EAS201: In an ideal unmixed-exhaust turbofan engine where the exhaust exit pressures of both the core engine: Aerospace Propulsion Assignment, SUSS, Singapore

Question 4 Question 4 a In an ideal unmixed – exhaust turbofan engine where the exhaust exit pressures of both the core engine and bypass duct are equal to ambient pressure, the thrust produced by the core engine 𝐹 𝐶 , and the fan 𝐹 𝐹 are: Where 𝑚 ̇ 𝐶 = mass flowrate of air through core engine 𝑚 ̇ 𝐹 = mass flowrate of air through bypass duct 𝑚 ̇ 𝑓 = fuel mass flowrate 𝑉 0 = forward velocity 𝑉 9 = core engine exhaust nozzle exit velocity 𝑉 19 = bypass duct nozzle exit velocity Write My Assignment Hire a Professional Essay & Assignment Writer for completing your Academic Assessments Native Singapore Writers Team 100% Plagiarism-Free Essay Highest Satisfaction Rate Free Revision On-Time Delivery Question 4 a(i) For a turbofan engine, explain the term specific thrust. If its bypass ratio 𝛼 = 𝑚 ̇ 𝐹 / 𝑚 ̇ 𝐶 , show that the specific thrust can be expressed as: Question 4a(ii) Define the term thrust specific fuel consumption of a turbofan engine, and hence show that it can be expressed in terms of its specific thrust as in the following: Question 4b At forward speed of 750 km/h, a turbofan engine with bypass ratio of 5 has a fuel-air ratio of 0.03. At the exhaust nozzles of both the bypass duct and core engine, the gases are fully expanded. The bypass exhaust exits at 450 m/s while the core engine exhaust exits at 500 m/s. Analyse the engine specific thrust. Buy Custom Answer of This Assessment & Raise Your Grades Get A Free Quote


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