4-4. a. Air flowing thru a 100-m long pipe from a source at 100 bara to 1 bara.
The pipe is 0.5 cm in diameter. For air, from Table 4-3 in the text, 1.40
The velocity head loss, K, is due entirely to the pipe length, 4
For new, commercial steel pipe, from Table 4-1, the pipe roughness is 0.046 mm
Assuming fully developed turbulent flow, Equation 4-34 is used to calculate the friction
For our specific case, the pressure drop ratio is,
a. Since the velocity head loss is high, we can use the asymptotic solution using Equation 4-