Prandtl-Meyer Supersonic Expansion Fan Calculator

Calculate downstream Mach number (M2), isentropic static pressure and temperature drops, and expansion fan Mach wave angles around convex corners.

Upstream Mach Number M1:

Expansion Turn Angle θ (deg): Convex deflection away from flow

Specific Heat Ratio γ:

Upstream Static Pressure P1 (kPa or psi):

Downstream Mach Number (M2):

—

ΔM = + —

Downstream Static Pressure (P2):

—

P2 / P1 = —

Prandtl-Meyer Function ν(M1):

— °

Downstream PM Function ν(M2):

— °

Leading Mach Wave Angle (μ1):

—

Trailing Mach Wave Angle (μ2):

—

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