Browsing by Author "Palazzolo, Alan B."
Now showing items 1-20 of 41
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Lee, Sang Jin (2009-05-15)A novel active material for controllable, high work density applications was designed, fabricated, analyzed, and tested. This active material uses a lens-shaped element to implement simple shear motion with gas pressure ...
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Han, Xu (2012-02-14)Induction motors and Variable Frequency Drives (VFDs) are widely used in industry to drive machinery trains. However, some mechanical trains driven by VFD-motor systems have encountered torsional vibration problems. This ...
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Rimpel, Aaron Michael (2009-05-15)Hydrodynamic flexure pivot tilting pad gas bearings (FPTPGBs) can enable successful operation of oil-free microturbomachinery. This work presents the experimental and analytical study of such bearings with different damper ...
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Kumar, Manish (2009-05-15)Air foil bearings offer several advantages over oil-lubricated bearings in high speed micro-turbomachinery. With no contact between the rotor and bearings, the air foil bearings have higher service life and consequently ...
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Wiesenborn, Robert Kyle (Texas A&M University, 2007-04-25)Magnetic bearings use variable attractive forces generated by electromagnetic control coils to support rotating shafts with low friction and no material wear while providing variable stiffness and damping. Rotor deflections ...
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Alvarez Sanchez, Adrian (2020-04-08)This project comprises the engineering design and assessment of the novel above critical-point Carbon Dioxide cycle technology integrated with a solar Parabolic Trough Collector (PTC) plant. To accomplish this, preliminary ...
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Dynamic and Static Characteristics of a Rocker-Pivot, Tilting-Pad Bearing with 50% and 60% Offsets. Kulhanek, Chris David (2012-02-14)Static performance and rotordynamic coefficients are provided for a rocker-pivot, tilting-pad journal bearing with 50 and 60 percent offset pads in a load-between-pad configuration. The bearing uses leading-edge-groove ...
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Niu, Yaying (2010-01-14)Oil-free microturbomachinery (MTM) are inevitably subjected to base or foundation excitations: multiple periodic load excitations from internal combustion (IC) engines in turbochargers, for example. Too large base excitations ...
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Liu, Juanyu (2009-06-02)Gravel aggregates had been used extensively in the Houston District of Texas Department of Transportation (TxDOT) for continuously reinforced concrete pavements construction for many years. However, some of these pavements ...
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Ye, Dan (2009-05-15)Concrete curing has long been realized to be important to produce durable concrete. Curing compound is widely used to cure concrete in the field. The current curing membrane evaluation method ASTM C 156, however, is incapable ...
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Schomerus, Aaron Michael (2009-05-15)Torsional vibration can be characterized as the cyclic variation of shaft speed, which can cause various failures in rotating machines, such as: gear-tooth breakage, blade-off due to blade fatigue in steam turbines, break-off ...
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Vance, John M.; Palazzolo, Alan B.; Zeidan, Fouad Y. (Texas A&M University. Turbomachinery Laboratories, 1987)Electrical damage to turbomachinery parts has caused a number of machinery failures and many hours of costly downtime. The problem of electrical voltages and currents being generated in non-electrical machines has puzzled ...
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Jones, Adam Matthew (2009-06-02)Wire mesh dampers are under investigation because they are seen as replacements for squeeze film dampers as a source of direct stiffness and damping at bearing locations. There are several advantages of wire mesh dampers ...
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Sun, Yifu (2012-10-19)A complete method for calculating the largest Lyapunov exponent is developed in this thesis. For phase space reconstruction, a time delay estimator based on the average mutual information is discussed first. Then, embedding ...
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Wadhvani, Vishal Ashok (2011-08-08)Magnetic bearings are increasingly being used in a wide variety of applications in the industry such as compressors, turbines, motors, generators etc. Also, there are different types available depending upon their construction. ...
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Palazzolo, Alan B.; Locke, Stephen R.; Calistrat, Michael; Clark, Robert W.; Ayoub, Akram; Calistrat, Dan; Tang, Punan (Texas A&M University. Turbomachinery Laboratories, 1992)Gear couplings can produce large static forces and moments that can affect the vibrations of turbomachinery, even with nearly perfect alignment. Research, testing and case histories have verified this theory and are reported. ...
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Zhang, Zhengxin (2010-10-12)A high temperature magnetic bearing system using high temperature permanent magnets from Electron Energy Corporation (EEC) is under development. The system consists of two radial bearings, one thrust bearing, two radial ...
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Gandhi, Varun R. (2010-07-14)The Electron Energy Corporation (EEC) along with the National Aeronautics and Space Administration (NASA) is researching magnetic bearings. The purpose of this research was to design and develop a high-temperature (1000�F) ...
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Lee, Chung-Chyi (Texas A&M University. Libraries, 1992)This study considers a submerged body moving from rest to a constant speed in the nonlinear free surface for a truncated water region. A higher order boundary element method (HOBEM) with a fourth order Runge-Kutta time ...
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Ryu, Keun (2009-05-15)Micro-turbomachinery (MTM) implements gas bearings in compact units of enhanced mechanical reliability. Gas bearings, however, have little damping and are prone to wear during frequent rotor start-up and shut down conditions. ...