Compressibility

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Compressibility

1. The property of a substance, as air, by virtue of which its density increases with increase in pressure.
2. = coefficient of compressibility.
In aerodynamics, this property of the air is manifested especially at high speeds (speeds approaching that of sound and higher speeds). Compressibility of the air about an aircraft may give rise to buffeting, aileron buzz, shifts in trim, and other phenomena not ordinarily encountered at low speeds, known generally as compressibility effects.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use