The Karman-Tsien compressibility correction rule, also known as the Karman-Tsien rule, is a concept in aerodynamics and fluid dynamics that provides a method for correcting the lift and drag coefficients (Cl and Cd) of an airfoil or wing operating at subsonic speeds to account for the effects of compressibility, specifically in the transonic regime. This rule is named after the two scientists who developed it: Theodore von Karman and Hsue-shen Tsien.
NOTE: This is the pressure coefficient, corrected for compressibility effects, at the minimum pressure location on the wing.
- Pressure coefficient (Cp)
- Incompressible pressure coefficient (Cp,0)
- Freestream Mach number (M∞)