Pressure Nm Pa
Hydrodynamics flowofliquids Density kgm
Gas dynamics flowofgases
temperature C k C 273.16
Aerodynamics flowof air
velocity MIs
KEYTERMS
P PRT Equationofstate
for a perfectgas
R gasconstant 287J kgkforair
STANDARD ATMOSPHERE
KEYTERMS
GeometricAltitude the geometricheightabovesealevel
Absolute Altitude Distanceto the centrepointof the earth If v radiusofearth then ha hgtr
ha 100A
STRATOSEHERE
11km 20km65,000ft
byIsothermalregion
Defined
3600117
80
60
TROPOSPHERE
0 11km36,000ft
Definedbytemperature or gradientregion
Fff
Isothermal Regions Gradient Regions
art
isolationhit
I e 20
isolationhit
D
e polar 160 280 240 280
Temperature R