Available online at www.sciencedirect.com International Journal of Heat and Mass Transfer 51 (2008) 3066–3081 www.elsevier.com/locate/ijhmt Numerical study of film cooled rotor leading edge with tip clearance in 1-1/2 turbine stage Huitao Yang a‚ Hamn-Ching Chen a‚ Je-Chin Han a‚*‚ Hee-Koo Moon b b a Texas A&M University‚ College Station‚ TX 77843‚ United States Solar Turbines Incorporated‚ 2200 Pacific Highway‚ San Diego‚ CA 92101‚ United States Received 28 September 2006 Available
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3.7 Wind Generators: There are three main parts in horizontal axis wind turbines: (1) a rotor‚ (2) an alternator‚ and (3) a tail. The rotor blades are attached to a central hub covered by a nose cone that improves aerodynamics. Three blades are generally present in upwind generators. This entire assembly rotates when wind blows past the blades‚ hence the name “rotor.” In many small wind turbines the rotor is coupled to a shaft which is coupled to an alternator‚ a device that produces AC electricity
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there were three rotors that contained all 26 letters of the alphabet. What would happen was that when someone would press a letter on the keyboard‚ a different letter would pop up on the paper‚ such as A for E‚ D for G‚ F for Z‚ and so on. These substitutions occur because of the positions of the rotors on the inside of the machine. The rotors are first situated at any random letter in the alphabet and when the button is pressed‚ the letter that is at the beginning of the rotor is put onto the paper
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centrifugation tubes is called the centrifuge rotor. Centrifuges are designed so that a number of different rotors can be used by the instrument. There are three types of centrifuge rotors: fixed angle rotors‚ swinging bucket rotors‚ and vertical rotors. Fixed-angle and swinging-bucket rotors are the most commonly used. In a fixed-angle rotor‚ the centrifuge tubes are spun at a fixed angle‚ which is usually approximately 35 degress. Fixed angle rotors are most commonly used for pelleting cells and
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or pneumatic. ROTOR * A SYNCHRO ROTOR is composed of either a single coil of wire wound on a laminated core or a group of coils wound in slots in a laminated core. The laminated core is rigidly mounted on a shaft that is free to turn inside the stator. Two slip rings are mounted on one end of the shaft to supply excitation voltage to the rotor. There are two common types of synchro rotors - the salient-pole rotor and the drum or wound rotor. * The SALIENT-POLE ROTOR has a single coil
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University of Manchester Reliability & Maintainability Group Project: Wind Turbine Group G Alistair Lambert Artur Placha Benjamin Holmes Robert Smithers Simon Hicks Figure 1 (Farmery‚ 2013) Table of Contents Introduction 4 Wind Turbine Components 5 Reliability Analysis 7 FMMA Analysis 9 FMEA and FMECA Analysis 11 System Fault Tree Diagram Analysis and RBD 15 Failure Probability 19 Bowtie Analysis of Hazard Event 20 Results and
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slots of the stator core and receives power from a 3-phase supply [See (Fig. (11.1)]. (ii) a rotor that has a set of salient poles excited by direct current to form alternate N and S poles. The exciting coils are connected in series to two slip rings and direct current is fed into the winding from an external exciter mounted on the rotor shaft. The stator is wound for the same number of poles as the rotor poles. As in the case of an induction motor‚ the number of poles determines the synchronous speed
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[pic] AE2009 Aerospace Materials Assignment Report Use of Smart Materials in Aerospace Industry List of Contents 1. Introduction 3 1. Purpose 4 2. Background 4 3. Scope 4 2. Types and Applications of Smart Materials 1. Piezoelectric Material 5 2. Shape Memory Alloys 14 3. Magnetostrictive Materials 20 4. Rheological Fluids 22 3. Discussion 25 4. Conclusion 26 5. References 27 Abstract This report will cover the different types of smart
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non-permanent magnetic poles on the ferromagnetic rotor. Torque is generated through the phenomenon of magnetic reluctance. There are various types of reluctance motor: Synchronous reluctance Synchronous reluctance motors have an equal number of stator and rotor poles. The projections on the rotor are arranged to introduce internal flux “barriers“‚ holes which direct the magnetic flux along the so-called direct axis. Typical pole numbers are 4 and 6. As the rotor is operating at synchronous speed and there
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consists of a stationary member called stator and a rotating member called rotor. However the induction motor differs from a dc machine in the following aspects. 1. Laminated stator 2. Absence of commutator 3. Uniform and small air gap 4. Practically almost constant speed The AC induction motor comprises two electromagnetic parts: • • Stationary part called the stator Rotating part called the rotor The stator and the rotor are each made up of • • An electric circuit‚ usually made of insulated
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