If the pipe flow is air at 20c and 1 atm and the

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Unformatted text preview: y Guide 418 Chapter 6 Viscous Flow in Ducts D = 1.5 cm 20 m p = 400 kPa Flow reducer P6.146 L = 100 m D = 5 cm 3-cm orifice 500 holes (diameter 1 mm) P6.142 45 holes, 1.5-mm diameter 1 gal/min, results without the reducer? What reducer orifice diameter would decrease the flow by 40 percent? P6.143 A 10-cm-diameter smooth pipe contains an orifice plate with D: 1 D taps and 0.5. The measured orifice pres2 sure drop is 75 kPa for water flow at 20°C. Estimate the flow rate, in m3/h. What is the nonrecoverable head loss? P6.144 Accurate solution of Prob. 6.143, using Fig. 6.40, requires iteration because both the ordinate and the abscissa of this figure contain the unknown flow rate Q. In the spirit of Example 5.8, rescale the variables and construct a new plot in which Q may be read directly from the ordinate. Solve Prob. 6.143 with your new chart. P6.145 The 1-m-diameter tank in Fig. P6.145 is initially filled with gasoline at 20°C. There is a 2-cm-diameter orifice in the bottom. If the orifice is suddenly opened, estimate the...
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.

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