Browsing by Author "Pettinato, Brian"
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Item Advanced Topics In Centrifugal Compressor Design(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2017) Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, Jeffrey; Pettinato, Brian; Sorokes, James; Turbomachinery Symposium (46th : 2017)Item Advanced Topics In Centrifugal Compressor Design(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018) Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, Jeffrey; Pettinato, Brian; Sorokes, James; Turbomachinery Symposium (47th : 2018)Suggested Topics: Meeting current rotordynamics stability standards CO2 Compressors High flow coefficient/Mach number impellers Coupling and alignment impacts on asymmetric rotordynamics Sour gas/Chloride implications on material selection Complicated high pressure gas properties Validity of CFD modeling Modern manufacturing/forming methodologies Simulation and dynamic process modeling Helmholtz Resonators/Acoustic Attenuation Testing in extreme overload/choke conditions Tripping of compressors in surge conditions Future compressor design/development challenges Control challenges associated with sophisticated cent. compr. Design Performance and mechanical monitoring of compressorsItem API 684 - Torsional Aspects(Texas A&M University. Turbomachinery Laboratories, 2014) Corbo, Mark A.; Pettinato, Brian; Leader, Malcolm E.; Kulhanek, Chris D.; Turbomachinery Symposium (43rd : 2014)Item API High Speed Balancing Acceptance Criteria and Pedestal Dynamics(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018) Pettinato, Brian; Hantz, Brian; Wang, Qingyu; Turbomachinery Symposium (47th : 2018)Acceptance criteria for high-speed balancing of turbomachinery are specified in API standards based on either pedestal velocity or shaft displacement. In addition to performing balancing, the measured displacements can also be used for verification of the unbalance response analysis. Since the pedestals are relatively soft, their dynamics need to be considered in the analysis. In this paper, multiple modal tests were conducted on 3 different pedestals. Different torques on the pedestal bolts were used to study the effect on the measured FRFs. The added-mass method was applied to DH7 pedestals. The calculated modal mass and stiffness were compared to values identified from the measured FRFs. Unbalance verification of some shop orders is compared to the predictions with different ways of characterizing the pedestal dynamics: rigid, mass and stiffness, and the FRFs.Item CS18: Morton Effect with Pedestal Support Influence(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021) Li, Wei; Hatori, Hiroki; Wang, Qingyu; Pettinato, BrianThe Morton effect was encountered during a compressor rotor high speedbalance Morton effect for high speed balance configuration was not consideredin the design phase analysis, and it was a unique experience The high speedbalance pedestal stiffness will be shown to have a significant influence on theMorton effect This presentation will cover:(1) Design phase screening & analysis of this case(2) High speed balance & test floor Morton effect mitigation(3) Morton effect analysis & root cause analysis(4) ConclusionsItem CST15 - Morton Effect With Pedestal Support Influence(Turbomachinery Laboratory, [2019]) Wang, Qingyu; Li, Wei; Hatori, Hiroki; Pettinato, BrianThis Morton effect case is unique since the mitigation method during the high speed balance (increasing the bearing clearance) is opposite to the mechanical test method (decreasing the bearing clearance). The investigation revealed that the complication occurred because the relatively low pedestal stiffness during the high speed balance changed the rotor-dynamics. The original bearing design is shown to be adequate for application in the actual machine.Item Design and Measurement of VFD Motor Driven Blower String Subjected to An Electrical Fault(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2024) Szafran, Andrew; Pettinato, Brian; Feese, TroyItem Development and Application of Very High Flow Covered Stages for Process Centrifugal Compressors(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021) Jariwala, Vishal; Chundru, Rambabu; Pettinato, BrianFor process centrifugal compressor applications, achieving higher flow rates through a given sized compressor can reduce capital cost while still meeting process requirements. Key technologies for enabling such higher flow rates are high flow coefficient (design ϕ > 0.12) and very high flow coefficient (design ϕ > 0.20) aerodynamic staging featuring covered impellers. Since the 1990s the prevalence of high flow coefficient stages has only increased in