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 Author Topic: Air density/pressure and temperature vs altitude  (Read 23352 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Fu-Kwun Hwang
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 « Embed this message on: February 21, 2010, 11:27:20 pm » posted from:Taipei,T\'ai-pei,Taiwan

This simulation display how air density, air pressure and temperature vary with altitude.

The formulas used were from http://wahiduddin.net/calc/density_altitude.htm

h=44.3308 - 4.94654 P^{0.190263} where h = geopotential altitude (km), p=actual air pressure, Pascals
However, pressure is convert to atm (1 atm= 101325 Pa).

h=44.3308 -42.2665 D^{0.234969} were used to calculate density from altitude h (km). The unit for density D is $kg/m^3$

The temperature is estimated with $T(h)= 15- 6.5 *h$

You can drag the dot shown in the curve to change the altitude h (or drag the slider vertically up/down)

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