L’ represents the lift force per unit span, which is the aerodynamic force that is perpendicular to the fluid flow direction, acting on a unit length of the object. Lift is a critical aerodynamic force responsible for generating upward forces and supporting the weight of aircraft and other objects in flight.
- Static pressure at the bottom of the wedge (p1) in N/m^2
- Length of the face of the wedge (l) in m
- Lift force per unit span (L’) in N/m