*Neal Tetervin, Chia Chiao Lin*

*naca-tn-2158*

*Aug 1950*

A general integral form of the boundary-layer equation is derived from the Prandtl partial-differential boundary-layer equation. The general integral equation, valid for either laminar or turbulent incompressible boundary-layer flow, contains the Von Karman momentum equation, the kinetic-energy equation, and the Loitsianskii equation as special cases.

*An Adobe Acrobat (PDF) file of the entire report:*

http://naca.central.cranfield.ac.uk/reports/1950/naca-tn-2158.pdf