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RECENT TEST EXPERIENCES WITH APPLYING MULTIPLE UNSHROUDED IMPELLERS IN A SINGLE-SHAFT COMPRESSOR
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
The use of unshrouded impellers to increase the pressure ratio and volume reduction achieved in low mole weight, single-shaft compressor applications is discussed. The aerodynamic and mechanical implications of using ...
Laser Welding for Turbomachinery Rotor Restoration
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
Laser cladding is gaining acceptance for restoration of turbine and compressor shafts, which has resulted in increased customer demand for laser cladding options. This has increased the number of laser welding suppliers, ...
Experimental and Numerical Analysis of Starvation in a Tilting Pad Journal Bearing
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
A series of journal bearing tests were conducted to acquire more detailed information on the behavior of individual pads in a tilting pad journal bearing and how the individual behavior may affect the performance and dynamic ...
EFFECT OF REDUCED OIL FLOW RATE ON THE STATIC AND DYNAMIC PERFORMANCE OF A TILTING PAD JOURNAL BEARING RUNNING IN BOTH THE FLOODED AND EVACUATED CONDITIONS
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
The lecture presents measurements of the static and dynamic load performance conducted with a tilting pad journal bearing running under flooded and evacuated conditions and lubricated with flow rates ranging from a nominal ...
High Frequency Acoustic Excitation in Centrifugal Compressor and Adjacent Piping Vibration
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
In a centrifugal compressor, interactions between impeller blades and stationary parts such as diffuser vanes will generate high frequency pressure pulsations. The frequencies of these pulsations, so called “blade passing ...
Stability Analysis of a Multi-stage Gas Compressor With Swirl-brakes Using Three Dimensional Transient CFD Model
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
Minimizing fluid induced forces through the secondary leakage flow paths in shrouded centrifugal impellers is crucial to improve the rotordynamic stability of high-pressure centrifugal gas compressors. Swirl brakes (SBs) ...
Development and Application of Very High Flow Covered Stages for Process Centrifugal Compressors
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
For 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 ...
AN EFFECTIVE METHOD TO SEPARATE THE FORWARD AND BACKWARD NATURAL FREQUENCIES IN TURBOMACHINERY VIBRATION TEST MEASUREMENTS
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
As speed and power density increase, validation of analytical prediction with actual test data plays an important role to ensure avoidance of critical speeds in high-speed turbomachinery and a reliable design. For a typical ...
TECHNICAL TRENDS FOR ELECTRICAL COMPRESSOR DRIVE SYSTEMS ABOVE 30,000 hp
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
The presentation will give and overfiew of electrical drive technology that can be used to drive compressors in the power range above 30,000 hp. Technical trends will be discussed with a focus on variable speed drives (VFD) ...
A PRACTICAL APPROACH FOR MEASURING ENERGY AND CARBON PERFORMANCE OF TURBOMACHINERY IN OFFSHORE APPLICATIONS
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
The purpose of this work is to present the first results of a practical approach developed for measuring the performance on energy and carbon of turbomachinery installed at offshore oil production plants, based on the ...