Lecture.5 - AE 1350 Lecture Notes#5 WE HAVE LOOKED AT Why should we study properties of atmosphere Ideal Gas Law p = RT Variation of Temperature

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AE 1350 Lecture Notes #5

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WE HAVE LOOKED AT. . Why should we study properties of atmosphere? Ideal Gas Law: p = ρ RT Variation of Temperature with Altitude Variation of Pressure with Altitude Variation of Density with Altitude Tables of Standard Atmosphere
TOPICS TO BE COVERED Incompressible flow Streamlines and stream tubes Conservation of Mass (Continuity)

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Incompressible Flow Air is a compressible fluid. Its density WILL change if temperature changes, or if some external force is applied. Example: A child squeezing a balloon A flow is said to be incompressible if there are no changes in density attributable to (or caused by) the velocity or speed of the flow. Theory and observations in wind tunnels suggest that most flows may be treated as incompressible (I.e. constant density) until the Mach number is sufficiently high (>0.4 or so.)
What has flow speed got to do with compressibility? Fluid particles send out signals in the form of acoustic

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This note was uploaded on 08/17/2011 for the course AE 1350 taught by Professor Johnson during the Spring '07 term at Georgia Institute of Technology.

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Lecture.5 - AE 1350 Lecture Notes#5 WE HAVE LOOKED AT Why should we study properties of atmosphere Ideal Gas Law p = RT Variation of Temperature

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