Posted in Aerospace Engineering

Properties Of The Atmosphere

The atmosphere is composed of approximately 78% nitrogen (N2), 21% oxygen (O2), and 1% other gases by volume, which includes argon and carbon dioxide. Air is considered to be a uniform mixture of these gases, so we will examine its characteristics as a whole rather than as separate gases. 1. Static pressure (PS) is the force each air particle exerts on those around it. On a more macroscopic scale, ambient static pressure (14.7 psi at sea level on standard day) is equal to the weight of a column of air over a given area. The force of static pressure acts…