Browsing by Author "Cloud, C. Hunter"

Now showing items 1-18 of 18

    • Fundamentals of Fluid Film Journal Bearing Operation and Modeling 
      He, Minhui; Cloud, C. Hunter; Byrne, James M.; Vázquez, Jose A. (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 14: Widely used in turbomachinery, the fluid film journal bearing is critical to a machine’s overall reliability level. Their design complexity and application severity continue to increase making it challenging ...
    • Fundamentals Of Fluid Film Journal Bearing Operation And Modeling. 
      He, Minhui; Cloud, C. Hunter; Byrne, James M. (Texas A&M University. Turbomachinery Laboratories, 2005)
      Widely used in turbomachinery, the fluid film journal bearing is critical to a machine’s overall reliability level. Their design complexity and application severity continue to increase making it challenging for the plant ...
    • Journal Bearing Vibration and SSV Hash 
      DeCamillo, Scan M.; He, Minhui; Cloud, C. Hunter (Texas A&M University. Turbomachinery Laboratories, 2008)
      Peculiar, low-frequency, radial vibrations have been observed in various turbomachinery using tilt-pad journal bearings. Unlike discrete subsynchronous spikes that often indicate a serious problem, the vibrations are ...
    • L04: Predicting, Understanding and Avoiding the Ekofisk Rotor Instability 40 Years Later 
      Cloud, C. Hunter; Pettinato, Brian; Kocur, Jr., John (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
      A re-examination of the well-known Ekofisk re-injection centrifugal compressor is presented Several opportunities makethis an ideal candidate to assess how well (or not) current design and analytical methods have evolved ...
    • Lateral Rotordynamics of Petrochemical Equipment - Review, Examples and Problems 
      Kocur, John; Cloud, C. Hunter (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2017)
    • Predicting, Understanding and Avoiding the Ekofisk Rotor Instability Forty Years Later 
      Kocur, John; Cloud, C. Hunter; Pettinato, Brian (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This famous machine is re-examined to assess how well (or not) current design and analytical methods have evolved to avoid shaft whip instability. In addition to reviewing the compressors history and design evolution, the ...
    • Rotordynamic Design Audits of AMB Supported Machinery 
      Swanson, Erik E.; Maslen, Eric H.; Li, Guoxin; Cloud, C. Hunter (Texas A&M University. Turbomachinery Laboratories, 2008)
      Active magnetic bearings (AMBs) are a mature bearing technology that is being applied to many new turbomachines. They have become the bearing of choice for most new turboexpander applications. They are seen as a key enabling ...
    • Shop Acceptance Testing Of Compressor Rotordynamic Stability And Theoretical Correlation 
      Pettinato, Brian C.; Cloud, C. Hunter; Campos, Rogerio S. (Texas A&M University. Turbomachinery Laboratories, 2010)
      This paper presents the rotordynamic stability testing of a nine-stage centrifugal compressor used for hydrogen recycle service. The machine tested was of a basic design and employed no damper bearings, damper seals, shunts ...
    • Shop Rotordynamic Testing - Options, Objectives, Benefits & Practices 
      Cloud, C. Hunter; Kocur, John (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 18: Understanding the lateral rotordynamic behavior is critical in determining the reliability/operability of rotating equipment. Whether examining a centrifugal pump or compressor, steam or gas turbine, motor or ...
    • Shop Rotordynamic Testing - Options, Objectives, Benefits and Practices 
      Kocur, John A.; Cloud, C. Hunter (Texas A&M University. Turbomachinery Laboratories, 2013)
      Understanding the lateral rotordynamic behavior is critical in determining the reliability/operability of rotating equipment. Whether examining a centrifugal pump or compressor, steam or gas turbine, motor or generator, ...
    • Shop Rotordynamic Testing -- Options, Objectives, Benefits and Practices 
      Kocur, John; Cloud, C. Hunter (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2015)
    • Simplified Modal Analysis For The Plant Machinery Engineer 
      Vazquez, Jose A.; Cloud, C. Hunter; Eizember, Robert J. (Texas A&M University. Turbomachinery Laboratories, 2012)
      Experimental modal analysis and operating deflection shapes (ODS) are powerful tools in vibration analysis and machinery troubleshooting. However, the machinery plant engineer often doesn’t believe such techniques are ...
    • Simplified Modal Analysis for the Plant Machinery Engineer 
      Vázquez, José A.; Cloud, C. Hunter; Eizember, Robert J. (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Tutorial 6: Experimental modal analysis and operating deflection shapes (ODS) are powerful tools in vibration analysis and machinery troubleshooting. However, the machinery plant engineer often doesn’t believe such techniques ...
    • Steady State Performance Prediction Of Directly Lubricated Fluid Film Journal Bearings 
      He, Minhui; Byrne, James M.; Cloud, C. Hunter; Vazquez, Jose A. (Texas A&M University. Turbomachinery Laboratories, 2012)
      Predicting the performance of directly lubricated bearings is a challenge facing bearing manufacturers and end users alike. In this study, thermoelastohydrodynamic (TEHD) theories are applied to analyze three directly ...
    • Sub-Synchronous Vibrations On a Vertical Electrical Motor During Factory Testing Observed Phenomenon, Interpretation and Resolution 
      Quoix, Bernard; Cloud, C. Hunter; Gelin, Alain; He, Minhui (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2017)
    • Subsynchronous Vibrations on a Vertical Electrical Motor During Factory Testing – Observed Phenomenon, Interpretation and Resolution 
      Gelin, Alain; Cloud, C. Hunter; Quoix, Bernard; He, Minhui (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      During the factory tests of a vertical electric driven de-ballasting pump, casing vibrations were observed on the motor above the contractual limit of 2.8 mm/s, mainly on the motor’s top, Non-Drive End. Supported by fluid ...
    • T07: Shop Rotordynamic Testing Options, Objectives, Benefits and Practices 
      Cloud, C. Hunter; Kocur, John (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
      Understanding the lateral rotordynamic behavior is critical indetermining the reliability/operability of rotating equipmentWhether examining a centrifugal pump or compressor, steam orgas turbine, motor or generator, rotating ...
    • T9 - Lateral Rotordynamics of Petrochemical Equipment - Review, Examples and Problems 
      Kocur, John; Cloud, C. Hunter (Turbomachinery Laboratory; Texas A&M Engineering Experiment Station; Texas A & M University. Libraries, [2019])
      Reliability and operability of rotating equipment is strongly tied to its dynamic behavior. High vibrations resulting from poorly designed machinery can lead to bearing damage, efficiency loss due to internal rubbing, ...