Question

Consider a lightly loaded journal bearing using oil having the constant properties ρ 800 kg/m , μ/p 10-5 m2 /s, and k 0.13 W/mK. The journal diameter is 75 mm; the clearance (i.e. gap width) is 0.25 mm, and the bearing oper- ates at 3600 rpm (a) Determine the temperature distribution in the oil film assuming that there is no heat transfer into the journal and that the bear ing surface is maintained at 75° C (b) What is the rate of heat transfer from the bearing, and how much power is needed to rotate the journal?

Answer 1

Solution iven data oil propeshies P800 Kal Beasi D5 mm otl at 3600 0pm a) → ene distsi butow we

2. AKL Covibeing bounday Conditious → applying condztiaws tempa 2-

K.L 2. To LU K. and ntk ラSubstituting the values ow alove equati we ge / 800)1PX(lu.rs疒/-tl_2一山ヅ.제十.万 r ( 0.13

Rale of hest tease fon besing, ㄥ 2. heat sefeeted 0 25x0 1419 WI