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AH_1 > L_4 > Flashcards

L_4 Flashcards

1
Q

troposphere

A

sea level up to about 10 km

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2
Q

stratosphere

A

10 km to 50 km

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3
Q

mesosphere

A

50 km and 80 km

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4
Q

thermosphere

A

above about 80 km

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5
Q

weather occurs mainly in this region of the atmosphere

A

troposphere

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6
Q

stratosphere temperature

A

characterized by a temperature plateau around 220 to 230 K

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7
Q

mesosphere temperature trend

A

becomes colder with altitude

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8
Q

thermosphere temperature trend

A

temperature rises fast with altitude

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9
Q

ozone layer

A

18 to 25 km

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10
Q

homosphere definition and altitude range

A

constant composition

0 to about 100 km altitude

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11
Q

heterosphere

A

changing composition of atmosphere

above 100 km

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12
Q

Average altitude ranges and temperatures provided in previous cards:

What are the actual dependencies for them?

A

geographical latitude

seasons

atmospheric tides

sun-spot activities

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13
Q

U.S. standard atmosphere temperature at sea level

A

15 °C

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14
Q

large density fluctuations can occur in this altitude range providing large impact to aero and aerothermal performance

A

60 to 80 km altitude range

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15
Q

in-flight data to capture for vehicle performance understanding

A

pinf

Tinf

rho_inf

vehicle speed relative to local air

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16
Q

turbo propulsion approximate Mach and velocity

A

up to about Mach 3

(velocity about 1 km/s)

17
Q

ram-jet approximate Mach and velocity

A

about 3 < Mach < 7

about 1 km/s < velocity < 2 km/s

18
Q

scram-jet propulsion approximate Mach and velocity

A

about 4 < Mach < 12 to 14

about 1.2 km/s < velocity < 4 to 4.5 km/s

AH_1 (4 decks)

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