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1988

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Turbomachinery Laboratory Website

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Recent Submissions

  • Improved Mechanical Seal Design Through Mathematical Modelling 

    Salant, Richard F.; Key, William E. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The mechanical seal manufacturer can now offer the user new seal designs quickly and efficiently, and can respond to trouble shooting requests rapidly, through the use of modern, computerized, seal design techniques. In ...
  • Experimental Determination Of The Reverse Flow Onset In A Centrifugal Impeller 

    Barran, Jean Paul; Caignaert, Guy; Canavelis, Richard (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The importance of problems related to machines operating at partial flow rate led to Societe Hydrotechnique de France (S.H.F.) to form a working group on the subject. In order to better understand partial flow phenomena ...
  • Horizontal Process Pump Modifications To Comply With Api-610 Sixth Edition Forces And Moments 

    Steiger, James E. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The forces and moments stiffness criteria established by API-610, Sixth Edition has resulted in a new generation of horizontal process pumps and baseplates, each with increased structural rigidity. Pictures and text ...
  • Does Impeller Affect NPSHR? 

    Konno, Daisuke; Yamada, Yoshiyuki (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The relationship between centrifugal pump impeller diameter, specific speed, noise and NPSH required is presented in this paper. A theoretical explanation is given to explain why NPSHR will significantly vary with impeller ...
  • Control Of Backflow At The Inlets Of Centrifugal Pumps And Inducers 

    Sloteman, Donald P.; Cooper, Paul; Dussord, Jules L. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    Cavitation surge or the interaction of backflow from the inlet of a centrifugal pump or inducer at low flow and low NPSH can be eliminated by the use of backflow recirculator. Experimental results from four pumps demonstrate ...
  • Changes In Hydraulic Component Geometries Greatly Increased Power Plant Availability And Reduced Maintenance Costs: Case Histories 

    Makay, Elemer; Barrett, James A. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    A systematic investigation was started within the Texas Utilities Generating Company Power station feedwater pump systems due to unsatisfactory unit availability, frequent equipment breakdown, high maintenance costs, and ...
  • Acoustic Resonance Phenomena In High Energy Variable Speed Centrifugal Pumps 

    Schwartz, Randal E.; Nelson, Richard M. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The design of reliable pumps is of the utmost importance in petrochemical and power installations. Downtime can be costly in terms of lost production and in the power industry loss of generating capability. In order to ...
  • Selection Strategy For Mechanical Shaft Seals In Petrochemical Plants 

    Bloch, Heinz P. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    Petrochemical plants are confronted with an increasing number of available mechanical seal designs. The user must choose from among inexpensive standard seals and exotic, high engineered seal models. We have seen seal costs ...
  • Symmetrical Seal Design: A Sealing Concept For Today 

    Netzel, James P. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The symmetrical seal offers a significant advancement in seal design to pump manufacturers and users it is the first alternative design to complex seal arrangements which are required to fit a stuffing box designed for ...
  • Table of Contents for the Proceedings of the 1st International Pump Symposium 

    International Pump Users Symposium (1st : 1984) (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
  • Air Model Testing To Determine Entrance Flow Fields 

    Silvaggio, Joseph A. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    The designer of the centrifugal pump impellers requires knowledge of the velocity flow field entering the impeller for several reasons. These include an assurance that a reasonably uniform field exists, that the leading ...
  • Pump Specifications That Improve Mechanical Seal Performance 

    Ingram, James H. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    As the chemical, petrochemical and petroleum refining industries continue to experience a slower growth rate than at any time in the last 10 years, emphasis on cost reduction, equipment reliability and “the wat we do our ...
  • Introduction To Rotordynamics Of Pumps Without Fluid Forces 

    Leader, Malcolm E. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    This paper is for the user of rotating equipment, Reliability is the key to the bottom line and rotordynamics is often the significant factor in determining reliability. Rotordynamics is a very interesting and complicated ...
  • Predicting And Improving The Dynamic Behavior Of Multistage High Performance Pumps 

    Bolleter, Ulrich; Frei, Arno; Florjancic, Dusal (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    Good rotordynamic behavior, implying sufficient stability margin and low sensitivity to unbalance forces, is mandatory for modern high pressure multistage pumps. Stiffness, damping and mass matrices describing the forces ...
  • Maintenance And Troubleshooting Of Single-Stage Centrifugal Pumps 

    Nelson, W. Ed (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
    A centrifugal pump’s hydraulic performance and reliability can differ drastically from its published performance expectations. The cause of the discrepancy may involve the hydraulic features of the pump. NPSH (net positive ...
  • A Map Of The Forest .. Understanding Pump Suction Behavior: Where Do We Go From Here? 

    Karassik, Igor J. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1984)
  • Forces On Centrifugal Pump Impellers 

    Jery, Belgacem; Brenne, Christopher E.; Caughey, Thomas K.; Acosta, Allan J. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
    Forces are exerted on a centrifugal pump impeller, due to the asymmetry of the flow caused by the volute or diffuser, and to the motion of the center of the impeller whenever the shaft whirls. Recent work in the measurement ...
  • Flow Patterns Causing Instabilities In The Performance Curves Of Centrifugal Pumps With Vaned Diffusers 

    Hergt, Peter; Starke, Jorg (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
    It is well known that backflow regimes at the impeller inlet can lead to performance instabilities for centrifugal pumps at flowrates smaller than about 65 percent of the impeller inlet design flowrate. Performance curve ...
  • Modern Cavitation Criteria For Centrifugal Pumps 

    Gopalakrishnan, S. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
    It is well known that the performance of a rotordynamic pump deteriorates when the suction pressure is reduced below a certain value. The suction pressure is usually qualified in relation to the vapor pressure at the suction ...
  • Pump Selection And Application In A Pressurized Water Reactor Electric Generating Plant 

    Kitch, David M. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
    Various pump applications utilized in a nuclear pressurized water reactor electric generating plant are described. Emphasis is on pumps installed in the auxiliary systems of the primary nuclear steam supply system. Hydraulic ...

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