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categoryالهندسة الميكانيكية schoolبكالوريوس event_available2026-07-15

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Question 3: For lubrication flow as covered in the 11/18 lecture, find the pressure distribution along the length of the bearing with: h(x)=h₂+(h-h₂) the following boundary conditions: P(x = 0) = P(x=L) = P∞ P.. stationary slipper pad bearing flow direction bottom plate moving ho h₁ at constant horizontal velocity U Now with U=10 m/s, L-4 cm, ho=0.1 mm, plot how the pressure distribution along the length would look like for h₁/ho=0.2, 0.3, 0.5. Assume the fluid is SAE 30 Oil at 20°C (see table below). Also, with U=10 m/s, L-4 cm, ho=0.1 mm and hi/ho-0.2, plot the pressure distribution if SAE 30 Oil is at 20°C, 40°C and 60°C. What can you conclude about the load the bearings can take based on area of constriction and oil temperature? The properties of SAE 30 Oil is given below: Temp. [°C] Dyn. Viscosity [mPa.s] Kin. Viscosity [mm²/s] Density [g/cm³] 0 1124.10 1257.25 0.8941 10 491.10 553.20 0.8878 228228 20 239.39 271.56 0.8815 30 128.42 146.70 0.8754 40 74.55 85.76 0.8693 50 46.43 53.80 0.8630 60 30.58 35.69 0.8569 70 21.17 24.89 0.8506 80 15.28 18.10 0.8444 90 11.42 13.62 0.8383

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