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Two water reservoirs A and B are connected to each other through a 35m-long, 2-cm-diameter cast...

Two water reservoirs A and B are connected to each other through a 35m-long, 2-cm-diameter cast iron pipe with a sharp-edged

Two water reservoirs A and B are connected to each other through a 35m-long, 2-cm-diameter cast iron pipe with a sharp-edged entrance. The pipe also involves a swing check valve and a fully open gate valve. The water level in both reservoirs is the same, but reservoir A is pressurized by compressed air while reservoir B is open to the atmosphere at 94 kPa. If the initial flow rate through the pipe is 1.2 L/s, determine the air pressure (gage) in kPa on top of reservoir A. Take p=999.7 kg/m3,J=1.307x10-3 Pas and e=0.260mm Air 2 cm
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Answer #1

= 1-22/sec, - 1.2XTO DE 0.02m. 3.14 x 10 ml A - T VO A 3.819 m/sec = Re = PvD = u 999.7* 3: 819 10:02 1-3077 10 = 58,421.64 -total loss = AP Y О:3) + 54.63 — PA Po PA - #g - 9-81x (Ss. 261) P 94 + 542-1) IPA 636 • 21 Ерк

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