Answer:
The heat transfer q = 18.32W
Explanation:
In this question, we are asked to calculate the heat entering the tube and also evaluate properties at T =400K
Please check attachment for complete solution and step by step explanation
A flat, circular hydrostatic air bearing has an outer diameter of 160 mm and a 5-mm-deep recess from the 50-mm diameter to the b
earing center. The air pressure in the recess is 2 MPa, and the pressure around the outside of the bearing is 0.1 MPa.
1. Determine the pressure distribution in the bearing if 0.3 kg of air is pumped through the bearing per second. The air density is 1 kg/m^3 at atmospheric pressure and the air viscosity is 18.2 x 10^-6 Pa-s at 22°C.
2. Also, calculate the air film thickness and the friction torque if the bearing rotates at 8000 rpm.
1. Determine the pressure distribution in the bearing if 0.3 kg of air is pumped through the bearing per second. The air density is 1 kg/m^3 at atmospheric pressure and the air viscosity is 18.2 x 10^-6 Pa-s at 22°C.
2. Also, calculate the air film thickness and the friction torque if the bearing rotates at 8000 rpm.
1 answer:
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Answer:
Explanation:
The formula for critical stress is
K is the plane strain fracture toughness
Y is dimensionless parameters
We are to Determine the Critical stress
Now replacing the critical stress with 54.8
a with 0.2mm = 0.2 x 10⁻³
Y with 1
The fracture will not occur because this material can handle a stress of 2186.20Mpa before fracture. it is obvious that is greater than 2023Mpa
Therefore, the specimen does not failure for surface crack of 0.2mm