Fluid Mechanics — Compressible Flow Calculator
Isentropic, normal- and oblique-shock flow for iPhone, iPad and Mac.
Fluid Mechanics lets you easily calculate compressible gas-flow parameters for isentropic flow and for normal and oblique shock waves — Mach number, wave and turn angles, area ratios, and pressure, temperature and density ratios.
iPhone · iPad · Mac
Features
Compressible flow, solved
- Isentropic flow input parameters — gas constant ɤ (Cp/Cv) and one of the following ten parameters:
- Mach number
- A/A* (subsonic or supersonic)
- T/To
- P/Po
- ρ/ρo
- P/P*
- T/T*
- ρ/ρ*
- Mach angle
- Prandtl-Meyer angle
- Isentropic flow output parameters:
- Mach number
- A/A*
- T/To
- P/Po
- ρ/ρo
- P/P*
- T/T*
- ρ/ρ*
- Mach angle
- Prandtl-Meyer angle
- Normal shockwave flow input parameters — gas constant ɤ (Cp/Cv), and one of the following seven parameters:
- Mach number upstream of shock (M1)
- Mach number downstream of shock (M2)
- P2/P1
- T2/T1
- ρ2/ρ1
- Po2/Po1
- P1/Po2
- Normal shockwave flow output parameters:
- Mach number upstream of shock (M1)
- Mach number downstream of shock (M2)
- P2/P1
- T2/T1
- ρ2/ρ1
- Po2/Po1
- P1/Po2
- Oblique shockwave flow input parameters — gas constant ɤ (Cp/Cv), the upstream Mach number M1, and one of the following:
- Turn (deflection) angle θ — weak solution
- Turn (deflection) angle θ — strong solution
- Wave (shock) angle β
- Upstream normal Mach number M1n
- Oblique shockwave flow output parameters:
- Wave (shock) angle β and turn (deflection) angle θ
- Upstream & downstream normal Mach numbers (M1n, M2n)
- Downstream Mach number M2
- P2/P1, T2/T1, ρ2/ρ1 and Po2/Po1 across the shock
- Detached-shock detection — no attached solution is shown when θ exceeds the maximum turn angle for M1
- Easily toggle between static-to-stagnation and stagnation-to-static ratios (1/x reciprocal) on every calculator.
- Copy results — press and hold the results grid until it highlights, then release to copy every calculated value to the clipboard for texting, email or reports.
- Built-in compressible-flow reference — schematic diagrams and concise theory for isentropic flow, normal shocks and oblique shocks, plus a summary property-comparison table.
- Reference ratio-of-specific-heats (ɤ) values for common gases — Air, O₂, N₂ and H₂ (1.40), Helium (1.67), Water vapor (1.33) and Propane (1.12).
- A user's guide is provided within the in-program help.
- Intuitive user interface.