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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 349 for “"centrifugal"”.
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Centrifugal refrigeration with ammonia
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1947
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Centrifugal pendulums with large motions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1962.
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High-Torque Capacity Compliant Centrifugal Clutches
This thesis developed high-torque-capacity floating opposing arm clutches that are manufactured with standard economical manufacturing processes, while maintaining critical performance characteristics. Contact engagement speed and torque capacity models were created for the Hoffco-Comet, …
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Spaceborne centrifugal relays for spacecraft propulsion
Acceleration using centrifugal relays is a recently discovered method for the acceleration of spaceborne payloads to high velocity at high thrust. Centrifugal relays are moving rotors which progressively accelerate reaction mass to higher velocities. One important engineering problem consists of …
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Secondary flows in centrifugal compresser impellers
… made in a 1 metre diameter, shrouded, centrifugal (Ghost) impeller running at 500 rpm are presented. Relative velocities and rotary stagnation pressures $(p*=p-\frac{1}{2}\ρω^{2}r^{2}+\frac{1}{2}\ρW^{2})$ were measured on five cross-sectional planes between the impeller inlet and the …
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Active control of centrifugal-compressor surge
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Impeller-diffuser interaction in centrifugal compressors
… interaction on the performance of a centrifugal compressor stage. The principal finding from the study was that the most influential aspect of this unsteady interaction was the effect on impeller tip leakage flow . In particular, the unsteadiness due to the upstream potential effect …
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Design of supercritical carbon dioxide centrifugal compressors
Los potenciales problemas que puedan presentarse en el futuro asociados a la escasez de recursos energéticos convencionales (combustibles fósiles), han promovido desde hace décadas el desarrollo de sistemas renovables por un lado y por otro de sistemas de alta eficiencia. En este ámbito, los ciclos …
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An investigation of centrifugal blood-cell separation
This dissertation investigated the centrifugal, batch separation of whole blood into subpopulations of red blood cells (erythrocytes) and white blood cells (leukocytes). Separations took place in a custom-built centrifuge (using a seal-less, anti-twisting feed/withdrawal system) containing, a 25-ml …
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Compliant Centrifugal Clutches: Design, Analysis, and Testing
<p>Existing classes of centrifugal clutch concepts were reviewed. The pseudo-rigid-body model (PRBM), rigid-body replacement synthesis, force-deflection analysis, compliance potential evaluation, and compliant concept evaluation were used to develop effective new centrifugal clutch concepts. These …
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Combined bioreaction and separation in centrifugal fields
… been to investigate the principle of combined centrifugal bioreaction-separation. The production of dextran and fructose by the action of the enzyme dextransucrase on sucrose was employed to elucidate some of the principles of this type of process. Dextran is a valuable pharmaceutical product …
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Enzymatic production of oligosaccharides in centrifugal fields
… technique, and (c) various applied centrifugal fields, that a high-speed centrifuge could be used to control the formation of galacto-oligosaccharides whilst removing the enzyme from the reaction products. By layering a suspension of insolubilised β-galactosidase on top of a lactose …
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The Nonlinear Behavior of a Centrifugal Pendulum
Made available in DSpace on 2014-12-12T00:25:56Z (GMT). No. of bitstreams: 1 7414587.pdf: 1317932 bytes, checksum: cd03788b8d4ba41eb3d1090f871e883a (MD5) Previous issue date: 1974
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Adaptive Hydraulics for Improved Centrifugal Pump Efficiency
Centrifugal pumps are used ubiquitously for fluid transport in industrial and municipal systems including: clean and waste water systems, pumped hydro energy storage, closed loop HVAC heating, and irrigation. Globally, pumps consume hundreds of billions of kilowatt hours of electricity each year. …
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On the centrifugal instability of nonaxisymmetric flows,
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1974.
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A methodology for centrifugal compressor stability prediction
The stable operation of centrifugal compressors is limited by well-known phenomena, rotating stall and surge. Although the manifestation of the full scale instabilities is similar to the ones observed in axial machines, the stall inception in centrifugal compressors is less well understood. This …
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Instabilities and unsteady flows in centrifugal pumps
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Improved return passages for multistage centrifugal compressors
… design concept for return passages in multistage centrifugal compressors. Flow in a baseline return passage is analyzed to identify loss sources that have substantial potential for reduction. For the geometry analyzed, it is found that mismatched incidence of the return vane, separation on the hub …
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