Browsing by Subject "Turbomachinery"
Now showing items 1-20 of 20
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(2015-12-09)Gas turbine engine manufacturers push for increasingly simpler squeeze film damper (SFD) designs that can still provide necessary damping to suppress rotor vibrations and offer stability to rotor-bearing systems. The work ...
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(2009-05-15)Comprehensive modeling of gas foil bearings (GFBs) anchored to reliable test data will enable the widespread usage of GFBs into novel turbomachinery applications, such as light weight business aircraft engines, hybrid fuel ...
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(2017-12-04)Data are available for a previously tested annular seal with no swirl brakes (NSB). The NSB seal design was modified by adding slots at the inlet to produce a swirl brake (SB) seal. Tests were conducted to evaluate the ...
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(2012-08-16)The MVP is a special type of Electrical Submersible Pumps (ESPs) manufactured by Baker Hughes, model no. G470, and is capable of handling multiphase flow up to 70% Gas Volume Fraction (GVF). Flows at high GVF cause ...
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(2017-12-11)Understanding the rotordynamic and leakage characteristics of gas annular seals is important for the design of efficient and reliable turbomachinery. This work sets the foundation to advance the understanding of gas ...
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(2011-08-08)In todays highly maneuverable jet aircraft designs, aircraft are required to have a propulsion system that can operate during sudden accelerations and rapid changes in angle-of-attack. Consequently, the compressor of the ...
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(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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(2018-07-27)A series of experimental studies were conducted in order to investigate the generation and growth of A series of experimental studies were conducted in order to investigate the generation and growth of aerodynamic losses ...
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(2012-10-19)Annular seals are devices used in turbomachinery to avoid flow losses which reduce efficiency. The dynamic stability of the machine is also improved by the seal. Thus, it is an important subject to understand the flow ...
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(2009-05-15)This dissertation discusses research on the leakage and rotordynamic characteristics of pocket damper seals (PDS) and see-through labyrinth seals, presents and evaluates models for labyrinth seal and PDS leakage and PDS ...
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(Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu), 1982)The Life Cycle Costs (LCC) for high performance, centrifugal and axial flow turbomachinery such as gas turbines, compressors and pumps is very strongly influenced by fuel (energy) consumption and by maintenance costs. ...
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(2019-04-08)High speed turbomachinery uses tilting pad journal bearing (TPJB) to support rotor loads (static and dynamic). Over the years, continuous efforts have produced machines operating at increasing operating speeds and specific ...
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(2010-07-14)Metal mesh foil bearings (MMFBs) are a promising low cost gas bearing technology for support of high speed oil-free microturbomachinery. Elimination of complex oil lubrication and sealing system by installing MMFBs in oil ...
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(2017-10-09)Annular-labyrinth seals restrict leakage in turbomachinery but may provide unwanted destabilizing forces. This work provides measurements of an interlockinglabyrinth gas seal to further the understanding of leakage ...
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(2014-07-02)Research on high-speed air-breathing propulsion aims at developing aircraft with antipodal range and space access. Before reaching high speed at high altitude, the flight vehicle needs to accelerate from takeoff to scramjet ...
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(2013-08-07)Computational fluid dynamics or CFD isan importanttool thatis used at various stages in the design of highly complex turbomachinery such as compressorand turbine stages that are used in land and air based power generation ...
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(2013-07-19)With increasing rotor flexibility and shaft speeds, turbomachinery undergoes large dynamic loads and displacements. Squeeze film dampers (SFDs) are a type of fluid film bearing used in rotating machinery to attenuate rotor ...
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(2016-07-15)The following dissertation examines several aspects of numerical simulations for turbomachinery flows modeled with an in-house Reynolds-averaged Navier-Stokes solver. The impact of the turbulence model on the solution is ...
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Gas bearings provide a variety of benefits including eliminating the need for oil, reducing power losses, enabling high speed operation, and reducing equipment footprint. Gas bearings have been successfully used in small ...
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(2014-08-07)Static, dynamic, and thermal characteristics (measured and predicted) are presented for a 4-pad, spherical-seat, TPJB with 0.5 pivot offset, 0.6 L/D, 101.6 mm nominal diameter, and 0.3 preload in the LBP orientation. One ...