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Lecture_14 - AOE/ME 4234 Lecture 14 AOE/ME 4234 1 Overview...

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AOE/ME 4234 1 AOE/ME 4234 Lecture 14 9-28-07
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AOE/ME 4234 2 Overview Turbines Compressors Different designs for air-breathing engines
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AOE/ME 4234 3 Typical Turbojet a 1 2 3 4 5,6 7
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AOE/ME 4234 4 Turbojet Engine Analysis For ideal Flow Analysis Reversible adiabatic compression and expansion Burner is modeled as frictionless Heat addition process Changes in Kinetic Energy is negligible Perfect gas
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AOE/ME 4234 5 T-S Plot of Ideal Turbojet a,2 3 4 5,6 7 7A 6A T S
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AOE/ME 4234 6 Analysis Procedure 1. Given Q R , T 04 , P c , M a 2. Define η and γ for each component and their values are given 3. Diffuser Inlet conditions T 01 , P 01 , given T 0a and M a 4. Compressor Inlet Conditions T 02 , given M a , γ , T 01 , η d 5. Compressor Outlet Condition T 03 , given P c , η c 6. Burner Fuel to air Ratio f, given Q R , T 04 , η b 7. Turbine Inlet Condition P 04 , if there are any losses in Burner given P rb = 8. Turbine Outlet Conditions T 05 and P 05 , given η t and γ t 9. If there is no afterburner and no losses, Nozzle inlet
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