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Critical Speed Analysis Of An Eight-Stage Centrifugal Pump
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
A critical speed and unbalance response analysis of an eight-stage centrifugal pump was performed, considering the variation of stiffness and damping coefficients with speed for both the oil firm bearings and the fluid ...
Experimental Study Of The Influence Of Backflow Control On Pump Hydraulic-Mechanical Interaction
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
A series of right-angle pump intakes, incorporating minimum axial depths and decelerating flows, has been experimentally evaluated using an air flow test procedure. Performance was measured, internal flow fields observed ...
Modern Cavitation Criteria For Centrifugal Pumps
(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 ...
Flow Patterns Causing Instabilities In The Performance Curves Of Centrifugal Pumps With Vaned Diffusers
(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 ...
Forces On Centrifugal Pump Impellers
(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 ...
Experimental Determination Of The Reverse Flow Onset In A Centrifugal Impeller
(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 ...
Air Model Testing To Determine Entrance Flow Fields
(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 ...
Does Impeller Affect NPSHR?
(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 ...
Horizontal Process Pump Modifications To Comply With Api-610 Sixth Edition Forces And Moments
(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 ...
Control Of Backflow At The Inlets Of Centrifugal Pumps And Inducers
(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 ...