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Design And Retrofit Of A Low Solidity Diffuser For A Pipeline Centrifugal Gas Compressor Application.
(Texas A&M University. Turbomachinery Laboratories, 1997)
A high efficiency, single-stage pipeline centrifugal gas
compressor, originally designed with a wedge-type vaned diffuser,
was retrofitted with a vaneless diffuser along with two low solidity
diffuser configurations in ...
Vibration Reduction Or Large Steam Turbine Generator Through Bearing Analysis/Modification.
(Texas A&M University. Turbomachinery Laboratories, 1997)
Large utility steam turbines have experienced very high vibration levels on their generator exciter bearings. Units where the exciter rotor is supported by a single bearing are particularly susceptible. This synchronous ...
Discovering, The Hard Way, How A High Performance Coupling Influenced The Critical Speeds And Bearing Loading Of An Overhung Radial Compressor - A Case History.
(Texas A&M University. Turbomachinery Laboratories, 1997)
A case is presented where significant unacceptable vibration levels were encountered during mechanical testing of a single stage overhung radial compressor used in a mechanical vapor recompression process. The contract ...
Turbine Remanufacture - One Option For Reliability And Efficiency Improvement.
(Texas A&M University. Turbomachinery Laboratories, 1997)
A case study of a remanufacture of a steam turbine is presented. The turbine has been in service for 20 years. Thermal and physical stresses have taken their toll on the turbine casing and supporting hardware. Remanufacture ...
Risk Based Maintenance Of Turbomachinery.
(Texas A&M University. Turbomachinery Laboratories, 1997)
The authors help maintenance staff compete effectively for
scarce corporate resources. Their presentation defines important
concepts, including expected cost of failure ("risk"), avoided
consequential cost, and value ...
Expert Systems Provide Support For A Proactive Machinery Management Methodology.
(Texas A&M University. Turbomachinery Laboratories, 1997)
In today's competitive business environment, one is constantly called upon to make decisions that directly influence operations, and, therefore, profitability. In recent years, it has been necessary to evaluate not just ...
Field Testing Of Gas Turbine Driven Centrifugal Compressor Packages - Test Procedures And Measurement Uncertainties.
(Texas A&M University. Turbomachinery Laboratories, 1997)
Field testing of gas turbine compressor packages requires the
accurate determination of efficiency, flow, head, power, and fuel
flow in sometimes less than ideal working environments.
Nonetheless, field test results ...
Application Of Dry Gas Seals In Special Purpose Steam Turbines.
(Texas A&M University. Turbomachinery Laboratories, 1997)
Noncontacting dry gas mechanical face seals are being routinely
applied to steam turbines to reduce new construction project costs
and improve overall plant operating efficiencies. Historically, most
of the applications ...
Confirming Centrifugal Compressor Aerodynamic Performance Using Limited Test Data Combined With Computational Fluid Dynamic Techniques.
(Texas A&M University. Turbomachinery Laboratories, 1997)
Facing increased market demands for improved aerodynamic efficiency, centrifugal compressor manufacturers must be able to predict and quote the best performance available from the machinery they produce. Confidence in these ...
Annular Gas Seals And Rotordynamics Of Compressors And Turbines.
(Texas A&M University. Turbomachinery Laboratories, 1997)
The possible negative or positive impact of annular seal on
rotordynamics of compressors and steam turbines is discussed. The
nature of destabilizing forces that can be developed by "seethrough"
and interlocking labyrinths ...