Browsing Turbomachinery and Pump Symposia by Author "Vance, John M."

Now showing items 1-6 of 6

    • Annular Gas Seals And Rotordynamics Of Compressors And Turbines. 
      Childs, Dara W.; Vance, John M. (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 ...
    • Critical Speeds Of Turbomachinery: Computer Predictions Vs. Experimental Measurements. 
      Vance, John M.; Murphy, Brian T.; Tripp, Harley A. (Texas A&M University. Turbomachinery Laboratories, 1984)
      As a result of a continuing demand for increased performance, modern turbomachines are sometimes designed to operate near a critical speed. Machines for petrochemical and natural gas service have been purchased and delivered ...
    • Design And Application Of Squeeze Film Dampers In Rotating Machinery. 
      Zeidan, Fouad Y.; Andres, Luis San; Vance, John M. (Texas A&M University. Turbomachinery Laboratories, 1996)
      There are common misconceptions and occasional misapplications associated with squeeze film dampers. The authors have worked for more than 25 years researching, experimenting, and applying this subject matter to all types ...
    • Electric Shaft Currents In Turbomachinery. 
      Vance, John M.; Palazzolo, Alan B.; Zeidan, Fouad Y. (Texas A&M University. Turbomachinery Laboratories, 1987)
      Electrical damage to turbomachinery parts has caused a number of machinery failures and many hours of costly downtime. The problem of electrical voltages and currents being generated in non-electrical machines has puzzled ...
    • An Improved Method For Calculating Critical Speeds And Rotordynamic Stability Of Turbomachinery 
      Murphy, Brian T.; Vance, John M. (Texas A&M University. Turbomachinery Laboratories, 1981)
      A number of the computer programs for rotordynamic stability and critical speed prediction in common use during recent years have been based on the works of Myklestad, Prohl and Lund. Programs of this type, called transfer ...
    • Using A Damper Seal To Eliminate Subsynchronous Vibrations In Three Back-To-Back Compressors. 
      Richards, Robert L.; Vance, John M.; Paquette, Donald J.; Zeidan, Fouad Y (Texas A&M University. Turbomachinery Laboratories, 1995)
      A new type of labyrinth seal that reduces cross coupled rotor forces and produces a remarkable amount of damping has been invented at Texas A&M University. Laboratory tests have shown complete elimination of critical speeds ...