Pressure Drop in Isothermal Compressible Flow. Air at 288 K and 275 kPa abs enters a pipe and is flowing in isothermal compressible flow in a commercial pipe having an ID of 0.080 m. The length of the pipe is 60 m. The mass velocity at the entrance to the pipe is 165.5 kg/m^2Ā·s. Assume 29 for the molecular weight of air. Calculate the pressure at the exit. Also, calculate the maximum allowable velocity that can be attained and compare with the actual.
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We can use the ideal gas law to calculate the density of the air at the entrance to the pipe. Ļ = P / (R * T) where Ļ is the density, P is the pressure, R is the specific gas constant, and T is the temperature. Given: P = 275 kPa = 275,000 Pa R = 8.314 J/(mol*K) Show moreā¦
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