DEGLI STUDI DI UDINE Dottorato in Tecnologie Chimiche ed Energetiche FLUID DYNAMIC MODELLING OF WIND TURBINES sec. D Vr 0 D Vt Vz Vr Vt 3 Relatori: Prof.Ing. Lorenzo BATTISTI Prof.Ing. Piero PINAMONTI Dottorando: Dott.Ing. Luca ZANNE Udine 21 Maggio 2010 Summary Introduction PART I : HAWT analysis HAWT Fluid dynamics A turbomachinery approach Inverse design Summary PART II : VAWT analysis VAWT fluid dynamics VAWT experimental analysis VAWT free vortex wake Results and
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Midterm Exam II Solution‚ ME 342 Fluid Mechanics (Spring 2013) 1. Consider a steady‚ incompressible‚ y=+h b viscous flow of viscosity due to y a pressure gradient x inside a channel of two fixed u=u(y) plates at a distance of 2h‚ as shown in the figure. Neglect a gravity effect. The channel width y=h b is W and it is very long compared to the channel length L (i.e.‚ W>>L) so that it is still valid to assume that the channel flow is a two-dimensional plane flow ( ) and an axial flow (v = w = 0)
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Quantum Mechanics Notes Matter can be understood by applying two scientific models: particles‚ and waves Particle Models Particles are objects that are hard‚ have mass‚ and move according to Newtonian mechanics. Particles are a macroscopsic model which can be applied to the microscopic world. Kinetic model of a gas: gas molecules are small‚ hard particles bouncing off of one another and the walls of their container. Macroscopic phenomena of pressure and volume are explained in terms of masses
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I.Cerebrospinal Fluid Cerebrospinal fluid is a clear‚ colorless liquid produced within spaces called ventricles in the brain. It is also found inside the subarachnoid space of the meninges which surrounds both the brain and the spinal chord. It bathes the exposed surfaces of the central nervous system‚ and completely surrounds the brain and spinal cord. In addition‚ a space inside the spinal chord called the central canal also contains cerebrospinal fluid. CFS acts as a cushion for the neuraxis
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Coolant and cutting fluid management Contamination of coolants and loss of cutting fluid through chip waste is one of the most time consuming and costly situations for a company. That is where fluid management comes into play. There are many ways to fight contamination and fluid loss. Loss of cutting fluid and coolants through chip waste can be solved with a briquetter. A briquetter is a machine that compresses your chips and turnings into a briquette squeezing out ninety percent of your expensive
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IP Proposal I. Title- Correction fluid from chalk II. Problem -how to make correction fluid from chalk dust safer? a.) Hypothesis - If this correction fluid won’t have any solvents/chemicals‚ then it won’t be harmful to the nose/body. b.) Objectives of the study -the objective is to create a safer correction fluid‚ to avoid it from being an inhalant. c.) Significance of the study -the significance of the study is to reduce the solvents and other chemicals that are harmful to the body when
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Absolute entropy is entropy calculated relative to the absolute reference point determined by the third law of thermodynamics. Absolute humidity (specific humidity or humidity ratio) is the mass of water vapor present in a unit mass of dry air; that is‚ it is the ratio of the mass of water vapor to the mass of dry air in atmospheric air. Absolute pressure is the actual pressure at a given position and it is measured relative to absolute vacuum (i.e.‚ absolute zero pressure). Throughout this
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of air and other gaseous fluids and with the forces acting on bodies in motion relative to such fluids http://www.merriam-webster.com/dictionary/aerodynamics Other: aerios‚ concerning the air‚ and dynamis‚ which means force. http://www.grc.nasa.gov/WWW/K-12/airplane/bga.html Bernoulli’s Principle: • The relationship between the velocity and pressure exerted by a moving liquid • States that for an inviscid flow‚ an increase in the speed of the fluid occurs simultaneously with
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Centre Course Year/ Trimester Session : Centre for Foundation Studies (CFS) : Foundation in Science : Year 1 / Trimester 1 : 201401 Unit Code Unit Title : FHSC1014 : Mechanics Tutorial 4: Application of Newton’s Laws. 1. The distance between two telephone poles is 50.0 m. When a 1.00 kg bird lands on the telephone wire midway between the poles‚ the wire sags 0.200 m. Draw a free-body diagram of the bird. How much
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GCE Examinations Mechanics Module M1 Advanced Subsidiary / Advanced Level Paper A Time: 1 hour 30 minutes Instructions and Information Candidates may use any calculator except those with a facility for symbolic algebra and / or calculus. Full marks may be obtained for answers to ALL questions. Mathematical and statistical formulae and tables are available. This paper has 7 questions. When a numerical value of g is required‚ use g = 9.8 m s-2. Advice to Candidates You must show sufficient
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