The Prandtl-Meyer angle after a deflection () represents the angular deviation of the flow direction due to a change in the flow’s path caused by shock waves, expansion waves, or other flow disturbances. It quantifies the change in the flow’s direction after passing through these waves.
- is the Prandtl-Meyer angle after the deflection.
- is the Prandtl-Meyer angle before the deflection.
- is the deflection angle.