEVSKY Pdf
An overview of the micromechanics of materials methods and approaches that can be used for the modelling of wind turbine blade composites is given in this chapter. Using the various modelling methods reviewed here, the strength, stiffness and lifetime of composite materials can be predicted and the suitability of different groups of materials for applications in wind turbine blades can be analysed. The effects of interface and matrix properties, fibre clustering and nanoreinforcement on the strength and lifetime of composites are studied in a number of simulations, and some examples of the analysis of microstructural effects on the strength and fatigue life of composites are provided.
Gender and Parenting in the Worlds of Alien and Blade Runner by Amanda DiGioia Pdf
Gender and Parenting in the Worlds of Alien and Blade Runner is a comparative, gendered analysis study of Ridley Scott’s contributions to the genre of science fiction and horror cinema, showcasing how patriarchal and gendered expectations regarding women, usually associated with the past, still run rampant.
The sole survivor of a gruesome killing spree uncovers a small town's twisted secrets when she returns to the scene of the crime twenty-five years later.
Balanced on the Blade's Edge by Lindsay Buroker Pdf
Colonel Ridge Zirkander isn’t the model of military professionalism—he has a tendency to say exactly what’s on his mind, and his record has enough demerits to wallpaper the hull of an airship—but as the best fighter pilot in the Iskandian army, he’s used to a little leniency from his superiors. Until he punches the wrong diplomat in the nose and finds himself issued new orders: take command of a remote prison mine in the inhospitable Ice Blades Mountains. Ridge has never been in charge of anything larger than a flier squadron—what’s he supposed to do with a frozen fortress full of murderers and rapists? Not to mention the strange woman who shows up right before he arrives… Sardelle Terushan wakes from three hundred years in a mage stasis shelter, only to realize that she is the last of the Referatu, the sorcerers who once helped protect Iskandia from conquerors. Their subterranean mountain community was blown up in a treacherous sneak attack by soldiers who feared their power. Everyone Sardelle ever knew is dead, and the sentient soulblade she has been bonded to since her youth is buried in the core of the mountain. Further, what remains of her home has been infested by bloodthirsty miners commanded by the descendants of the very soldiers who destroyed her people. Sardelle needs help to reach her soulblade—her only link to her past and her last friend in the world. Her only hope is to pretend she’s one of the prisoners while trying to gain the commander’s trust. But lying isn’t her specialty, especially when the world has changed so much in the intervening centuries, and if Colonel Zirkander figures out who she truly is, he’ll be duty-bound to sentence her to the only acceptable punishment for sorcerers: death.
Advances in wind turbine blade design and materials by P.D. Clausen,F. Reynal,,D.H. Wood Pdf
Small wind turbine blades share a number of features with large blades, but have some important differences. The two main differences are their much higher rotational speed, which causes more fatigue cycles and higher yaw moments, and their operation at low Reynolds number, which means that thick aerofoil sections cannot be used near the root. This chapter discusses the design challenges arising from these differences, the materials commonly used for blade manufacture, and the fatigue testing of small blades. The use of timber is highlighted for very small blades, and fibre-reinforced composite manufacture of larger ones is discussed in terms of sustainability, conformity of manufactured shape, and fatigue behaviour.
Static Stresses on Wide-bladed Propellers by Justin H. McCarthy Pdf
Static stresses were obtained in laboratory experiments for a destroyer propeller, having aerofoil blade sections, and a super-cavitating propeller, having wedge-shaped blade sections, using specially constructed pressure chambers that allowed the blade faces to be loaded under air pressure. A new method for applying beam theory is presented that closely predicts the magnitude and distribution of radial stresses on the destroyer propeller blade. For the supercavitating propeller, neither the proposed beam-theory method nor a particular computerized-shell analysis can be considered entirely satisfactory for prediction of blade stresses. (Author).
