The Prandtl-Glauert factor (), often denoted as the Mach correction factor, is a mathematical factor used in aerodynamics to account for the compressibility effects that occur when an object, such as an aircraft, moves at speeds close to the speed of sound. This factor is used primarily in subsonic and transonic aerodynamic calculations to approximate the effects of compressibility.
- Prandtl-Glauert factor (𝜆)
- Freestream Mach number (M∞)