posted 1 years ago

You need: 1) identify a small region for the CFD simulation;

2) generate the appropriate geometry using ANSYS

3) generate the necessary mesh

4) follow the steps in the tutorial to perform CFD simulation of the heat transfer in a non-stagger tube bank

5) compare you results with that from the staggered tube bank and explain the difference in terms of heat transfer and pressure distribution around the cylinder.

6) show the pressure contours (show at least 3 rows and four columns of tube banks),

7) show the temperature contours

8) plot the streamlines

9) temperature and pressure variations along the vertical lines A-A and B-B

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posted 1 years ago

Calculate the efficiency of the cycle.

Calculate the back work ratio.

How does the cycle compare with real world Brayton cycles? Is it better or worse than most?it unreasonably good or truly awful?

A Brayton cycle operates with an inlet temperatures of 1500 K and 320 K for the turbine andcompressor respectively. The compressor pressure ratio is 12 and air arrives at the compressor at110 kPa.

posted 1 years ago

(b)Butane gas undergoes a change of state from an initial condition of 2 MPa and 160°C to 3.5MPa and 227°C. Using departure functions and the thermodynamic data below calculate thechange in enthalpy and entropy.(12)

units of J kg1 K, where T is the temperature in kelvin. The enthalpic and entropicdeparture functions for butane are given by:

\text { At } 2 \mathrm{MPa} \text { and } 160^{\circ} \mathrm{C}, h-h^{\mathrm{ig}}=-2.4263 \mathrm{~kJ} / \mathrm{mol} \text { and } s-s^{\mathrm{i} 8}=-3.9507 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}

\text { At } 3.5 \mathrm{MPa} \text { and } 227^{\circ} \mathrm{C}, h-h^{i 8}=-3.2693 \mathrm{~kJ} / \mathrm{mol} \text { and } s-s^{\mathrm{i} 8}=-4.7567 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}

Using the Peng-Robinson equation of state, what is h- h for 56.11 g of 1-butene at 2 MPa and160°C?(c)(4)

You might find the PREOS spreadsheet useful to answering part (c), but you are welcome to useother sources of information if you wish. You must describe how you went out about answeringthis question, which is simply assessing your ability to obtain information.

\text { The heat capacity at constant pressure is } c_{\mathrm{p}}=9.487+0.3313 T-1.108 \times 10^{-4} T^{2}-2.822 \times 10^{-9} T^{3} \text { in }

posted 1 years ago

a) Calculate flow velocity immediately after installation

b) Calculate current flow velocity and current value of Manning coefficient

c) Briefly explain why a water supply line can be designed to flow safely whennearly full but a sewer or storm drain cannot

posted 1 years ago

a) Estimate how many seconds for student to travel 1 mile (5,280 ft) downstream

b) Calculate Froude number and state whether a hydraulic jump is possible

c) Estimate maximum water depth in channel at which a hydraulic jump could form

d) Briefly explain why depth immediately after approximately equal downstream normal depth (i.e. tailwater depth) hydraulic jump should

posted 1 years ago

a) Calculate flow rate (cfs) in channel

b) Calculate critical depth in channel

c) Briefly explain how critical depth is used to measure flow rate in an open channel