The pressure coefficient () with perturbations, often denoted as , is a dimensionless parameter used in fluid dynamics and aerodynamics to describe the pressure variation at a specific point in a fluid flow that includes perturbations or disturbances. It is a modified version of the standard pressure coefficient that accounts for deviations from ideal or steady-state conditions.
- Pressure coefficient (Cp)
- Prandtl-Glauert parameter (β)
- Incompressible pressure coefficient (Cp,0)