QU The journal speed of a 100mm diameter journal is 2500 rpm. The journal is supported by a short hydrodynamic bearing of length L = 0.6D, eccentricity ratio = 0.75 and a clearance ratio C/R = 0.001. The radial load on the bearing is 10 kN. The lubricant is SAE 30, and the operating temperature of the lubricant in the bearing is 700C. 1- Assume infinitely-short-bearing theory, find the min. and max. oil film thickness. 2- Derive the equation for the pressure wave around the bearing, at the center of the width (y=0). 3- Find the attitude angle, friction torque, and the friction power losses.

QU The journal speed of a 100mm diameter journal is 2500 rpm. The journal is supported by a short hydrodynamic bearing of length L = 0.6D, eccentricity ratio = 0.75 and a clearance ratio C/R = 0.001. The radial load on the bearing is 10 kN. The lubricant is SAE 30, and the operating temperature of the lubricant in the bearing is 700C. 1- Assume infinitely-short-bearing theory, find the min. and max. oil film thickness. 2- Derive the equation for the pressure wave around the bearing, at the center of the width (y=0). 3- Find the attitude angle, friction torque, and the friction power losses.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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