Fluids, hydraulics and flows
Simple compressor power
Calculates auxiliary compressor power from pressure increase, flow, and efficiency; it is not device selection.
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Isothermal compressor power
Calculates simplified ideal isothermal compression power from inlet pressure, flow, and outlet pressure.
Pump shaft power
Calculates required shaft power from hydraulic power and efficiency.
Pressure ratio
Calculates the ratio of two absolute pressures.
Choked pressure ratio
Calculates critical throat-to-stagnation pressure ratio for an ideal gas.
Simple receiver tank pressure decay
Calculates auxiliary receiver pressure decay; this is a diagnostic simplification, not an exact thermodynamic model.
Speed of sound in ideal gas
Calculates speed of sound from heat capacity ratio, specific gas constant, and temperature.