Isentropic Flow Calculator

Eliot GeversEliot Gevers

Calculate thermodynamic properties across an isentropic flow. Isentropic flow is a flow process where entropy remains constant, which occurs in ideal compressible flow with no heat transfer or friction.

Isentropic Flow Results:

Mach Number

2.000

Supersonic flow

Area Ratio

1.688

A/A* (ratio to sonic throat)

Pressure Ratio

0.1278

p/p₀ (static to stagnation)

Temperature Ratio

0.5556

T/T₀ (static to stagnation)

Density Ratio

0.2300

ρ/ρ₀ (static to stagnation)

Pitot Pressure Ratio

5.6404

p₀₂/p₀ (for supersonic with shock)

Mach Angle

30.00°

μ = sin⁻¹(1/M) - Angle of Mach wave

Prandtl-Meyer Angle

26.38°

ν - Maximum turning angle for isentropic expansion

Specific Heat Ratio (γ)

1.400

Gas: Air

Open Source & Transparent

This tool is open source and the underlying logic is fully transparent. You can view the source code, understand the calculations, and even contribute improvements to make it better for everyone.

View Source Code