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Unformatted text preview: reduced due to ground effects. Estimate the maximum force acting on a 3-ft by 6-ft window facing the storm. Ans: 196 lbf H 2 O C V 3) Two Pitot-static tubes are shown. The one on the left is used to measure the velocity of air ( V A ), and is connected to an air-water manometer as shown. The one on the right is used to measure the velocity of water ( V W ),, and it too is connected to an air-water manometer as shown. If the deflection h is the same for both manometers, then one can conclude that (show your work & explain why) a) V A = V W b) V A > V W c) V A < V W 4) Consider the flow of air in the pipe shown below. a) Calculate the flow velocity in the pipe. b) What assumptions did you need to make for part a? How valid do you think they are? c) If the pressure difference between 1 and 2 had been 900 mm H 2 O instead of 8 mm H 2 O would any of the assumptions listed in part b be invalid? Explain fully. 12 mm H 2 o 20 mm H 2 o 1 water...
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- Spring '06
- Fluid Dynamics, Pressure measurement, Vacuum, Stagnation pressure