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RISPrediction of Rotordynamic Performance of Smooth Stator-Grooved Rotor Liquid Annular Seals Utilizing Computational Fluid Dynamics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Circumferentially grooved, annular liquid seals typically exhibit good whirl frequency ratios (WFRs) and leakage reduction, yet their low effective damping can lead to instability. The current study investigates the ...
Rotordynamic Force Coefficients of Volutes and Diffusers for Prediction of Turbomachinery Vibration
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The American Petroleum Institute (API) level II vibration stability analysis for impellers requires higher fidelity models to predict the dynamic forces of the whirling impeller. These forces are in turn required to predict ...
A Transient Computational Fluid Dynamics, Phase Modulated, Multifrequency Approach for Impeller Rotordynamic Forces
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern high performance turbomachines frequently operate in supercritical condition above their first critical speed, rendering these machines prone to rotordynamic instability. The American Petroleum Institute (API) ...
A Transient Computational Fluid Dynamics, Phase Modulated, Multifrequency Approach for Impeller Rotordynamic Forces
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Modern high performance turbomachines frequently operate in supercritical condition above their first critical speed, rendering these machines prone to rotordynamic instability. The American Petroleum Institute (API) ...
Numerical Investigation of Back Vane Design and Its Impact on Pump Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Adding back vanes to the rear shroud of centrifugal pumps is sometimes practiced in order to alleviate large axial forces. Effective design and flow characteristics of back vanes remain obscure due to lack of knowledge ...
Swirl Brake Design for Improved Rotordynamic Vibration Stability Based on Computational Fluid Dynamics System Level Modeling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The accurate characterization of compressor rotordynamic coefficients during the design phase reduces the risk of subsynchronous vibration problems occurring in the field. Although rotordynamists extensively investigate ...