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Transcript of Homework 4 - Webmae-nas.eng.usu.edu/MAE_6530_Web/subpages/Assignments/Assig… · 4.2, Part 2....

  • MAE 6530 - Propulsion Systems II

    Homework 4.2

    @ Sea Level

    Assume Nozzle Optimized for Sea Level

    Part 1

    Stephen Whitmore

    Stephen Whitmore1

  • MAE 6530 - Propulsion Systems II

    Homework 4.2 (2)

    7. Mean L/D for (Sea Level) Cruise Conditions

    AssumeStagnation

    Launch Weight = 2,150 kg

    hfuel = ηcombustor ⋅QR

    Part 1

    Stephen Whitmore

    Stephen Whitmore2

  • MAE 6530 - Propulsion Systems II 95

    Homework 4.3, Part 1

    Assume ∞ = a

    P02

    P0a

    Stephen Whitmore4.2, Part 2

    beta

    Stephen Whitmore

    Stephen WhitmoreP01

    Stephen Whitmore1

    Stephen Whitmore3

  • MAE 5420 - Compressible Fluid Flow 53

    Section 6: Home Work 1, Part2p∞

    M∞ = 1.7

    p∞ = 0.26 atm

    P0 2P0∞

    P0∞P01

    P0 2

    Normal Shockwave

    M1

    M2

    P0 2P0∞

    M∞ =1.7,θ=15o{ }

    b

    θ=15o

    Hint→

    β→ f (M∞ ,θ)

    P01P0∞

    ,M1⎧⎨⎪⎪⎪

    ⎩⎪⎪⎪

    ⎫⎬⎪⎪⎪

    ⎭⎪⎪⎪→ f (M∞ ,β)

    P0 2P01→ f M1( )

    P0 2P0∞=P0 2P01×P01P0∞

    ...PlotP0 2P0∞vs θ

    Stephen Whitmore

    Stephen Whitmore4

    Stephen Whitmore(Recovery factor)

    Stephen WhitmoreUse Chart on Slide 5 to aid calculations

    Stephen Whitmore

    Stephen Whitmore4.2, Part 2 (cont’d)

  • Stephen Whitmore

    Stephen Whitmore5