The pressure coefficient () remains a dimensionless parameter used in fluid dynamics and aerodynamics to describe the change in pressure at a specific point on an airfoil or aerodynamic surface relative to the freestream pressure (). However, when the perturbations are significant or greater than one, it indicates that the flow conditions at that point are highly disturbed, and the local pressure may differ significantly from the freestream pressure.
- Horizontal perturbation velocity (û) in m/s
- Freestream velocity (V∞) in m/s
- Vertical perturbation velocity (v̂) in m/s
- Pressure coefficient (Cp)