Investigation of thermohydrodynamic behaviour of gas foil journal bearing accounting slip-flow phenomenon

2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Jitesh Kumar ◽  
Debanshu S. Khamari ◽  
Suraj K. Behera ◽  
Ranjit K. Sahoo
Keyword(s):  
Journal Bearing ◽  
Slip Flow ◽  
Flow Phenomenon

scholarly journals Numerical investigation of slip flow phenomenon on performance characteristics of gas foil journal bearing

2020 ◽  
Vol 2 (10) ◽  
Author(s):  
Mohammad Autif Shahdhaar ◽  
Sandeep S. Yadawad ◽  
Debanshu S. Khamari ◽  
Suraj K. Behera
Keyword(s):  
Numerical Investigation ◽  
Journal Bearing ◽  
Slip Flow ◽  
Performance Characteristics ◽  
Flow Phenomenon

Pumping Characteristics of a Herringbone-Grooved Journal Bearing Functioning as a Viscous Vacuum Pump

1999 ◽  
Vol 122 (1) ◽  
pp. 131-136 ◽  
Author(s):  
S. Yoshimoto ◽  
Y. Ito ◽  
A. Takahashi
Keyword(s):  
High Speed ◽  
Journal Bearing ◽  
Slip Flow ◽  
Laser Scanner ◽  
Vacuum Pump ◽  
Chamber Pressure ◽  
Design Parameters ◽  
Theoretical Predictions ◽  
Flow Effects ◽  
Good Agreement

A laser scanner motor with low power and high speed has been developed. This scanner motor uses a herringbone-grooved journal bearing which functions as a viscous vacuum pump. The windage power loss of a polygon mirror is reduced, since the air inside the pump housing is pumped out by herringbone-grooved viscous vacuum action. In this paper, the theoretical pumping characteristic of this bearing is investigated, using the narrow-groove theory and accounting for first-order slip flow. The effects of various design parameters on the pumping characteristics are discussed. Optimum geometric design parameters were found to obtain the minimum inner chamber pressure of the housing. The theoretical predictions considering slip flow effects are in good agreement with experimental measurements. [S0742-4787(00)01801-4]

Reverse Flow as a Possible Mechanism for Cavitation Pressure Build-up in a Submerged Journal Bearing

2001 ◽  
Vol 124 (2) ◽  
pp. 320-326 ◽  
Author(s):  
M. Groper ◽  
I. Etsion
Keyword(s):  
Pressure Distribution ◽  
Present Model ◽  
Journal Bearing ◽  
Reverse Flow ◽  
Experimental Results ◽  
Flow Mechanism ◽  
Flow Phenomenon ◽  
Cavitation Pressure

An experimentally observed reverse flow phenomenon at the end tip of the cavitation zone of a submerged journal bearing is modeled and theoretically investigated. The shape of the cavity, the nature of the reverse flow and the pressure distribution in the bearing are calculated in an attempt to understand previous experimental observations of pressure build up in the cavitation zone. A comparison with the available experimental results reveals that the cavitation shape, the behavior of the reverse flow and the pressure distribution are fairly well predicted by the present model. The reverse flow mechanism is indeed capable to generate the level of the experimentally measured pressures, particularly towards the end of the cavitation zone.

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