The slope of a right-running Mach wave characteristic between points four and five refers to the rate of change of certain properties of a gas as it passes through a Mach wave that is propagating to the right. In aerodynamics and gas dynamics, Mach waves are shock waves or expansion waves that travel through a fluid medium when an object moves through the fluid at a supersonic or subsonic speed. Points four and five represent specific locations within the flow field.
- The slope of right running Mach wave characteristic between points four and five
- Angle between velocity to the below velocity at point four (𝜃4) in rad
- Angle between velocity to the below velocity at point five (𝜃5) in rad
- Angle between above streamline to the velocity at point four (𝜇4) in rad
- Angle between velocity to the below horizontal at point five (𝜇5) in rad