Module 1: Flow around Bodies
Preliminary Design of a UAV Aerofoil.
Design Specification.
A preliminary design of a low-speed UAV needs to be completed. The UAV should have a wingspan of no greater than 2 m and an altitude cruising speed in the range of 150-250 km/h. The maximum altitude is 1000 m. The design task is to complete a preliminary selection of aerofoil geometry. The mass of the UAV is estimated to be 45 kg. The wing should feature a simple hinged flap. The performance the aerofoil should be simulated in XFOIL (a freely available aerofoil tool for design and analysis) for take-off and altitude cruise.
Design Task Deliverables.
- Dimensions of aerofoil: mean chord length and wingspan.
- The take-off and landing speed.
- The altitude cruise speed.
- Estimate the thrust required to overcome drag force on the wings at take-off and cruise.
- Demonstrate performance of the aerofoil section using the XFOIL software under the required conditions including operation of a hinged flap.
Module 2: Open Channel Flow
Design of a flow rate measurement system for an open channel flow.
Design Specification.
Water flows in a open channel. The channel is rectangular with a base of 2 m width and 2 m height. The flow rate can vary between 10 L/s and 800 L/s. Your task is to design a weir- based flow measurement system. The system needs to have capability for remote monitoring, although this is not a requirement for this design. The weir design should be guided by relevant standards on flow measurement. The accuracy needs to be within 1 L/s. The channel should not overtop at the maximum flow rate!
Design Deliverables
- The weir type and geometry (drawings).
- Water depths upstream and downstream of the weir.
- Estimate the measurement uncertainty as a function of flow rate.
- Demonstrate compliance with relevant codes on flow measurement.
- Specify commercial components specified to measure water depth.
Module 2: Turbomachinery Design of a pumping system.
Design Specification.
Fresh water at 20° C needs to be pumped from a lower tank to an upper tank in an industrial process.
The lower tank is 4 m high, and the free surface at the maximum operating level (MOL) is 1 m below the floor level where the pump is located. The water depth in this tank may vary between 2 m and 3 m (MOL). The upper tank is 3 m deep and the free surface at MOL is located 8 m above the height of the floor where the pump is located.
The total length of pipe between the pump and lower tank is 8 m, and the total length between the pump outlet and the upper tank is 16 m. An in-line valve is required near the pump outlet and a foot valve at the inlet. A maximum daily volume of 5000 m3 is required to be transferred. Other minor losses may be ignored.
Design Deliverables
- Specify a commercially available pump.
- Estimate the pump efficiency and running costs (daily energy usage).
- Specify pipe sizes and material.
- Estimate the hydraulic losses.
- Show that cavitation will not occur.
- Specify a commercial in-line valve and also a foot valve.
- Specify a flow measurement method.
| Criteria | High Distinction | Distinction | Credit | Pass | Fail | Score/10 | |
| 1 | Design a holistic fluidic system to meet all specified requirements (40%) | A holistic design solution is concisely presented that meets all design requirements and is representative of best practice. | A holistic design solution is presented that meets most specified design requirements. | A holistic design solution is is presented that has some flaws that will reduce the system performance. | A holistic design solution is presented but contains major flaws that will invalidate the system performance | ||
| 2 | Analyse the performance of a basic fluid system design under a wide range of operating conditions. (40%) | Appropriate analysis is identified and implemented correctly at an appropriate level to model how the design performs under a specified wide range of operating conditions. | Analysis is presented to model how the design will perform under a wide range of operating conditions. | Analysis is presented to model performance under wide range of different operating conditions and is mostly correct but contains minor flaws or is lacking in detail. | Analysis of design performance under a wide range of operating conditions is omitted and/or is majorly flawed. | ||
| 3 | Document a basic system design using a technical report format. (20%) | The report contains and concisely presents all elements to document the design, is free of grammatical and spelling errors, and follows the specified report format. | The report documents the design at a basic level of detail but omits key details in some areas or deviates from the specified report format. | The report is presented but fails to document the design or does not follow the specified report format. | |||
| Total |
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