LNG, Ethylene, and some other compression services. The overall trend has been towards higher flow coefficient stages that push beyond existing experience limits. Applications involving what can be termed as very high flow (VHF) coefficient staging have only first been applied since around 2010. The present work describes the development and application of a family of very high flow (VHF) stages with nominal design flow coefficient of 0.24 and moderate to high Machine Mach Number (Mu) of 0.88. The design is essentially a constrained optimization where the stage aerodynamic performance (range and efficiency) is optimized while still meeting targets related to mechanical robustness and rotor dynamic usability. The first part of the paper describes the aerodynamic design focusing on the features that help address the aerodynamic performance requirements. As the design flow coefficient increases, both the efficiency and the available stable operating range become further challenged, especially as the inlet relative Mach number increases. The presented aerodynamic stage design solution consists of an impeller with both full and splitter blades having unique features and a return channel system that also features three-dimensional Copyright© 2021 by Turbomachinery Laboratory, Texas A&M Engineering Experiment Station 2 blading, which extends into the cross-over section. Subsequent parts of the paper discuss the mechanical design, single stage aerodynamic rig testing, selection examples, and a case study involving results from a tested shop order.Item Discussion Group 04: Lubrication(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2015) Thilagan, Leslie; Pettinato, Brian; Buck, Jeff; Schaefer, Alex; Turbomachinery Symposium (44th : 2015); International Pump Users Symposium (31st : 2015)Item Discussion Group 04: Lubrication(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016) Thilagan, Leslie; Pettinato, Brian; Buck, Jeff; Schaefer, Alex; Haught, Jeff; Shifflett, Ken; Turbomachinery Symposium (45th : 2016); International Pump Users Symposium (32nd : 2016)Item Discussion Group 4 Lubrication(Texas A&M University. Turbomachinery Laboratories, 2013) Thilagan, Leslie; Pettinato, Brian; Rutan, Charles; Buck, Jeff; Schaefer, Alex; International Pump Users Symposium (29th : 2013); Turbomachinery Symposium (42nd : 2013)Item Discussion Group P4/T4: Lubrication(Texas A&M University. Turbomachinery Laboratories, 2014) Thilagan, Leslie; Pettinato, Brian; Rutan, Charles; Buck, Jeff; Schaefer, Alex; Turbomachinery Symposium (43rd : 2014); International Pump Users Symposium (30th : 2014)Item Discussion Group T07: Advanced Topics in Centrifugal Compressor Design(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016) Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, Jeffrey; Pettinato, Brian; Sorokes, Jim; Wagner, Norbert; Turbomachinery Symposium (45th : 2016)Item Discussion Group T09: Advanced Topics in Centrifugal Compressor Design(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2015) Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, Jeffrey; Pettinato, Brian; Sorokes, Jim; Wagner, Norbert; Turbomachinery Symposium (44th : 2015)Item Discussion Group T17 On Advanced Topics in Centrifugal Compressor Design(Texas A&M University. Turbomachinery Laboratories, 2011) Drosjack, Michael; Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, J. Jeffrey; Pettinato, Brian; Turbomachinery Symposium (40th : 2011)Item Discussion Group T17: Torsional Monitoring(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016) Moore, Jeff; Pettinato, Brian; Eldridge, Thomas; Kocur, John; Feese, Troy; Turbomachinery Symposium (45th : 2016)Item Discussion Group T18 Advanced Topics in Centrifugal Compressor Design(Texas A&M University. Turbomachinery Laboratories, 2012) Drosjack, Michael; Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, J. Jeffrey; Pettinato, Brian; Turbomachinery Symposium (41st : 2012)Item Discussion Group T19: Torsional Monitoring(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2015) Moore, Jeff; Pettinato, Brian; Eldridge, Thomas; Kocur, John; Feese, Troy; Turbomachinery Symposium (44th : 2015)Item Discussion Group T20: Torsional Monitoring(Texas A&M University. Turbomachinery Laboratories, 2014) Moore, J. Jeffrey; Pettinato, Brian; Eldridge, Thomas; Kocur, John; Turbomachinery Symposium (43rd : 2014)Item Discussion Group T9 Advanced Topics in Centrifugal Compressor Design(Texas A&M University. Turbomachinery Laboratories, 2013) Sandberg, Mark; Baldassarre, Leonardo; Baumann, Urs; Kuzdzal, Mark; Moore, J. Jeffrey; Pettinato, Brian; Sorokes, James; Turbomachinery Symposium (42nd : 2013)
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