Rework Problem 6.28 with the assumption that the momentum of the incoming air at section (1) is zero. Determine the exit velocity, v, and the magnitude of the pressure drop at section (1). 

Data From Problem 6.28

The figure illustrates the operation of an air lift pump. Compressed air is forced into a perforated chamber to mix with the water so that the specific gravity of the air€“water mixture above the air inlet is 0.5. Neglecting any pressure drop across section (1), compute the discharge velocity v of the air€“water mixture. Can Bernoulli's equation be used across section (1)?

Transcribed Image Text:

v = ? 0.90 m Compressed air 1.8 m