Question No$,14$: A $360$ hydrodynamic journal bearing

operates at $1200$ rpm and carries a load of $5\mathrm{.}5$ kN $.$ The

journal diameter is $55$ mm and length is $55$ mm $.$ The

bearing is lubricated with SAE $20$ oil and the operating

temperature of oil is $79C.$ Assume radial clearance as

$0\mathrm{.}025$ mm and the attitude angle as $600.$ Determine:

$($i$)$ bearing pressure,

$($ii$)$ Attitude,

$($iii$)$ minimum film thickness,

$($iv$)$ heat generated,

$($v$)$ heat dissipated, if the ambient temperature is

$25C,$ and

$($vi$)$ amount of artificial cooling if necessary.