MECH2002 Fluid Mechanics Assignment

Assignment Help Mechanical Engineering

Reference no: EM132529420

MECH2002 Fluid Mechanics - Macquarie University

Part A: Determine the feasibility of conveying water via a gravity system pipeline

1. Considering reservoir TWL is at RL115m, model the arrangement in EPANET. A snapshot of the model should be presented in the report. A table showing the CH, RL and for junctions and length for segments should be also presented.

2. Determine the flow rate delivered at the dam in MLD (Mega-litter per day).

3. Plot the hydraulic grade line (HGL) between the reservoir and the dam. For this purpose, you should collect the total head at each node and plot it versus CH. Show the ground profile on the same plot. The axes must have labels with proper units.

4. A hand calculation for the variation of the total head from the reservoir to J3 should be presented. Compare the hand calculation with the model output and discuss the results.

5. Evaluate whether the energy line intersects with the ground profile at any point. This evaluation allows determining if the gravity system pipeline will work. Support your answer by proper discussion.

6. Find minimum reservoir TWL to ensure HGL remain at least 2m above the highest ground surface profile elevation, you must plot HGL and ground profile for the new TWL.

Part B: Consider there is a tunnel between nodes J20 and J22 to avoid high pick of J21. For these conditions, design a pressurised system by introducing a pump while the reservoir TWL is RL83m to achieve the best efficiency performance. The pump is located at J1 and the pump curve is given in Fig. 2.

1. Plot system curve for a range of flow rates Q=5, 10, 20, 30, 40, and 50 MLD. The system curve is computed as
H_p = (z₂ - z₁) + (fL/D + ΣK) Q2/2gA²

where L is the total pipe length, D is the pipe internal diameter, A is the pipe area, g = 9.81 m/s² is the gravity and f can be found from Moody diagram using the Reynolds number and the pipe roughness. Create a table, presenting L, D, A, ΣK, f and Hp for each flow rate.

2. Overlay pump curve with the system curve and determine the best operating point

3. Run model in EPANET by setting up the pump and introducing the pump curve, Plot the hydraulic grade line (HGL) between the reservoir and the dam

Report format

• You must provide a professional typed report for the client. The report must be submitted in PDF format electronically on iLearn with a cover page.
• The report must be concise. Use proper headers to organise the report. Irrelevant material and blurry, unclear figures must be avoided. Use captions and labels for figures and tables. Support your design and calculations with a proper discussion.

Attachment:- Fluid Mechanics.rar

Reference no: EM132529420

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