# CU06997 Lecture 4 ; Exercises

 Link to computation / answer Link to lecture 4 Link naar les 4 Exercise 1 For the frictionless syphon in Figure 2.4 (So there is no energy loss), determine the discharge and the pressure heads at A and B, given that the pipe diameter is 200 mm and the nozzle exit is 150 mm Assume fresh water and g = 10 [m/s2] Exercise 2 Distance between P1 en P2 (L) = 1500 m The ditch has a bed-slope [helling bodem] of 1:2000 Assume bed-slope = slope pressure line = slope total head Water-depth (D) = 1,5 m at P1 and P2 Discharge Q = 21 m3/s Bed width ditch (W) = 4 m Slope ditch (S) = 1:3 Assume fresh water and g = 10 [m/s2] Questions: Classify the flow at the part P1 – P2 (steady, unsteady, uniform, non uniform) Classify the flow at the weir (steady, unsteady, uniform, non uniform) Is the flow between P1 – P2 one, two or three dimensional? Is the flow at the weir one, two or three dimensional? Compare P1 and P2 with Bernoulli’s equation (with energy loss) Based on question 5, how much is the energy loss between P1 and P2. Exercise 3 Distance between P1 en P2 (L) = 1500 m The bed of the ditch is horizontal Water-depth (D) = 1,5 m at P1 Water-depth (D) = 1,2 m at P2 Discharge Q = 21 m3/s Bed width ditch (W) = 4 m Slope ditch (S) = 1:3 Assume fresh water and g = 10 [m/s2] Questions: Classify the flow at the part P1 – P2 (steady, unsteady, uniform, non uniform) Classify the flow at the weir (steady, unsteady, uniform, non uniform) Is the flow between P1 – P2 one, two or three dimensional? Is the flow at the weir one, two or three dimensional? Compare P1 and P2 with Bernoulli’s equation (with energy loss) Based on question 5, how much is the energy loss between P1 and P2.

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