Same as Problem 1 but film is at 190°F.
Problem 1
A 2 in. diameter × 2 in. long 360° bearing is lubricated with SAE 20 oil. Speed is 900 rpm. Load P is 40 psi projected area, r/c = 500. Cooling rate for housing is 2 Btu per hour per square foot per degree F. Take housing area in cooling as 8 times the developed journal area. Find the rise in housing temperature ΔTh if the film temperature is 175°F.
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