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Problem 2: An aircraft engine operates with two fluids, the free stream air and fuel. For a flight speed of 100 m/s (p.. =



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Problem 2: An aircraft engine operates with two fluids, the free stream air and fuel. For a flight speed of 100 m/s (p.. = 1 kg m Poo = 100,000 Pa, T = 300K) the engine outputs a plume with a velocity of 350 m/s and a density of p = 0.5. The engine m intake and outlet are both 1m and Given: VPP Tu mquel Given: Area Given: V.PR. Area Unknowns: PR =?,T =? Aircraft Engine the fuel provided at 1 kg/s. The goal is to obtain thrust. (a) Draw the appropriate control volume to obtain the thrust from the engine. Specifically highlight the surface where thrust is evaluated and how you design your control volume using the knowns. (b) Clearly list the approach you plan to take to obtain thrust. Specify which laws you will use with an explanation of why. What assumptions will you use and why? (1/4 to page) (c) Calculate the thrust using the process you lay out. (d) Use this result to explain how an engine uses combustion to produce thrust (3 to 5 sentences).

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