The “Upstream Mach Number” refers to the Mach number of a fluid or object at a specific point in a fluid flow that is located upstream (i.e., in the direction against the primary flow of the fluid). The Mach number is a dimensionless quantity that characterizes the speed of an object or fluid relative to the local speed of sound in the surrounding medium.Â
- Normal component of upstream Mach Number (Mn,1)
- Oblique shock wave angle (β) in radiansÂ
- Upstream Mach Number (M1)Â