EAS 4710 Aerospace Design 2

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EAS 4710 Aerospace Design 2
2. Hypersonic Missions in the Lower Atmosphere
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T1000K 3000K 5000K
Thrust to orbit 200s
Lift to orbit or reentry 500s
200 150 100 50 0
Suborbital flight 600s
Altitude (kft)
Cruise 500 to 5000s
Oxygen dissociation
Hypersonic flight envelope
Powered artillery 200s
0 5 10
15 M
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boost-to-cruise 2007
Modular engines in a quantum combined cycle
arrangement
Advanced fuels
Smart material TPS
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space launcher 2012
Engine-airframe integration
Combined cycle engine
Smart material TPS
Modular engines
Trajectory shaping
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hypersonic cruiser 2020
Smart materials TPS
Drag reduction/active cooling
Combined cycle/modular engines
Engine-airframe integration
Advanced fuels
Low density/O atom effects
Trajectory optimization
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1989 Military applications
ALTITUDE (KFT)
contours of constant dynamic pressure
Too heavy
Area 2
200 100 0
Area 3
Low Earth orbit
SR-71
Area 1
Too hot
Ballistic missiles
0 5 10 15 20 25
30 Mach no.
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1989 National Aero-Space Plane
Altitude (KFT)
Shuttle entry
200 100 0
Shuttle ascent
X-15
NASP corridor
SR-71
Burya
XB-70
Current limit of powered controlled flight
experience
0 5 10 15 20 25
30 Mach no.
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Flight envelope for high speed cruise vehicles
Lines of constant q
Altitude (kft)
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Scenario technology tree
Space access
Hypersonic strike
Engine cycles
HC
Propellant technology
H2
Safety and reliability
Man-rated
Unmanned
Reusability/recoverability
hypersonic time 10s of mins
Materials technology
hypersonic time mins
Structural morphing
100s of lbs
1000s of lbs
Initial cost and OM
integration
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Continuous vs. combined cycles

• Vertical launch and D0 acceleration from M0 to
  M10 with HC fuel
• Continuous combined cycle airbreathing engine
  (Isp6000/M)
• Pure rocket (Isp300)
• Rocket from M0 to 2 (Isp300)and ramjet from 2
  to 5 and scramjet from 5 to 10 (Isp6000/M)

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Continuous vs. combined cycles
Vertical launch and D0, acceleration from M0 to
M10 with HC fuel
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Combined cycles for space access
ALTITUDE (KFT)
Shuttle entry
200 100 0
Shuttle ascent
Rocket M15 to orbit
Scramjet 5ltMlt15
Ramjet 2.5ltMlt5
Rocket 0ltMlt2.5
0 5 10 15 20 25
30 Mach no.