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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
1
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 Whitmore
2
MAE 6530 - Propulsion Systems II 95
Homework 4.3, Part 1
Assume ∞ = a
P02
P0a
Stephen Whitmore
4.2, Part 2
beta
Stephen Whitmore
Stephen Whitmore
P01
Stephen Whitmore
1
Stephen Whitmore
3
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
Stephen Whitmore
4
Stephen Whitmore
(Recovery factor)
Stephen Whitmore
Use Chart on Slide 5 to aid calculations
Stephen Whitmore
Stephen Whitmore
4.2, Part 2 (cont’d)
Stephen Whitmore
Stephen Whitmore
5
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