RAGHUVIR PAI

Prof. RAGHUVIR PAI

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Research Focus & Metrics

Academic Career Length

36Years (1991-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2012 in Tribology International
Verified
Journal Article
Closed access
Satish Shenoy B.Satish Shenoy B.
Satish Shenoy B.
KBK.G. Binu
K.G. Binu
RAGHUVIR PAIRAGHUVIR PAI
RAGHUVIR PAI
DRD.S. Rao
D.S. Rao
RPR.S. Pai
R.S. Pai

1 February 2004 in Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Verified
Journal Article
Closed access
BMB C Majumdar
B C Majumdar
RAGHUVIR PAIRAGHUVIR PAI
RAGHUVIR PAI
DHD J Hargreaves
D J Hargreaves
The steady state and dynamic characteristics including whirl instability of water-lubricated journal bearings having three axial grooves are obtained theoretically. The Reynolds equation is solved numerically by the finite difference method satisfying the appropriate boundary conditions. The dynamic behaviour in terms of stiffness and damping coefficients of film and stability are found using a first-order perturbation method. It has been shown that both load capacity and stability improve when smaller groove angles are used.


5 August 2016 in Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Verified
Journal Article
Closed access
PDF file
RMRavindra Mallya
Ravindra Mallya
Satish Shenoy B.Satish Shenoy B.
Satish Shenoy B.
RAGHUVIR PAIRAGHUVIR PAI
RAGHUVIR PAI
The static characteristics of misaligned three-axial water-lubricated journal bearing in the turbulent regime are analyzed for groove angles 36° and 18°. Ng and Pan’s turbulence model is applied to study the turbulence effects in the journal bearing. The static parameters such as load-carrying capacity, friction coefficient, and side leakage are found for different degree of misalignment (DM). The change in flow regime of the lubricant from laminar to turbulent and the increase in misalignment, improved the load capacity of the bearing. For lightly loaded bearings, the friction coefficient of the bearing increased with the increase in Reynolds number.

1 May 2008 in Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Verified
Journal Article
Closed access
RPR S Pai
R S Pai
RAGHUVIR PAIRAGHUVIR PAI
RAGHUVIR PAI
The non-linear transient analysis of water-lubricated journal bearings having four-axial and six-axial grooves is studied theoretically. The time-dependent form of the generalized Reynolds equation has been written as the governing equation in non-dimensional form. The Reynolds equation is solved by a finite-difference technique with a successive over-relaxation scheme, satisfying the Jakobsson—Floberg—Olsson boundary conditions. A non-linear time-transient analysis is carried out and the stability of journal is studied. The equations of motion are solved by the fourth-order Runge—Kutta method to obtain the eccentricity ratio, attitude angle, and their derivatives for the next time step.\newline\indent This study is performed for unidirectional constant load, unidirectional periodic load, and variable rotating load. The journal locus is plotted from the values of eccentricity ratio and attitude angle, and it helps in predicting the status of the system.