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

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MAE 6530 - Propulsion Systems II Homework 4.2 @ Sea Level Assume Nozzle Optimized for Sea Level

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

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MAE 6530 - Propulsion Systems II

Homework 4.2

@ Sea Level

Assume Nozzle Optimized for Sea Level

Part 1
Stephen Whitmore
Stephen Whitmore
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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
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Stephen Whitmore
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MAE 6530 - Propulsion Systems II 95

Homework 4.3, Part 1

Assume ∞ = a

P02
P0a
Stephen Whitmore
4.2, Part 2
beta
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Stephen Whitmore
P01
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MAE 5420 - Compressible Fluid Flow 53

Section 6: Home Work 1, Part2

p∞

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)

P01

P0∞

,M1

⎧⎨⎪⎪⎪

⎩⎪⎪⎪

⎫⎬⎪⎪⎪

⎭⎪⎪⎪→ f (M∞ ,β)

P0 2

P01

→ f M1( )

P0 2

P0∞

=P0 2

P01

×P01

P0∞

...PlotP0 2

P0∞

vs θ

Stephen Whitmore
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Stephen Whitmore
(Recovery factor)
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Use Chart on Slide 5 to aid calculations
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4.2, Part 2 (cont’d)
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Stephen Whitmore
Stephen Whitmore
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