1. Which of the pressure drop between the entrance and the exit of the venture meter...
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1. Which of the pressure drop between the entrance and the exit of the venture meter (between points A and C) and the pressure drop between the entrance and throat of the venture (between points A and B) is greater?. Is this what you expected? Explain why. 2. Which of the experimental and the theoretical flow rate is greater? Is this what you expect? Say why? 3. Using the Excel spreadsheet, draw a graph of the variation of the experimental flow rate QE (y-axis) in function of the theoretical flow rate QT (x-axis). 4. Fit a linear trendline and show the equation on the graph? 5. Write the value of the slope and say what it represents? 6. What is the meaning of the venture coefficient Cv? 7. Can it (Cy) be greater than one? Why? 8. What would be the meaning of Cy=1? 9. The venturi meter has a steep entrance and gentle exit angles. Discuss why? 1 Entrance- Pipe Throat Water Experimental Throat Reading # Diameter Diameter Density Flowrate DB DA (=DC) [m] 0.0064 [m] 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 2 3 4 5 6 7 8 9 10 P [kg/m³] 997 997 997 >]1-1ª8ª5893-22 997 997 997 997 997 997 997 DLM 7 Venturi [L/min] pressure Pd [mbar] 50 100 150 200 225 290 370 540 620 660 Entrance Experimental Exit pressure Flowrate QE [m³/s] **********} [mbar] 1.500E-04 2.150E-04 2.533E-04 2.933E-04 3.083E-04 3.450E-04 3.900E-04 4.667E-04 4.967E-04 5.250E-04 0.0006 0 3.217E-05 3.217E-05 Throat Area AB [m²] 4.909E-06 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 0.0005 0.0004 1 0.0003 0.0002 0.0001 0 Pipe Area AA (= Ac) [m²] 0.00001 Entrance- Throat pressure Pd Pa QE vs. QT 5066 10133 15199 20265 22798 29384 37490 54716 62822 66875 Theoretical Entrance- Pipe Exit pressure Velocity Pv Pa 0.00002 0.00003QT 0.00004 6080 12058 17023 21988 24318 30904 39111 56235 63733 69408 y = 8.7405x +1E-05 :. 0.00005 V₁ [m/s] 0.4922 0.6961 0.8525 0.9844 1.0441 1.1854 1.3389 1.6176 1.7332 1.7883 0.00006 Theroreti Actual Pipe cal Velocity Flowate V₂ Q₁ [m/s] [m³/s] 4.663E+00 1.583E-05 6.683E+00 2.239E-05 7.875E+00 2.743E-05 9.118E+00 3.167E-05 9.585E+00 3.359E-05 1.072E+01 3.813E-05 1.212E+01 4.307E-05 1.451E+01 5.204E-05 1.544E+01 5.576E-05 1.632E+01 5.753E-05 0.00007 Venturi Coefficient Cv 9.473E+00 9.601E+00 9.237E+00 9.263E+00 9.179E+00 9.047E+00 9.054E+00 8.968E+00 8.908E+00 9.126E+00 1. Which of the pressure drop between the entrance and the exit of the venture meter (between points A and C) and the pressure drop between the entrance and throat of the venture (between points A and B) is greater?. Is this what you expected? Explain why. 2. Which of the experimental and the theoretical flow rate is greater? Is this what you expect? Say why? 3. Using the Excel spreadsheet, draw a graph of the variation of the experimental flow rate QE (y-axis) in function of the theoretical flow rate QT (x-axis). 4. Fit a linear trendline and show the equation on the graph? 5. Write the value of the slope and say what it represents? 6. What is the meaning of the venture coefficient Cv? 7. Can it (Cy) be greater than one? Why? 8. What would be the meaning of Cy=1? 9. The venturi meter has a steep entrance and gentle exit angles. Discuss why? 1 Entrance- Pipe Throat Water Experimental Throat Reading # Diameter Diameter Density Flowrate DB DA (=DC) [m] 0.0064 [m] 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 0.0064 0.0025 2 3 4 5 6 7 8 9 10 P [kg/m³] 997 997 997 >]1-1ª8ª5893-22 997 997 997 997 997 997 997 DLM 7 Venturi [L/min] pressure Pd [mbar] 50 100 150 200 225 290 370 540 620 660 Entrance Experimental Exit pressure Flowrate QE [m³/s] **********} [mbar] 1.500E-04 2.150E-04 2.533E-04 2.933E-04 3.083E-04 3.450E-04 3.900E-04 4.667E-04 4.967E-04 5.250E-04 0.0006 0 3.217E-05 3.217E-05 Throat Area AB [m²] 4.909E-06 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 3.217E-05 4.909E-06 0.0005 0.0004 1 0.0003 0.0002 0.0001 0 Pipe Area AA (= Ac) [m²] 0.00001 Entrance- Throat pressure Pd Pa QE vs. QT 5066 10133 15199 20265 22798 29384 37490 54716 62822 66875 Theoretical Entrance- Pipe Exit pressure Velocity Pv Pa 0.00002 0.00003QT 0.00004 6080 12058 17023 21988 24318 30904 39111 56235 63733 69408 y = 8.7405x +1E-05 :. 0.00005 V₁ [m/s] 0.4922 0.6961 0.8525 0.9844 1.0441 1.1854 1.3389 1.6176 1.7332 1.7883 0.00006 Theroreti Actual Pipe cal Velocity Flowate V₂ Q₁ [m/s] [m³/s] 4.663E+00 1.583E-05 6.683E+00 2.239E-05 7.875E+00 2.743E-05 9.118E+00 3.167E-05 9.585E+00 3.359E-05 1.072E+01 3.813E-05 1.212E+01 4.307E-05 1.451E+01 5.204E-05 1.544E+01 5.576E-05 1.632E+01 5.753E-05 0.00007 Venturi Coefficient Cv 9.473E+00 9.601E+00 9.237E+00 9.263E+00 9.179E+00 9.047E+00 9.054E+00 8.968E+00 8.908E+00 9.126E+00
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International Business and the New Realities
ISBN: 978-0136090984
2nd Edition
Authors: S. Tamer Cavusgil, Gary Knight, John R. Riesenberger
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